WEBVTT 00:00:07.880 --> 00:00:10.759 You're in the bay. Once you get over to the bed, 00:00:10.919 --> 00:00:13.560 we'll give you the story. Everything's going 00:00:13.560 --> 00:00:17.339 to happen super fast. Welcome to the emergency 00:00:17.339 --> 00:00:42.530 room. Pulse check! No pulse. You know, usually 00:00:42.530 --> 00:00:44.549 when we talk about a medical diagnosis, there's 00:00:44.549 --> 00:00:47.070 this, well, this expectation of mechanical precision. 00:00:47.310 --> 00:00:49.509 Absolutely, like you want a clear answer. Yeah, 00:00:49.670 --> 00:00:52.030 like you break your arm, the x -ray shows that 00:00:52.030 --> 00:00:54.109 jagged white line, and the doctor just points 00:00:54.109 --> 00:00:56.469 to the screen and says, there it is, you know? 00:00:57.189 --> 00:01:00.070 Yeah. Broken or not broken, it's clean, it's 00:01:00.070 --> 00:01:03.060 visible. Right. We really crave that visibility 00:01:03.060 --> 00:01:06.159 in medicine. We want to look at a monitor, read 00:01:06.159 --> 00:01:08.420 a number, and just have it give us a simple, 00:01:08.680 --> 00:01:11.079 undeniable answer. Exactly. We basically want 00:01:11.079 --> 00:01:13.280 the body to act like a machine we can just plug 00:01:13.280 --> 00:01:17.129 a diagnostic tool into. you step into the world 00:01:17.129 --> 00:01:19.849 of physiological labor, you step into obstetric 00:01:19.849 --> 00:01:22.469 nursing, and suddenly that x -ray machine is 00:01:22.469 --> 00:01:25.390 just completely useless. Completely. We're looking 00:01:25.390 --> 00:01:28.230 at a diagnostic landscape that is incredibly 00:01:28.230 --> 00:01:31.870 murky. I mean, you are trying to assess two entirely 00:01:31.870 --> 00:01:34.189 different patients at the exact same time. The 00:01:34.189 --> 00:01:37.230 mother. the fetus. Yeah and one of them is locked 00:01:37.230 --> 00:01:39.329 inside a fluid -filled vault where you literally 00:01:39.329 --> 00:01:42.109 can't even see them. Right. It is the absolute 00:01:42.109 --> 00:01:46.810 definition of diagnostic muddy waters and that 00:01:46.810 --> 00:01:49.790 complexity is exactly why we are dedicating this 00:01:49.790 --> 00:01:52.010 time to physiological labor and nursing management. 00:01:52.170 --> 00:01:54.950 Yeah, we're taking a mountain of clinical guidelines, 00:01:55.290 --> 00:01:57.430 pathophysiology, textbooks, and evidence -based 00:01:57.430 --> 00:01:59.989 nursing practices, and we are just distilling 00:01:59.989 --> 00:02:03.049 it all down for you. Exactly. Consider us your 00:02:03.049 --> 00:02:05.909 clinical mentors for this deep dive. Our mission 00:02:05.909 --> 00:02:08.669 right now is to aggressively apply the Pareto 00:02:08.669 --> 00:02:11.409 principle. Right, the whole 80 -20 rule. Yes. 00:02:11.830 --> 00:02:15.009 We are sifting through the noise to extract the 00:02:15.009 --> 00:02:17.590 20 % of obstetric concepts that are going to 00:02:17.590 --> 00:02:20.349 yield 80 % of the value for you. And by value, 00:02:20.469 --> 00:02:22.810 we mean what is actually going to show up on 00:02:22.810 --> 00:02:25.310 your nursing exams. What will trick you on the 00:02:25.310 --> 00:02:28.030 NCLEX? And most importantly, what is going to 00:02:28.030 --> 00:02:30.750 inform your real -world clinical judgment when 00:02:30.750 --> 00:02:33.150 you are actually standing at the bedside? Right, 00:02:33.150 --> 00:02:35.189 because we are focusing relentlessly on safety. 00:02:35.389 --> 00:02:37.629 Maternal safety, fetal safety, prioritization, 00:02:38.310 --> 00:02:40.169 and, well, spotting those classic clinical traps. 00:02:40.469 --> 00:02:42.889 Oh, those traps are everywhere. They're designed 00:02:42.889 --> 00:02:45.289 to test if you truly understand the underlying 00:02:45.289 --> 00:02:48.789 physiology, or if you just memorized a list of 00:02:48.789 --> 00:02:51.849 textbook facts. Which, spoiler alert, memorization 00:02:51.849 --> 00:02:54.750 will totally fail you in an emergency. It really 00:02:54.750 --> 00:02:57.770 will. Understanding the why and the how is what 00:02:57.770 --> 00:03:01.210 will actually save your patient. So, we're talking 00:03:01.210 --> 00:03:04.770 directly to you. The future nurse, whose critical 00:03:04.770 --> 00:03:07.229 thinking is quite literally going to dictate 00:03:07.229 --> 00:03:09.750 whether a mother and baby go home safely. You 00:03:09.750 --> 00:03:12.610 need to know what matters, why it matters, and 00:03:12.610 --> 00:03:15.310 the exact sequence of actions to take when things 00:03:15.310 --> 00:03:17.949 go wrong. But before we can jump into the high 00:03:17.949 --> 00:03:20.270 adrenaline emergencies like cord prolapses and 00:03:20.270 --> 00:03:22.969 fetal decelerations, we kind of have to understand 00:03:22.969 --> 00:03:24.729 what actually gets the baby out in the first 00:03:24.729 --> 00:03:26.889 place. Yeah, we have to unpack the foundational 00:03:26.889 --> 00:03:30.090 mechanics of labor. So we hear this phrase, the 00:03:30.090 --> 00:03:33.169 five P's. all the time in nursing school. Passenger, 00:03:33.409 --> 00:03:35.870 passage, powers, position, and psyche. It sounds 00:03:35.870 --> 00:03:37.969 a bit like a corporate synergy seminar, doesn't 00:03:37.969 --> 00:03:40.009 it? It totally does. Like, let's circle back 00:03:40.009 --> 00:03:42.330 on the five P's. But let's break down what this 00:03:42.330 --> 00:03:44.569 actually means at the bedside, starting with 00:03:44.569 --> 00:03:46.860 the passenger. Right, that's the fetus. But it's 00:03:46.860 --> 00:03:48.759 not just about the baby existing, is it? It's 00:03:48.759 --> 00:03:51.280 about their geometric relationship to the mother's 00:03:51.280 --> 00:03:55.139 pelvis. Exactly. The passenger is a dynamic participant. 00:03:55.860 --> 00:03:58.060 When we evaluate the fetus as the passenger, 00:03:58.219 --> 00:04:01.360 we are assessing four specific anatomical relationships. 00:04:01.439 --> 00:04:03.659 Okay, what are they? Presentation, position, 00:04:04.000 --> 00:04:06.819 lie, and attitude. Let's start with presentation. 00:04:07.460 --> 00:04:10.900 This simply means what anatomical part of the 00:04:10.900 --> 00:04:14.280 fetus is entering the pelvic inlet first. In 00:04:14.280 --> 00:04:17.459 a safe, uncomplicated labor, this is cephalic, 00:04:17.459 --> 00:04:21.000 head first. But if I'm doing a sterile vaginal 00:04:21.000 --> 00:04:24.269 exam, I can't actually see the head. I'm just 00:04:24.269 --> 00:04:26.449 feeling around in the dark. How do I actually 00:04:26.449 --> 00:04:28.610 know it's a head and not say a buttock? Well, 00:04:28.829 --> 00:04:31.529 you are feeling for specific skeletal landmarks. 00:04:31.589 --> 00:04:33.930 The fetal skull isn't a solid cue ball, right? 00:04:34.589 --> 00:04:37.490 It's made of membranous spaces called fontanels 00:04:37.490 --> 00:04:40.490 and intersecting lines called sutures. Ah, right. 00:04:40.649 --> 00:04:42.709 So when you sweep your fingers over the presenting 00:04:42.709 --> 00:04:45.629 part, a cephalic presentation will feel hard 00:04:45.629 --> 00:04:47.990 and round, and you will physically trace those 00:04:47.990 --> 00:04:49.889 suture lines. Yeah, if it's not the head. If 00:04:49.889 --> 00:04:52.509 it's a breech presentation, you are going to 00:04:52.509 --> 00:04:56.189 feel the soft, smooth, irregular tissue of the 00:04:56.189 --> 00:04:58.329 buttocks. You might even feel the cleft. Oh, 00:04:58.350 --> 00:05:01.410 wow. OK. Or in a compound presentation, you might 00:05:01.410 --> 00:05:03.790 feel a hand slipping down alongside the head. 00:05:04.069 --> 00:05:06.550 OK, so presentation is the body part. Yeah. Got 00:05:06.550 --> 00:05:09.629 it. Then there is the fetal lie. This is the 00:05:09.629 --> 00:05:11.629 relationship of the fetal spine to the maternal 00:05:11.629 --> 00:05:13.970 spine. Yeah, think of it as an axis. A longitudinal 00:05:13.970 --> 00:05:16.649 lie means the spines are parallel. Like they're 00:05:16.649 --> 00:05:19.500 lined up? Exactly. The mother's spine and the 00:05:19.500 --> 00:05:21.500 baby's spine are lined up in the same vertical 00:05:21.500 --> 00:05:24.259 direction. The baby could be head down or the 00:05:24.259 --> 00:05:26.720 baby could be breeched, but the axis is parallel. 00:05:26.959 --> 00:05:29.279 Okay. A transverse lie on the other hand means 00:05:29.279 --> 00:05:32.819 the baby is horizontal. The fetal spine is perpendicular 00:05:32.819 --> 00:05:35.319 to the mother's spine. And obviously a baby cannot 00:05:35.319 --> 00:05:37.959 be delivered vaginally if they're lying sideways 00:05:37.959 --> 00:05:40.649 across the pelvis. I mean... The math just doesn't 00:05:40.649 --> 00:05:43.050 work. It physically does not work. But here is 00:05:43.050 --> 00:05:44.550 where it gets really interesting and where I 00:05:44.550 --> 00:05:48.310 think exams love to trap students. Fetal attitude. 00:05:48.629 --> 00:05:53.110 Oh yes, the attitude. When I hear attitude, I 00:05:53.110 --> 00:05:55.550 instantly picture a teenager rolling their eyes 00:05:55.550 --> 00:05:58.529 and slamming a door. Yeah. In obstetrics, what 00:05:58.529 --> 00:06:01.899 physically is fetal attitude. Fetal attitude 00:06:01.899 --> 00:06:04.480 refers to the relation of the fetal body parts 00:06:04.480 --> 00:06:06.360 to one another. Specifically, we are talking 00:06:06.360 --> 00:06:09.000 about the degree of flexion or extension of the 00:06:09.000 --> 00:06:11.339 fetal head and neck along the spine. Okay, so 00:06:11.339 --> 00:06:15.759 how tuck the chin is. Yes. The expected ideal 00:06:15.759 --> 00:06:19.319 attitude is complete tight flexion. The baby's 00:06:19.319 --> 00:06:21.439 chin is tucked firmly against their own chest, 00:06:21.800 --> 00:06:24.259 their arms are crossed over their thorax, and 00:06:24.259 --> 00:06:26.639 their knees are drawn up to their abdomen. Why 00:06:26.639 --> 00:06:28.740 is that chin tuck so critical though? Like, what 00:06:28.740 --> 00:06:31.620 does that do mechanically? It changes the diameter 00:06:31.620 --> 00:06:33.360 of the skull that has to fit through the bone 00:06:33.360 --> 00:06:35.860 of the maternal pelvis. Okay. When the chin is 00:06:35.860 --> 00:06:38.180 tucked, the baby is in a vertex presentation. 00:06:38.779 --> 00:06:41.800 This presents the suboccipito -brigmatic diameter 00:06:41.800 --> 00:06:44.220 of the skull. It's a mouthful. It is, but it 00:06:44.220 --> 00:06:46.459 basically means the absolute smallest possible 00:06:46.459 --> 00:06:48.420 circumference is presented to the pelvic inlet. 00:06:48.759 --> 00:06:51.839 It acts like a perfect wedge. I assume the concerning 00:06:51.839 --> 00:06:53.639 finding here is the opposite of flexion, right? 00:06:53.639 --> 00:06:57.399 Extension. It is highly concerning. If the fetal 00:06:57.399 --> 00:06:59.860 neck is extended, the baby is essentially looking 00:06:59.860 --> 00:07:02.540 straight up. This is a face presentation. Yikes. 00:07:02.740 --> 00:07:05.139 Yeah. Try tilting your head all the way back 00:07:05.139 --> 00:07:07.279 and imagine trying to push the front of your 00:07:07.279 --> 00:07:09.579 neck and your chin through a tight ring. No, 00:07:09.639 --> 00:07:12.100 thank you. Right. You are no longer presenting 00:07:12.100 --> 00:07:14.639 that narrow top of the head. You are presenting 00:07:14.639 --> 00:07:18.779 a much wider, awkward, elongated diameter. And 00:07:18.779 --> 00:07:21.240 from a nursing perspective, if a patient has 00:07:21.240 --> 00:07:24.589 a fetus with an attitude of extension, What is 00:07:24.589 --> 00:07:27.189 the actual clinical consequence? It makes it 00:07:27.189 --> 00:07:29.949 incredibly difficult, and often physically impossible, 00:07:30.129 --> 00:07:32.009 for the head to maneuver through the ischial 00:07:32.009 --> 00:07:34.589 spines of the maternal pelvis. Because it's too 00:07:34.589 --> 00:07:37.209 wide. Exactly. The bony structures will just 00:07:37.209 --> 00:07:40.089 grind to a halt. This results in a prolonged, 00:07:40.430 --> 00:07:42.990 exhausted labor, a complete failure to progress, 00:07:43.250 --> 00:07:45.689 and ultimately the need for a cesarean birth 00:07:45.689 --> 00:07:48.189 to save both patients. OK, so the passenger has 00:07:48.189 --> 00:07:50.709 to be tightly flexed and head down. But they 00:07:50.709 --> 00:07:52.810 also have to fit through the passage. That's 00:07:52.810 --> 00:07:55.350 the maternal pelvis. and the surrounding soft 00:07:55.350 --> 00:07:57.550 tissues of the pelvic floor. Yes, the second 00:07:57.550 --> 00:08:01.410 P. I read that premiparous clients like those 00:08:01.410 --> 00:08:04.389 having their first baby often have a much harder 00:08:04.389 --> 00:08:07.649 time with this specific P compared to multiparous 00:08:07.649 --> 00:08:10.069 clients. They absolutely do. The maternal pelvis 00:08:10.069 --> 00:08:13.250 is not just rigid bone, you know. It's heavily 00:08:13.250 --> 00:08:15.889 reliant on the ligaments and the soft tissues 00:08:15.889 --> 00:08:19.420 of the cervix and vagina. Right. In a primiparous 00:08:19.420 --> 00:08:22.339 patient, those soft tissues have never been stretched 00:08:22.339 --> 00:08:25.180 to this extreme capacity before. They are taught. 00:08:25.259 --> 00:08:27.939 So they fight back. Yeah. They provide intense 00:08:27.939 --> 00:08:30.379 resistance against the descending fetal head, 00:08:30.639 --> 00:08:33.220 which can really slow down the internal rotation 00:08:33.220 --> 00:08:35.419 the baby has to do to fit through the pelvic 00:08:35.419 --> 00:08:38.100 outlet. In someone who has had three babies, 00:08:38.440 --> 00:08:40.860 those tissues are much more yielding. Which makes 00:08:40.860 --> 00:08:43.500 the next two P's even more vital to overcome 00:08:43.500 --> 00:08:46.000 that resistance, right? Yeah. Power is in position. 00:08:46.080 --> 00:08:50.350 Yes. internal efforts. We have the primary powers, 00:08:50.610 --> 00:08:52.610 which are the involuntary uterine contractions, 00:08:52.870 --> 00:08:55.330 and the secondary powers, which are the voluntary 00:08:55.330 --> 00:08:57.549 pushing efforts of the mother. It's crucial to 00:08:57.549 --> 00:08:59.490 understand the mechanism of those primary powers, 00:08:59.909 --> 00:09:02.129 though. Contractions do not just squeeze the 00:09:02.129 --> 00:09:04.669 baby downward. Wait, really? I think most people 00:09:04.669 --> 00:09:07.210 picture it just like squeezing a tube of toothpaste. 00:09:07.529 --> 00:09:10.110 It's a common misconception. The muscle fibers 00:09:10.110 --> 00:09:12.409 of the upper uterus actually shorten and thicken 00:09:12.409 --> 00:09:15.610 with every contraction. They physically pull 00:09:15.610 --> 00:09:18.350 the lower uterine segment and the cervix upward 00:09:18.350 --> 00:09:21.730 over the baby's head. Oh, like pulling a turtleneck 00:09:21.730 --> 00:09:24.250 sweater over a head. That is the perfect analogy. 00:09:24.409 --> 00:09:26.809 That mechanical pulling is what actually causes 00:09:26.809 --> 00:09:29.250 the cervix to dilate and efface. In maternal 00:09:29.250 --> 00:09:33.549 position, the fourth P can either help or completely 00:09:33.549 --> 00:09:36.370 sabotage those powers. Like if a patient is lying 00:09:36.370 --> 00:09:39.149 flat on her back in a hospital bed, she is basically 00:09:39.149 --> 00:09:41.649 fighting gravity. Completely fighting it. The 00:09:41.649 --> 00:09:44.429 positioning of the client during labor is a direct, 00:09:44.909 --> 00:09:47.070 actionable nursing intervention. So what should 00:09:47.070 --> 00:09:49.769 nurses be doing? Changing positions, standing, 00:09:50.129 --> 00:09:52.309 kneeling, lunging, getting on hands and knees, 00:09:52.389 --> 00:09:55.250 or using a birthing ball. It dynamically changes 00:09:55.250 --> 00:09:57.649 the geometric shape of the maternal pelvis. It 00:09:57.649 --> 00:10:00.370 opens things up. Exactly. It opens the pelvic 00:10:00.370 --> 00:10:03.149 outlet and utilizes gravity to assist the fetus 00:10:03.149 --> 00:10:05.649 in rotating and descending. Research actually 00:10:05.649 --> 00:10:07.710 shows that frequent maternal position changes 00:10:07.710 --> 00:10:09.809 can actively shorten the first stage of labor 00:10:09.809 --> 00:10:12.389 by more than an hour. That's huge. Okay, and 00:10:12.389 --> 00:10:15.389 the final P is psyche, the maternal emotional 00:10:15.389 --> 00:10:19.279 state. I feel like this one... gets brushed off 00:10:19.279 --> 00:10:21.860 sometimes as just, hey, be nice to the patient. 00:10:22.200 --> 00:10:24.120 But it's actually a physiological mechanism, 00:10:24.259 --> 00:10:26.879 isn't it? Like, if a patient is terrified, their 00:10:26.879 --> 00:10:29.679 body physically fights the labor. It is a profound 00:10:29.679 --> 00:10:32.360 biochemical reaction. If a patient experiences 00:10:32.360 --> 00:10:35.940 intense fear, anxiety, or lack of support, their 00:10:35.940 --> 00:10:37.860 sympathetic nervous system activates. That's 00:10:37.860 --> 00:10:39.980 why they're a flight response. Exactly. Their 00:10:39.980 --> 00:10:43.080 adrenal glands dump massive amounts of catecholamines 00:10:43.080 --> 00:10:45.419 epinephrine and norepinephrine into their bloodstream. 00:10:45.480 --> 00:10:47.500 And what does that do to the uterus? Epinephrine 00:10:47.529 --> 00:10:49.789 binds to beta receptors in the smooth muscle 00:10:49.789 --> 00:10:52.149 of the uterus, which actually relaxes the muscle 00:10:52.149 --> 00:10:55.429 and halts the contractions. Wow. From an evolutionary 00:10:55.429 --> 00:10:57.830 standpoint, if a predator is attacking, the body 00:10:57.830 --> 00:10:59.990 shuts down labor so the mother can run away. 00:11:00.169 --> 00:11:03.750 That makes total sense biologically. Right. So... 00:11:03.549 --> 00:11:06.490 The nurse's role in providing support, reducing 00:11:06.490 --> 00:11:09.649 anxiety, managing pain, and welcoming care partners 00:11:09.649 --> 00:11:13.190 is not just a customer service initiative. It 00:11:13.190 --> 00:11:16.330 is a vital physiological intervention to keep 00:11:16.330 --> 00:11:18.549 the primary powers functioning. OK, so we have 00:11:18.549 --> 00:11:21.509 the five P's, passenger, passage, powers, position, 00:11:21.850 --> 00:11:25.009 psyche. Got them. Clinically, you will constantly 00:11:25.009 --> 00:11:28.029 be asked to triage patients who come into the 00:11:28.029 --> 00:11:30.889 hospital reporting that they're in excruciating 00:11:30.889 --> 00:11:33.029 pain and claiming they are in labor. Happens 00:11:33.029 --> 00:11:34.909 all the time. And this is where the physiology 00:11:34.909 --> 00:11:37.570 of the uterus becomes a massive liability because 00:11:37.570 --> 00:11:39.929 you have to differentiate between true labor 00:11:39.929 --> 00:11:42.909 and false labor. Yes, the triage dilemma. If 00:11:42.909 --> 00:11:45.129 I send a true labor patient home, I have committed 00:11:45.129 --> 00:11:47.950 a massive safety violation. If I admit a false 00:11:47.950 --> 00:11:50.169 labor patient, I'm setting them up for a cascade 00:11:50.169 --> 00:11:53.070 of unnecessary medical interventions. So what 00:11:53.070 --> 00:11:55.860 is the undeniable gold standard metric to tell 00:11:55.860 --> 00:11:58.440 the difference. Cervical change, period. Just 00:11:58.440 --> 00:12:01.700 that one thing. Yes. True labor is defined by 00:12:01.700 --> 00:12:05.519 one absolute objective metric. Progressive cervical 00:12:05.519 --> 00:12:09.039 dilation and effacement caused by uterine contractions, 00:12:09.379 --> 00:12:11.820 those contractions must progressively increase 00:12:11.820 --> 00:12:15.059 in frequency, duration, and intensity. But what 00:12:15.059 --> 00:12:18.149 about Braxton -Hicks contractions? Because they 00:12:18.149 --> 00:12:20.950 feel incredibly real to the patient. Why do they 00:12:20.950 --> 00:12:23.370 happen if they aren't actually dilating the cervix? 00:12:23.529 --> 00:12:26.149 Well, Braxton -Hicks contractions are localized 00:12:26.149 --> 00:12:29.309 spasms of the uterine muscle fibers. They are 00:12:29.309 --> 00:12:32.169 essentially the uterus practicing or toning its 00:12:32.169 --> 00:12:33.830 muscle throughout the pregnancy. They're ready 00:12:33.830 --> 00:12:36.429 for the big day. Exactly. They are often triggered 00:12:36.429 --> 00:12:39.590 by dehydration, a full bladder, or physical activity. 00:12:39.950 --> 00:12:42.970 But they lack the organized, downward -sweeping 00:12:42.970 --> 00:12:45.570 electrical pacing of true labor. So they don't 00:12:45.570 --> 00:12:47.610 do the turtleneck pulling? No, they don't. They 00:12:47.610 --> 00:12:50.029 occur randomly. They don't increase in intensity. 00:12:50.190 --> 00:12:52.009 And most importantly, they do not possess the 00:12:52.009 --> 00:12:53.950 mechanical force required to pull the cervix 00:12:53.950 --> 00:12:56.149 open. So how does the nurse differentiate them 00:12:56.149 --> 00:12:59.509 during an assessment? With true labor, the contractions 00:12:59.509 --> 00:13:02.470 usually originate in the lower back, radiate 00:13:02.470 --> 00:13:05.269 around to the lower abdomen, and feel like intense 00:13:05.269 --> 00:13:09.029 deep menstrual cramping. But the definitive differentiator 00:13:09.029 --> 00:13:13.110 is the response to intervention. True labor contractions 00:13:13.110 --> 00:13:16.049 are relentless. They do not stop with rest. They 00:13:16.049 --> 00:13:18.210 do not stop with hydration. And they do not stop 00:13:18.210 --> 00:13:20.970 if you walk around. They keep coming. And false 00:13:20.970 --> 00:13:23.769 labor. False labor contractions are often described 00:13:23.769 --> 00:13:26.570 as mild cramps or just an uncomfortable tightening 00:13:26.570 --> 00:13:29.129 across the top of the belly. And they will typically 00:13:29.129 --> 00:13:31.870 fade away if the patient lies down, drinks a 00:13:31.870 --> 00:13:34.450 large glass of water, or takes a warm shower. 00:13:34.789 --> 00:13:36.950 I actually use an analogy for this. Oh, let's 00:13:36.950 --> 00:13:41.590 hear it. I compare. false labor to a car engine 00:13:41.590 --> 00:13:44.210 revving while the transmission is in neutral. 00:13:44.669 --> 00:13:46.629 You hear a lot of noise. You feel the engine 00:13:46.629 --> 00:13:49.070 vibrating. The car is definitely doing something. 00:13:49.169 --> 00:13:51.690 But you're not going anywhere. Exactly. The wheels 00:13:51.690 --> 00:13:53.549 aren't turning. You aren't moving an inch forward. 00:13:53.789 --> 00:13:56.590 That's false labor. No forward progress. No cervical 00:13:56.590 --> 00:13:59.629 change. I love that. True labor is when you shift 00:13:59.629 --> 00:14:03.169 that car into drive. Every single rev of the 00:14:03.169 --> 00:14:05.580 engine moves you closer to the destination. That 00:14:05.580 --> 00:14:08.039 perfectly captures the mechanics. So putting 00:14:08.039 --> 00:14:10.340 on my nursing student hat, let me throw an exam 00:14:10.340 --> 00:14:12.419 scenario at you. Bring it on. A patient comes 00:14:12.419 --> 00:14:15.279 into triage. She is crying, she is clutching 00:14:15.279 --> 00:14:17.480 her abdomen, and she states her contractions 00:14:17.480 --> 00:14:20.590 are a 10 out of 10 on the pain scale. She must 00:14:20.590 --> 00:14:23.110 be in true labor, right? We need to admit her 00:14:23.110 --> 00:14:25.649 immediately. That is one of the most common traps 00:14:25.649 --> 00:14:29.370 on the NCLEX and in real life. Do not ever assume 00:14:29.370 --> 00:14:32.070 that intense pain equals true labor. Why not? 00:14:32.070 --> 00:14:34.809 She's at a 10 out of 10. Because pain is entirely 00:14:34.809 --> 00:14:37.409 subjective and heavily influenced by that fifth 00:14:37.409 --> 00:14:40.850 P, psyche. Severe anxiety can make a Braxton 00:14:40.850 --> 00:14:43.870 Hicks contraction feel agonizing, but the nurse 00:14:43.870 --> 00:14:46.269 cannot admit a patient based on a pain score 00:14:46.269 --> 00:14:49.009 alone. Right. The only objective finding that 00:14:49.009 --> 00:14:51.970 confirms true labor is cervical change. You must 00:14:51.970 --> 00:14:54.730 perform a sterile vaginal exam. If her cervix 00:14:54.730 --> 00:14:56.990 was two centimeters yesterday at her clinic appointment, 00:14:57.029 --> 00:14:59.090 and you check her in triage today, and it's still 00:14:59.090 --> 00:15:00.950 two centimeters. Despite her being in 10 out 00:15:00.950 --> 00:15:03.769 of 10 pain. Exactly. She is not in true labor. 00:15:03.789 --> 00:15:06.289 The engine is just revving in neutral. Yep. Okay, 00:15:06.289 --> 00:15:08.409 so if we're pulling the, if you only remember 00:15:08.409 --> 00:15:11.490 five things for this first topic, what are the 00:15:11.490 --> 00:15:13.370 takeaways that will keep a future nurse safe 00:15:13.370 --> 00:15:16.409 on the floor? Number one, true labor creates 00:15:16.409 --> 00:15:19.269 cervical dilation and effacement. Number two, 00:15:19.710 --> 00:15:22.029 false labor stops with rest and hydration. True 00:15:22.029 --> 00:15:25.490 labor does not. Right. Number three, the ideal 00:15:25.490 --> 00:15:28.610 fetal attitude is complete flexion. The vertex 00:15:28.610 --> 00:15:31.669 presentation. Number four, maternal position 00:15:31.669 --> 00:15:34.289 changes actively shorten the first stage of labor. 00:15:34.909 --> 00:15:38.409 And number five, the five P's must work in harmony 00:15:38.409 --> 00:15:41.639 for a successful vaginal birth. That is the foundation 00:15:41.639 --> 00:15:44.019 of obstetric triage right there. Absolutely. 00:15:44.179 --> 00:15:46.600 So let's say we've done our triage. The contractions 00:15:46.600 --> 00:15:48.820 are regular, the engine is in drive, and the 00:15:48.820 --> 00:15:51.179 cervix is actively transforming. We know the 00:15:51.179 --> 00:15:53.240 patient is in true labor. Okay, we're admitting 00:15:53.240 --> 00:15:56.659 her. Now, we need to physically measure that 00:15:56.659 --> 00:15:58.940 progress in detail, and we need to check the 00:15:58.940 --> 00:16:00.539 environment the baby is currently living in. 00:16:00.759 --> 00:16:03.340 How do we track the physical descent? This requires 00:16:03.340 --> 00:16:06.139 a highly systematic physical assessment. When 00:16:06.139 --> 00:16:08.779 a nurse performs a sterile vaginal cervical exam, 00:16:08.980 --> 00:16:10.879 they are not just checking one thing. They are 00:16:10.879 --> 00:16:13.659 measuring three specific distinct data points. 00:16:13.840 --> 00:16:16.379 Which are? Dilation, the facement, and station. 00:16:16.860 --> 00:16:18.539 Let's break down the mechanics of each. Okay, 00:16:18.580 --> 00:16:21.360 let's start with dilation. Dilation is the widening 00:16:21.360 --> 00:16:24.080 of the internal cervical opening. We measure 00:16:24.080 --> 00:16:26.200 this subjectively with our fingers in centimeters 00:16:26.200 --> 00:16:29.340 from 0 to 10. Zero means the cervix is completely 00:16:29.340 --> 00:16:32.629 closed. 10 centimeters is fully dilated. Well, 00:16:32.730 --> 00:16:34.610 what does 10 centimeters actually feel like? 00:16:34.710 --> 00:16:37.269 Like, do you just feel a giant hole? Actually, 00:16:37.370 --> 00:16:39.490 at 10 centimeters, you essentially feel nothing. 00:16:39.769 --> 00:16:42.350 Nothing. Right. The cervix is completely retracted 00:16:42.350 --> 00:16:44.549 up and around the fetal head. When you sweep 00:16:44.549 --> 00:16:46.289 your fingers around the presenting part, you 00:16:46.289 --> 00:16:48.590 should not be able to palpate any cervical lip. 00:16:48.730 --> 00:16:50.750 And if you do feel a lip? If you can still feel 00:16:50.750 --> 00:16:54.500 a rim of tissue, even just a tiny piece. She 00:16:54.500 --> 00:16:56.539 is not 10 centimeters, and she should not start 00:16:56.539 --> 00:16:58.879 pushing yet. Why is pushing early so dangerous? 00:16:59.039 --> 00:17:01.179 If she pushes against an undilated cervix, it 00:17:01.179 --> 00:17:03.919 can swell, tear, or hemorrhage. It's a huge safety 00:17:03.919 --> 00:17:06.059 issue. OK. That makes sense. Wait until it's 00:17:06.059 --> 00:17:08.059 completely out of the way. And then we have a 00:17:08.059 --> 00:17:10.200 facement, which is the thinning of the cervix. 00:17:10.940 --> 00:17:15.619 A normal non -laboring cervix is a thick muscular 00:17:15.619 --> 00:17:19.119 tube, right? Like about 2 .5 to 3 centimeters 00:17:19.119 --> 00:17:21.599 long? Correct. How does it just vanish? It's 00:17:21.599 --> 00:17:24.930 an enzymatic and mechanical process. Prostaglandins 00:17:24.930 --> 00:17:27.529 break down the collagen network within the cervix, 00:17:27.789 --> 00:17:30.549 softening it. Then, as the longitudinal muscle 00:17:30.549 --> 00:17:33.049 fibers of the uterus contract, they physically 00:17:33.049 --> 00:17:36.529 pull the internal cervical us upward. The turtleneck 00:17:36.529 --> 00:17:39.069 again? Yes. The cervix shortens and thins out. 00:17:39.279 --> 00:17:42.380 We measure this in percentages. So 0 % of faced 00:17:42.380 --> 00:17:45.380 means the cervix is still its original thick 00:17:45.380 --> 00:17:49.160 three centimeter self. 50 % means it has thinned 00:17:49.160 --> 00:17:52.279 to about half its length. And 100 % of faced 00:17:52.279 --> 00:17:54.980 means the cervix is completely paper thin, like 00:17:54.980 --> 00:17:57.140 a tight rubber band stretched around the baby's 00:17:57.140 --> 00:18:00.170 head. And the third measurement is station. This 00:18:00.170 --> 00:18:02.170 measures the descent of the fetal presenting 00:18:02.170 --> 00:18:05.009 part through the maternal pelvis. The landmark 00:18:05.009 --> 00:18:07.690 we use here is the maternal ischal spines. Right. 00:18:07.869 --> 00:18:10.430 The ischal spines are two bony prominences that 00:18:10.430 --> 00:18:13.289 jut inward into the pelvic cavity. They represent 00:18:13.289 --> 00:18:15.470 the narrowest diameter of the pelvic outlet. 00:18:15.569 --> 00:18:17.450 Okay, I have to push back on the numbering system 00:18:17.450 --> 00:18:19.769 for station because it is universally confusing 00:18:19.769 --> 00:18:22.230 for states. It trips everyone up. Station is 00:18:22.230 --> 00:18:24.289 measured from negative five to positive five. 00:18:24.529 --> 00:18:27.839 It feels completely backwards. If the baby is 00:18:27.839 --> 00:18:30.099 high up in the pelvis, shouldn't that be a positive 00:18:30.099 --> 00:18:32.619 number? Why do negative numbers mean the baby 00:18:32.619 --> 00:18:34.839 is high up, while positive numbers mean they 00:18:34.839 --> 00:18:38.319 are closer to coming out? It is entirely counterintuitive 00:18:38.319 --> 00:18:41.059 until you reframe how you look at the pelvis. 00:18:41.140 --> 00:18:43.579 Okay, reframe it for me. Think of the ischial 00:18:43.579 --> 00:18:47.880 spines, that narrowest bony choke point, as the 00:18:47.880 --> 00:18:50.359 zero point. They are the tollbooth on the highway 00:18:50.359 --> 00:18:52.980 to birth. The tollbooth, okay. Everything is 00:18:52.980 --> 00:18:55.279 measured relative to that toll booth. If the 00:18:55.279 --> 00:18:57.660 baby's head is high up in the abdomen above the 00:18:57.660 --> 00:19:00.200 ischal spines, they haven't reached the toll 00:19:00.200 --> 00:19:02.539 booth yet. They're in the negative zone. Ah, 00:19:02.819 --> 00:19:04.740 so they have a negative moment progress. Exactly. 00:19:04.900 --> 00:19:07.640 Negative three, negative two, negative one. They 00:19:07.640 --> 00:19:10.240 are approaching, but they are not engaged in 00:19:10.240 --> 00:19:12.640 the tightest part of the pelvis. OK, so zero 00:19:12.640 --> 00:19:15.990 station means? Zero station means the absolute 00:19:15.990 --> 00:19:18.470 widest part of the fetal head is exactly level 00:19:18.470 --> 00:19:21.269 with those bony ischial spines. The head is officially 00:19:21.269 --> 00:19:23.190 engaged. They are at the toll booth. And once 00:19:23.190 --> 00:19:25.740 they pass the toll booth. Then they are making 00:19:25.740 --> 00:19:27.900 positive progress toward the outside world. Plus 00:19:27.900 --> 00:19:30.500 one, plus two, plus three. By the time they reach 00:19:30.500 --> 00:19:33.339 plus four or plus five, the head is crowning 00:19:33.339 --> 00:19:35.420 at the vaginal opening. OK, so a great memory 00:19:35.420 --> 00:19:39.859 anchor for this is negative is nowhere near positive 00:19:39.859 --> 00:19:42.700 is popping out. That is brilliant. Yes. Negative 00:19:42.700 --> 00:19:45.680 is nowhere near positive is popping out. So on 00:19:45.680 --> 00:19:49.259 a chart, if a provider writes an exam as 581. 00:19:49.349 --> 00:19:52.890 That translates to the cervix is 5 centimeters 00:19:52.890 --> 00:19:55.910 dilated, it is 80 percent effaced, and the baby's 00:19:55.910 --> 00:19:58.269 head is 1 centimeter above the eschal spines. 00:19:58.430 --> 00:20:00.730 You've got it. Now, alongside the cervical exam, 00:20:01.329 --> 00:20:03.710 the nurse must assess the status of the amniotic 00:20:03.710 --> 00:20:06.609 membranes. The water breaking. Right. The amniotic 00:20:06.609 --> 00:20:08.910 sac is a balloon of fluid surrounding the baby. 00:20:09.099 --> 00:20:11.599 Sometimes it ruptures spontaneously during labor. 00:20:12.200 --> 00:20:14.180 Other times, the provider will use a plastic 00:20:14.180 --> 00:20:17.180 hook to perform an amniotomy to artificially 00:20:17.180 --> 00:20:19.400 rupture the membranes and speed up labor. Either 00:20:19.400 --> 00:20:21.759 way, the exact second those membranes rupture, 00:20:22.019 --> 00:20:24.359 the entire clinical picture shifts and the nurse's 00:20:24.359 --> 00:20:26.779 priority changes instantly. Let's explain the 00:20:26.779 --> 00:20:29.920 why behind that shift. Why is a ruptured membrane 00:20:29.920 --> 00:20:32.619 such a massive turning point? Because the amniotic 00:20:32.619 --> 00:20:36.160 sac is a sterile physical barrier, it protects 00:20:36.160 --> 00:20:38.660 the highly vulnerable sterile fetus from the 00:20:38.660 --> 00:20:41.160 outside world, specifically the bacterial flora 00:20:41.160 --> 00:20:44.460 of the vagina. Once that sac ruptures, the barrier 00:20:44.460 --> 00:20:47.700 is gone. A direct pathway to the fetus is open, 00:20:47.980 --> 00:20:51.079 and a biological clock starts ticking on infection. 00:20:51.559 --> 00:20:53.420 And what about the physical mechanics of the 00:20:53.420 --> 00:20:56.819 fluid leaving? That's the other huge risk. The 00:20:56.819 --> 00:20:59.400 sudden, massive rush of fluid flowing out of 00:20:59.400 --> 00:21:02.599 the uterus creates a physical current. That current 00:21:02.599 --> 00:21:05.279 can actually sweep the umbilical cord down past 00:21:05.279 --> 00:21:08.259 the baby's head, trapping it. So let's talk about 00:21:08.259 --> 00:21:09.980 the fluid itself. What are we looking for? What 00:21:09.980 --> 00:21:12.359 are the expected versus concerning findings when 00:21:12.359 --> 00:21:14.539 the water breaks? Expected findings are pretty 00:21:14.539 --> 00:21:16.980 straightforward. The amniotic fluid should be 00:21:16.980 --> 00:21:19.980 mostly clear, maybe slightly cloudy. You might 00:21:19.980 --> 00:21:22.000 see small white flecks floating in it, which 00:21:22.000 --> 00:21:24.400 is vernix, the protective cheese -like coating 00:21:24.400 --> 00:21:27.700 on the baby's skin. It has a very thin, watery 00:21:27.700 --> 00:21:31.420 consistency and a very slight fleshy or musty 00:21:31.420 --> 00:21:34.829 odor. It shouldn't smell repulsive. And the priority 00:21:34.829 --> 00:21:37.109 concerning findings, the things that require 00:21:37.109 --> 00:21:40.589 immediate escalation. First is color. If the 00:21:40.589 --> 00:21:44.289 fluid is green, yellow, or a dark, thick, brownish 00:21:44.289 --> 00:21:46.829 green, that is a massive red flag. Why? That 00:21:46.829 --> 00:21:49.690 indicates the fetus has passed meconium in utero. 00:21:49.930 --> 00:21:52.130 Meconium is the baby's first bowel movement, 00:21:52.150 --> 00:21:54.349 right? Yeah. It's usually this thick, sticky, 00:21:54.569 --> 00:21:57.190 black tar. Why is it so dangerous if it's floating 00:21:57.190 --> 00:22:00.099 in the fluid? Because the baby is breathing that 00:22:00.099 --> 00:22:02.779 fluid in and out of their lungs to practice respiration. 00:22:03.220 --> 00:22:05.819 If the fluid is full of thick, sticky meconium, 00:22:06.160 --> 00:22:09.099 the baby draws that tar deep into their alveolar 00:22:09.099 --> 00:22:12.480 spaces. When they are born and take their first 00:22:12.480 --> 00:22:15.460 breath of air, that meconium physically plugs 00:22:15.460 --> 00:22:18.539 the airways and chemically deactivates the surfactant 00:22:18.539 --> 00:22:21.700 in their lungs. It causes severe chemical pneumonitis, 00:22:21.819 --> 00:22:23.920 known as meconium aspiration syndrome. It can 00:22:23.920 --> 00:22:26.819 be fatal. And what causes the baby to pass meconium 00:22:26.819 --> 00:22:29.319 before birth anyway? It is almost always a sign 00:22:29.319 --> 00:22:31.839 of fetal stress. Often, it's chronic hypoxia. 00:22:31.940 --> 00:22:35.059 Lack of oxygen. Right. When the fetus doesn't 00:22:35.059 --> 00:22:38.400 get enough oxygen, their autonomic nervous system 00:22:38.400 --> 00:22:42.000 triggers a vagal response. Blood is shunted away 00:22:42.000 --> 00:22:44.619 from the gut to protect the brain, the intestinal 00:22:44.619 --> 00:22:47.539 peristalsis increases, and the anal sphincter 00:22:47.539 --> 00:22:50.200 relaxes, dumping the meconium into the fluid. 00:22:50.380 --> 00:22:53.559 Okay, so green fluid is a major aspiration and 00:22:53.559 --> 00:22:56.099 hypoxia risk. What else are we looking for? Odor. 00:22:56.579 --> 00:22:59.319 If the fluid has a foul, purulent, or rotten 00:22:59.319 --> 00:23:03.980 odor, it screams infection. Specifically, chorioamnonitis, 00:23:04.400 --> 00:23:06.740 an infection of the chorion and amnion layers 00:23:06.740 --> 00:23:09.480 of the sac. Makes sense. And finally, you must 00:23:09.480 --> 00:23:11.400 assess the station of the baby when the water 00:23:11.400 --> 00:23:14.119 breaks. If the membranes rupture while the baby 00:23:14.119 --> 00:23:16.460 is floating high up at a negative three station, 00:23:16.819 --> 00:23:18.859 there is a massive volume of fluid beneath the 00:23:18.859 --> 00:23:20.839 head. So when that breaks? When that fluid rushes 00:23:20.839 --> 00:23:23.000 out, it's highly likely to wash the umbilical 00:23:23.000 --> 00:23:25.380 cord down into the vagina. Which leads us directly 00:23:25.380 --> 00:23:28.259 to the most critical NCLEX and clinical priority 00:23:28.259 --> 00:23:30.440 question for this entire topic. Oh, this is the 00:23:30.440 --> 00:23:32.859 big one. A patient is laboring. She suddenly 00:23:32.859 --> 00:23:36.200 says, I just felt a pop and a huge gush of fluid. 00:23:36.970 --> 00:23:39.869 What is the very first immediate action the nurse 00:23:39.869 --> 00:23:42.890 must take? Do you grab towels to clean her up? 00:23:43.150 --> 00:23:44.809 Do you look at the fluid color? Do you check 00:23:44.809 --> 00:23:47.509 her temperature? No, you do absolutely none of 00:23:47.509 --> 00:23:49.430 those things first. Okay, what do you do? The 00:23:49.430 --> 00:23:52.750 very first absolute non -negotiable priority 00:23:52.750 --> 00:23:55.859 action is to assess the fetal heart rate. You 00:23:55.859 --> 00:23:58.359 must immediately look at the monitor and check 00:23:58.359 --> 00:24:01.779 the FHR. Because of the cord? Yes. If that rushing 00:24:01.779 --> 00:24:04.900 fluid swept the umbilical cord down, the heavy 00:24:04.900 --> 00:24:07.819 bony head of the fetus is going to slam down 00:24:07.819 --> 00:24:10.420 onto the pelvic bone, completely crushing the 00:24:10.420 --> 00:24:12.880 cord between them. Cutting off the blood? Exactly. 00:24:13.380 --> 00:24:15.380 Blood flow from the placenta to the baby will 00:24:15.380 --> 00:24:17.940 stop instantly. If that happens, the fetal heart 00:24:17.940 --> 00:24:20.740 rate will plummet. You will see a sudden, profound 00:24:20.740 --> 00:24:23.579 bradycardia or severe variable deceleration. 00:24:24.140 --> 00:24:26.539 Wow. Assessing the FHR is the only way you can 00:24:26.539 --> 00:24:29.200 instantly rule out a prolapsed cord. Once you 00:24:29.200 --> 00:24:31.140 confirm the heart rate is stable, then you can 00:24:31.140 --> 00:24:32.900 look at the color of the fluid and grab the towels. 00:24:33.359 --> 00:24:36.119 Assess the heart rate first. Always. Once that's 00:24:36.119 --> 00:24:37.960 done, you mention the ticking clock on infection. 00:24:38.319 --> 00:24:41.299 How does our vital sign protocol change? Before 00:24:41.299 --> 00:24:43.579 rupture, you might check a maternal temperature 00:24:43.579 --> 00:24:46.339 every four hours. The moment the membranes rupture, 00:24:46.700 --> 00:24:48.720 that changes to every two hours. Because the 00:24:48.720 --> 00:24:51.059 sterile seal is broken. Exactly. You are hunting 00:24:51.059 --> 00:24:54.339 for the earliest signs of chorioamnionitis, maternal 00:24:54.339 --> 00:24:57.940 fever, fetal tachycardia, a tender uterus, or 00:24:57.940 --> 00:25:00.519 foul -smelling fluid. And speaking of infection, 00:25:00.960 --> 00:25:04.059 This is where Group B streptococcus, or GBS, 00:25:04.279 --> 00:25:06.920 becomes a critical factor. The guidelines state 00:25:06.920 --> 00:25:09.339 that all pregnant clients should be swabbed and 00:25:09.339 --> 00:25:13.640 tested for GBS between 36 and 37 weeks gestation. 00:25:13.920 --> 00:25:16.500 Yes, standard prenatal care. But if GBS is just 00:25:16.500 --> 00:25:18.799 a normal bacteria, why is it such a high priority? 00:25:19.000 --> 00:25:21.339 because of the massive difference between maternal 00:25:21.339 --> 00:25:24.579 and fetal immune systems. GBS is a naturally 00:25:24.579 --> 00:25:27.180 occurring bacterium that lives in the lower GI 00:25:27.180 --> 00:25:30.000 or genital tract of about 25 % of healthy women. 00:25:30.160 --> 00:25:32.259 So the mom is totally fine. To an adult with 00:25:32.259 --> 00:25:34.960 a mature immune system and intact mucosal barriers, 00:25:35.019 --> 00:25:36.619 it is completely harmless. They don't even know 00:25:36.619 --> 00:25:39.839 they have it. But a fetus has a naive, immature 00:25:39.839 --> 00:25:43.420 immune system. They have no IgG or IgA antibodies 00:25:43.420 --> 00:25:45.890 to fight it. So if they are exposed during birth? 00:25:46.130 --> 00:25:49.210 If a baby inhales or swallows GBS bacteria as 00:25:49.210 --> 00:25:51.690 they slide through the birth canal, the bacteria 00:25:51.690 --> 00:25:54.109 rapidly invades their bloodstream and lungs. 00:25:54.450 --> 00:25:57.589 It causes devastating neonatal sepsis, pneumonia, 00:25:57.869 --> 00:26:00.839 and meningitis within hours of birth. So what 00:26:00.839 --> 00:26:02.700 is the nursing intervention? I mean, we can't 00:26:02.700 --> 00:26:05.660 just sterilize the birth canal. No, we use targeted 00:26:05.660 --> 00:26:08.700 pharmacology. The priority intervention is administering 00:26:08.700 --> 00:26:11.980 prophylactic intravenous antibiotics, usually 00:26:11.980 --> 00:26:14.500 penicillin G or ampicillin to the mother during 00:26:14.500 --> 00:26:16.819 labor. To the mother, not the baby. Right. We 00:26:16.819 --> 00:26:19.200 want the antibiotic in the mother's bloodstream 00:26:19.200 --> 00:26:22.039 so it crosses the placenta and builds up therapeutic 00:26:22.039 --> 00:26:24.240 levels in the fetal bloodstream before they pass 00:26:24.240 --> 00:26:26.160 through the canal. What if a patient comes in 00:26:26.160 --> 00:26:28.960 in active labor and they had no prenatal care 00:26:28.960 --> 00:26:31.180 so we don't know their GBS status? You treat 00:26:31.180 --> 00:26:33.359 them prophylactically if they have specific clinical 00:26:33.359 --> 00:26:35.980 risk factors. If their water has been broken 00:26:35.980 --> 00:26:38.180 for more than 18 hours, if they have a fever 00:26:38.180 --> 00:26:41.200 over 100 .4, or if they are in preterm labor 00:26:41.200 --> 00:26:44.720 before 37 weeks, you hang the antibiotics. The 00:26:44.720 --> 00:26:47.690 risk of untreated GBS sepsis far outweighs the 00:26:47.690 --> 00:26:50.390 risk of the antibiotic. Okay, one more clinical 00:26:50.390 --> 00:26:52.690 scenario on this topic. Right. A patient comes 00:26:52.690 --> 00:26:55.630 into triage complaining of wet underwear. She 00:26:55.630 --> 00:26:57.829 thinks her water broke, but she's not sure. Happens 00:26:57.829 --> 00:27:00.849 every day. Right. Maybe it's just urine or maybe 00:27:00.849 --> 00:27:03.390 it's just a heavy vaginal discharge common in 00:27:03.390 --> 00:27:06.269 late pregnancy. How does the nurse definitively 00:27:06.269 --> 00:27:09.230 prove it's amniotic fluid? We rely on chemistry, 00:27:09.710 --> 00:27:12.390 specifically pH levels. The nurse will perform 00:27:12.390 --> 00:27:15.230 a nitrazine test. How does that work? Normal 00:27:15.230 --> 00:27:18.069 vaginal secretions are highly acidic, maintaining 00:27:18.069 --> 00:27:22.470 a pH of around 4 .5 to 6 .2. This acidity is 00:27:22.470 --> 00:27:25.369 created by lactobacilli bacteria producing lactic 00:27:25.369 --> 00:27:28.769 acid to prevent infections. Amniotic fluid, however, 00:27:28.910 --> 00:27:31.809 is mostly composed of fetal urine and lung secretions. 00:27:32.130 --> 00:27:35.509 It is strictly alkaline, with a pH of 7 .1 to 00:27:35.509 --> 00:27:38.289 7 .3. So you take a strip of nitrazine paper, 00:27:38.349 --> 00:27:41.009 which is pH sensitive, and you touch it to the 00:27:41.009 --> 00:27:43.480 fluid pooling in the vagina. Exactly. If the 00:27:43.480 --> 00:27:45.700 fluid is acidic vaginal discharge, the paper 00:27:45.700 --> 00:27:48.319 stays yellow or olive green. But if the fluid 00:27:48.319 --> 00:27:51.059 is alkaline amniotic fluid, the paper will instantly 00:27:51.059 --> 00:27:53.359 turn a deep dark blue. So blue means broken. 00:27:53.720 --> 00:27:57.640 Yes. A blue strip confirms rupture of membranes. 00:27:57.859 --> 00:28:00.319 You can also take a swab of the fluid, smear 00:28:00.319 --> 00:28:03.000 it on a glass slide, and look at it under a microscope. 00:28:03.630 --> 00:28:06.690 As amniotic fluid dries, the sodium chloride 00:28:06.690 --> 00:28:09.349 in it crystallizes into a beautiful distinct 00:28:09.349 --> 00:28:11.609 pattern that looks exactly like a fern leaf. 00:28:11.670 --> 00:28:14.390 That's called a positive fern test. But exams 00:28:14.390 --> 00:28:16.990 love to test the limitations of diagnostic tools. 00:28:17.690 --> 00:28:20.529 Is there a trap with the nitrazine paper? A major 00:28:20.529 --> 00:28:23.549 one. Nitrazine paper can give you a false positive. 00:28:23.569 --> 00:28:26.170 You cannot trust it blindly. Why? Because there 00:28:26.170 --> 00:28:28.230 are other alkaline substances that can be present 00:28:28.230 --> 00:28:31.250 in the vagina. Blood is alkaline, semen is alkaline, 00:28:31.329 --> 00:28:33.319 even some types of bacteria. bacterial infections 00:28:33.319 --> 00:28:36.940 alter the pH. If the patient recently had intercourse, 00:28:37.140 --> 00:28:38.859 or if she is bleeding slightly from cervical 00:28:38.859 --> 00:28:41.559 dilation, the paper will turn blue, even if the 00:28:41.559 --> 00:28:44.039 amniotic sac is perfectly intact. The nurse must 00:28:44.039 --> 00:28:46.799 assess the whole clinical picture. OK, so let's 00:28:46.799 --> 00:28:49.099 synthesize this. If we only remember five things 00:28:49.099 --> 00:28:51.099 about assessing progress in fluid, what are they? 00:28:51.339 --> 00:28:54.000 One, station zero means the fetal head is engaged 00:28:54.000 --> 00:28:57.339 at the ischal spines. Two, always, always check 00:28:57.339 --> 00:28:59.779 the FHR immediately after membranes rupture. 00:29:00.140 --> 00:29:03.380 All right, three. Meconine stained or green fluid 00:29:03.380 --> 00:29:06.680 is a major aspiration risk. Four, temp checks 00:29:06.680 --> 00:29:09.500 become every two hours post rupture due to infection 00:29:09.500 --> 00:29:13.420 risk. And five, GBS positive means antibiotics 00:29:13.420 --> 00:29:16.680 during labor. Awesome. That is exactly how a 00:29:16.680 --> 00:29:19.359 safe nurse prioritizes their assessment. Exactly. 00:29:19.400 --> 00:29:21.640 So the cervix is opening, the water is broken, 00:29:21.920 --> 00:29:25.519 and we've ruled out a cord prolapse. But labor 00:29:25.519 --> 00:29:28.819 is a marathon. To faithfully monitor the baby 00:29:28.819 --> 00:29:31.839 going forward, we need to know exactly how they 00:29:31.839 --> 00:29:34.279 are positioned inside the uterus, and we need 00:29:34.279 --> 00:29:36.500 to evaluate the strength and frequency of the 00:29:36.500 --> 00:29:38.619 maternal contractions. We need to monitor the 00:29:38.619 --> 00:29:41.140 engine. Right. How do we ensure we are getting 00:29:41.140 --> 00:29:44.140 accurate data? Accurate data relies entirely 00:29:44.140 --> 00:29:46.359 on the correct placement of our sensors, and 00:29:46.359 --> 00:29:48.359 you cannot place the sensors correctly if you 00:29:48.359 --> 00:29:51.039 don't know the physical layout of the fetus inside 00:29:51.039 --> 00:29:54.119 the abdomen. To map that out, the nurse performs 00:29:54.119 --> 00:29:56.200 the Leopold maneuvers. Why not just wheel in 00:29:56.200 --> 00:29:58.059 an ultrasound machine? Why are we using our hands? 00:29:58.220 --> 00:30:01.160 An ultrasound is definitive, yes. But in a busy 00:30:01.160 --> 00:30:03.420 triage unit, you don't always have an ultrasound 00:30:03.420 --> 00:30:05.640 tech instantly available, and you need to get 00:30:05.640 --> 00:30:07.700 the fetal heart rate on the monitor immediately. 00:30:08.059 --> 00:30:10.859 The Leopold maneuvers are a highly tested four 00:30:10.859 --> 00:30:14.059 -step physical palpation process that gives the 00:30:14.059 --> 00:30:17.200 nurse instant data about the fetal lie, presentation, 00:30:17.579 --> 00:30:20.359 engagement, and attitude. And most importantly, 00:30:20.460 --> 00:30:22.339 it tells you exactly where the baby's back is 00:30:22.339 --> 00:30:24.799 located. Why is the baby's back so important 00:30:24.799 --> 00:30:28.019 for the monitor? Because the fetal heart is located 00:30:28.019 --> 00:30:31.079 in the chest, but the chest is folded inward, 00:30:31.279 --> 00:30:33.619 muffled by the baby's arms and legs. Oh, because 00:30:33.619 --> 00:30:36.799 they're flexed. Right. The clearest, most unobstructed 00:30:36.799 --> 00:30:39.279 acoustic pathway to hear the fetal heart valve 00:30:39.279 --> 00:30:42.299 snapping shut is directly through the smooth, 00:30:42.579 --> 00:30:44.900 firm surface of the fetal back between their 00:30:44.900 --> 00:30:46.299 shoulder blades. So if you put it in the wrong 00:30:46.299 --> 00:30:49.440 spot? If you just guess and slap the ultrasound 00:30:49.440 --> 00:30:51.720 transducer onto the mother's belly, you might 00:30:51.720 --> 00:30:54.519 pick up the mother's own aortic pulse. Or you 00:30:54.519 --> 00:30:57.180 might get a broken, terrifyingly spotty signal 00:30:57.180 --> 00:30:59.279 that makes you think the baby is dying when they 00:30:59.279 --> 00:31:02.539 are actually fine. You must find the back. Walk 00:31:02.539 --> 00:31:04.259 us through the physical mechanics of the four 00:31:04.259 --> 00:31:06.700 steps. What are my hands actually doing? First, 00:31:06.859 --> 00:31:08.920 you stand beside the bed facing the patient. 00:31:09.339 --> 00:31:11.680 You place both hands firmly on the fundus, the 00:31:11.680 --> 00:31:14.720 very top of the uterus. You are feeling to determine 00:31:14.720 --> 00:31:17.140 what anatomical part is up there. Okay. Looking 00:31:17.140 --> 00:31:19.599 for the head or the butt? Right. A fetal head 00:31:19.599 --> 00:31:22.119 will feel hard, perfectly round, and it will 00:31:22.119 --> 00:31:24.779 move independently of the body. If you tap it, 00:31:24.839 --> 00:31:28.019 it bobs. If the baby is head down, you will feel 00:31:28.019 --> 00:31:30.319 the buttocks at the fundus. The buttocks feel 00:31:30.319 --> 00:31:33.039 softer, irregular, less symmetrical, and they 00:31:33.039 --> 00:31:35.759 move with the rest of the trunk. Step 2. You 00:31:35.759 --> 00:31:37.859 move your hands down to the sides of the maternal 00:31:37.859 --> 00:31:40.880 abdomen. You apply firm, steady pressure. You 00:31:40.880 --> 00:31:43.779 are trying to distinguish the sides. On one side, 00:31:43.799 --> 00:31:47.039 you will feel a smooth, continuous, convex curve. 00:31:47.759 --> 00:31:49.480 That is the fetal back. And that is where your 00:31:49.480 --> 00:31:52.000 monitor goes. Exactly. On the opposite side, 00:31:52.039 --> 00:31:55.079 you will feel knobby, irregular, lumpy protrusions. 00:31:55.200 --> 00:31:56.900 Those are the small parts, the elbows, knees, 00:31:56.960 --> 00:31:59.299 and feet. Step three. You take your dominant 00:31:59.299 --> 00:32:01.819 hand and grip the lower abdomen just above the 00:32:01.819 --> 00:32:04.140 maternal pubic symphysis using your thumb and 00:32:04.140 --> 00:32:06.559 fingers. You are palpating the presenting part, 00:32:06.579 --> 00:32:08.880 usually the head. You try to wiggle it gently. 00:32:09.299 --> 00:32:11.099 What does the wiggling tell you? If the head 00:32:11.099 --> 00:32:14.160 moves freely, it is unengaged. It is floating 00:32:14.160 --> 00:32:17.200 above the ischal spines. If it is locked firmly 00:32:17.200 --> 00:32:20.220 in place and cannot be moved, it is engaged at 00:32:20.220 --> 00:32:23.180 zero station. And the final step? You physically 00:32:23.180 --> 00:32:26.319 turn your body to face the patient's feet. You 00:32:26.319 --> 00:32:28.740 place your hands on both sides of the lower uterus 00:32:28.740 --> 00:32:31.539 and slide your fingers downward toward the pelvic 00:32:31.539 --> 00:32:35.049 inlet. You are feeling for the cephalic prominence, 00:32:35.089 --> 00:32:37.589 basically, the baby's brow line. Which tells 00:32:37.589 --> 00:32:40.490 you the attitude. Exactly. If you feel the prominence 00:32:40.490 --> 00:32:42.910 on the same side as the baby's small parts, the 00:32:42.910 --> 00:32:45.170 head is beautifully flexed. If you feel it on 00:32:45.170 --> 00:32:47.289 the same side as the back, the head is extended 00:32:47.289 --> 00:32:49.569 and you have a problem. But before the nurse 00:32:49.569 --> 00:32:51.990 even touches the patient's abdomen to do this, 00:32:52.450 --> 00:32:55.309 there are two crucial priority safety actions. 00:32:55.549 --> 00:32:58.750 Yes. First, you must have the patient completely 00:32:58.750 --> 00:33:01.160 empty her bladder. Just for her comfort. Partially 00:33:01.160 --> 00:33:03.339 for comfort, because deep palpation on a full 00:33:03.339 --> 00:33:06.619 bladder is agonizing. But clinically, a full 00:33:06.619 --> 00:33:09.039 distended bladder acts like a water balloon sitting 00:33:09.039 --> 00:33:11.400 right in front of the lower uterus. It physically 00:33:11.400 --> 00:33:14.019 displaces the uterus upward and to the side. 00:33:14.319 --> 00:33:16.559 It will give you a completely false reading of 00:33:16.559 --> 00:33:19.099 the fetal station and position. The bladder must 00:33:19.099 --> 00:33:22.180 be empty. Second, and this is a matter of life 00:33:22.180 --> 00:33:25.579 and death, never leave a pregnant patient flat 00:33:25.579 --> 00:33:28.700 on her back. Supine hypotension syndrome. This 00:33:28.700 --> 00:33:31.640 is foundational to obstetric safety. Walk us 00:33:31.640 --> 00:33:33.819 through the exact anatomical cascade of what 00:33:33.819 --> 00:33:35.859 happens when a laboring woman lies flat on her 00:33:35.859 --> 00:33:39.299 back. In late pregnancy, the gravid uterus, the 00:33:39.299 --> 00:33:42.119 fetus, the placenta, and the amniotic fluid weigh 00:33:42.119 --> 00:33:45.539 a significant amount. When the patient lies supine, 00:33:45.660 --> 00:33:48.279 gravity pulls that entire massive weight directly 00:33:48.279 --> 00:33:51.099 downward, compressing the inferior vena cava 00:33:51.099 --> 00:33:53.380 and the descending aorta against the maternal 00:33:53.380 --> 00:33:55.880 spine. The inferior vena cava is the massive 00:33:55.880 --> 00:33:58.359 vein returning all the deoxygenated blood from 00:33:58.359 --> 00:34:00.660 the lower body back to the right atrium of the 00:34:00.660 --> 00:34:03.059 heart, right? Exactly. When you crush that pipe, 00:34:03.380 --> 00:34:06.079 venous return drops to almost nothing. If blood 00:34:06.079 --> 00:34:07.640 isn't returning to the right side of the heart, 00:34:07.720 --> 00:34:10.099 the heart has nothing to pump out. Maternal cardiac 00:34:10.099 --> 00:34:12.300 output plummets. So her blood pressure tanks? 00:34:12.639 --> 00:34:16.059 Instantly. She will feel dizzy, nauseous, sweaty, 00:34:16.300 --> 00:34:19.360 and lightheaded. But the most dangerous consequence 00:34:19.360 --> 00:34:22.900 is invisible. What happens to the baby? If maternal 00:34:22.900 --> 00:34:25.139 blood pressure drops, the hydrostatic pressure 00:34:25.139 --> 00:34:27.880 required to force oxygenated blood through the 00:34:27.880 --> 00:34:30.760 uterine arteries into the placenta is lost. The 00:34:30.760 --> 00:34:33.780 placenta is starved of blood, and the fetus immediately 00:34:33.780 --> 00:34:36.619 begins suffocating. So what is the immediate 00:34:36.619 --> 00:34:39.780 life -saving nursing intervention? It is incredibly 00:34:39.780 --> 00:34:42.159 simple. You must physically displace the weight 00:34:42.159 --> 00:34:45.059 of the uterus off those vessels. You place a 00:34:45.059 --> 00:34:46.960 wedge, a rolled up blanket, or a pillow under 00:34:46.960 --> 00:34:49.280 the patient's right hip to tilt her slightly 00:34:49.280 --> 00:34:52.000 to the left. So she's not totally on her side, 00:34:52.119 --> 00:34:55.480 just wedged. Right. A 15 to 30 degree tilt is 00:34:55.480 --> 00:34:57.760 enough to roll the heavy uterus off the vena 00:34:57.760 --> 00:35:00.719 cava, restoring venous return and saving the 00:35:00.719 --> 00:35:03.880 fuel oxygen supply. Okay, so she is wedged. Her 00:35:03.880 --> 00:35:06.119 bladder is empty. We've done our Leopold's. We 00:35:06.119 --> 00:35:08.400 found the smooth curve of the fetal back. We 00:35:08.400 --> 00:35:10.420 place the ultrasound transducer there to capture 00:35:10.420 --> 00:35:13.519 the heart rate. Then we place the TOCO monitor, 00:35:13.820 --> 00:35:16.500 the two -catenometer on the fundus at the top 00:35:16.500 --> 00:35:18.699 of the uterus to measure the primary powers, 00:35:18.800 --> 00:35:22.219 the contractions. Right. The T -TOCO is an external 00:35:22.219 --> 00:35:25.239 pressure sensor. We strap it to the abdomen over 00:35:25.239 --> 00:35:27.860 the fundus because the fundus is the thickest 00:35:27.860 --> 00:35:30.079 part of the uterine muscle and the pacemaker 00:35:30.079 --> 00:35:33.559 where contractions begin. The TOCO measures two 00:35:33.559 --> 00:35:36.719 main parameters, frequency and duration. Let's 00:35:36.719 --> 00:35:39.119 clarify the definitions, because this is an easy 00:35:39.119 --> 00:35:42.119 place to lose points on an exam. Frequency is 00:35:42.119 --> 00:35:43.940 measured from the start of one contraction to 00:35:43.940 --> 00:35:46.219 the start of the very next contraction. Exactly, 00:35:46.599 --> 00:35:49.539 start to start. It is not the end of one to the 00:35:49.539 --> 00:35:51.909 start of the next. It tells us how often they 00:35:51.909 --> 00:35:54.510 are happening, usually measured in minutes. Duration 00:35:54.510 --> 00:35:56.750 is measured from the start of a single contraction 00:35:56.750 --> 00:35:59.690 to the end of that same contraction. It tells 00:35:59.690 --> 00:36:01.969 us how long the muscle is actually squeezing, 00:36:02.349 --> 00:36:05.050 measured in seconds. Perfect definitions. Now 00:36:05.050 --> 00:36:07.289 clinically, monitoring these contraction patterns 00:36:07.289 --> 00:36:09.829 is not just about seeing how fast labor is going. 00:36:10.010 --> 00:36:12.670 It is entirely about monitoring placental perfusion. 00:36:12.750 --> 00:36:15.570 Let's explain that mechanism. Why is the contraction 00:36:15.570 --> 00:36:18.610 pattern a matter of fetal survival? Why can't 00:36:18.610 --> 00:36:20.769 the uterus just stay contracted for 10 minutes 00:36:20.769 --> 00:36:22.889 and squeeze the baby out like toothpaste from 00:36:22.889 --> 00:36:25.809 a tube? Because of the unique vascular anatomy 00:36:25.809 --> 00:36:28.849 of the placenta. The maternal -fetal interface 00:36:28.849 --> 00:36:31.750 in the placenta is essentially a giant pool of 00:36:31.750 --> 00:36:34.840 maternal blood in the intervillus space. The 00:36:34.840 --> 00:36:37.880 mother's spiral arteries pump fresh oxygenated 00:36:37.880 --> 00:36:40.820 blood into this pool, and the fetal capillaries 00:36:40.820 --> 00:36:43.260 bathe in it, picking up the oxygen. Okay, makes 00:36:43.260 --> 00:36:45.940 sense. But those maternal spiral arteries travel 00:36:45.940 --> 00:36:48.679 directly through the thick wall of the uterine 00:36:48.679 --> 00:36:51.000 muscle. So when the muscle contracts... When 00:36:51.000 --> 00:36:53.320 the myometrium tightens during a contraction, 00:36:53.599 --> 00:36:56.440 it violently squeezes those spiral arteries shut. 00:36:56.599 --> 00:36:59.280 It completely occludes them. Blood flow from 00:36:59.280 --> 00:37:02.179 the mother to the placenta is temporarily halted. 00:37:02.519 --> 00:37:05.179 The pool stops... refilling. So the baby gets 00:37:05.179 --> 00:37:07.619 no fresh oxygen during a contraction. Exactly. 00:37:07.840 --> 00:37:10.920 This causes a period of transient fetal hypoxia. 00:37:11.119 --> 00:37:13.340 The baby essentially has to hold its breath and 00:37:13.340 --> 00:37:15.380 survive on whatever oxygen is already in the 00:37:15.380 --> 00:37:17.440 placental pool for the entire duration of the 00:37:17.440 --> 00:37:19.820 contraction. Wow. So the relaxation period, that 00:37:19.820 --> 00:37:22.219 soft resting tone between the contractions, is 00:37:22.219 --> 00:37:24.519 not just a break for the mother's pain. It is 00:37:24.519 --> 00:37:26.159 the only time the baby gets to take a breath 00:37:26.159 --> 00:37:29.199 and recover their oxygen levels. Exactly. The 00:37:29.199 --> 00:37:32.599 resting tone is the lifeline. A healthy fetus 00:37:32.599 --> 00:37:35.579 has physiological reserves and can tolerate this 00:37:35.579 --> 00:37:38.260 temporary drop in oxygen perfectly fine, provided 00:37:38.260 --> 00:37:40.780 they get enough time to recover. We expect to 00:37:40.780 --> 00:37:42.820 see three to five contractions in a 10 -minute 00:37:42.820 --> 00:37:46.880 window, with each lasting maybe 60 to 90 seconds. 00:37:46.960 --> 00:37:48.860 But if they come too fast? If the contractions 00:37:48.860 --> 00:37:51.380 are coming too fast or lasting too long, the 00:37:51.380 --> 00:37:54.559 baby gets zero recovery time. The pool never 00:37:54.559 --> 00:37:57.420 refills. Which brings us to a massively important 00:37:57.420 --> 00:38:01.320 concerning finding. Tachycystally. The text defines 00:38:01.320 --> 00:38:03.860 tachycystally as more than five contractions 00:38:03.860 --> 00:38:06.599 in a 10 -minute period, averaged over a 30 -minute 00:38:06.599 --> 00:38:09.539 window. More than 5 in 10 is a clinical emergency. 00:38:10.000 --> 00:38:12.400 It means the uterus is hyperstimulated, the muscle 00:38:12.400 --> 00:38:14.940 is spasming, the spiral arteries are constantly 00:38:14.940 --> 00:38:17.079 restricted, and the resting tone is obliterated. 00:38:17.239 --> 00:38:19.679 So the baby is basically drowning. Sustained 00:38:19.679 --> 00:38:22.159 tachycystal will rapidly deplete the fetal oxygen 00:38:22.159 --> 00:38:24.980 reserves, leading to severe fetal hypoxia, metabolic 00:38:24.980 --> 00:38:27.559 acidosis, and brain injury. You are mechanically 00:38:27.559 --> 00:38:30.170 starving the fetus of oxygen. I want to talk 00:38:30.170 --> 00:38:32.550 about measuring the strength or the intensity 00:38:32.550 --> 00:38:35.849 of these contractions. The text is very specific 00:38:35.849 --> 00:38:39.110 about an exam trap here. A lot of students and 00:38:39.110 --> 00:38:41.909 even some new nurses think that the external 00:38:41.909 --> 00:38:45.210 TOCO monitor tells you how strong a contraction 00:38:45.210 --> 00:38:47.849 is by how high the little mountain goes on the 00:38:47.849 --> 00:38:50.329 graph paper. That is a fundamental misunderstanding 00:38:50.329 --> 00:38:52.650 of the equipment and exams test it constantly. 00:38:52.889 --> 00:38:56.690 An external TOCO cannot, under any circumstances, 00:38:57.409 --> 00:38:59.909 measure the true strength or intensity of a contraction. 00:39:00.510 --> 00:39:02.849 It only measures frequency and duration. So the 00:39:02.849 --> 00:39:04.769 height of a line doesn't matter? The height of 00:39:04.769 --> 00:39:07.690 the line on a TOCO strip is completely subjective. 00:39:07.949 --> 00:39:10.030 It is affected by the thickness of the maternal 00:39:10.030 --> 00:39:12.570 abdominal fat pad, how tightly you strap the 00:39:12.570 --> 00:39:14.969 belt on, whether the patient coughs or if she 00:39:14.969 --> 00:39:17.929 vomits. It is literally just a plastic button 00:39:17.929 --> 00:39:20.489 sensing pressure against the outside of the abdominal 00:39:20.489 --> 00:39:22.730 wall. I have a perfect analogy for this. Let's 00:39:22.730 --> 00:39:25.150 hear it. Relying on an external TOCO is like 00:39:25.150 --> 00:39:28.190 pressing your hand flat against a closed solid 00:39:28.190 --> 00:39:31.630 oak door to feel if someone on the other side 00:39:31.630 --> 00:39:34.730 is knocking. You can feel the vibration so you 00:39:34.730 --> 00:39:36.610 know exactly when they are knocking. You know 00:39:36.610 --> 00:39:38.849 exactly how long they knock. But because of the 00:39:38.849 --> 00:39:41.329 thick door, you really can't tell exactly how 00:39:41.329 --> 00:39:44.389 hard they are hitting the wood. If you want to 00:39:44.389 --> 00:39:46.849 know the true acoustic intensity, you need to 00:39:46.849 --> 00:39:49.349 put a microphone actually inside the room. That's 00:39:49.349 --> 00:39:52.670 a phenomenal analogy. And in obstetrics, that 00:39:52.670 --> 00:39:55.210 internal microphone is the intraderine pressure 00:39:55.210 --> 00:39:58.250 catheter, or the IUPC. How does that work? The 00:39:58.250 --> 00:40:02.170 IUPC is a sterile, flexible, fluid -filled catheter. 00:40:02.530 --> 00:40:04.940 The provider inserts it vaginally. threads it 00:40:04.940 --> 00:40:06.840 up through the dilated cervix, and places it 00:40:06.840 --> 00:40:09.360 directly into the uterine cavity, resting right 00:40:09.360 --> 00:40:12.260 next to the baby. So it's inside the room. Exactly. 00:40:12.420 --> 00:40:14.079 Because it is inside the sealed environment, 00:40:14.139 --> 00:40:16.260 it can accurately measure the exact internal 00:40:16.260 --> 00:40:18.679 hydrostatic pressure generated by the contracting 00:40:18.679 --> 00:40:21.739 muscle. It measures intensity in highly specific 00:40:21.739 --> 00:40:24.099 units called Montevideo units, or millimeters 00:40:24.099 --> 00:40:26.239 of mercury. But there is a catch. You can't just 00:40:26.239 --> 00:40:29.320 put an IUPC in any one. Correct. Remember our 00:40:29.320 --> 00:40:32.860 rule about barriers. To place an IUPC, two things 00:40:32.860 --> 00:40:35.929 must be true. The cervix must be dilated enough 00:40:35.929 --> 00:40:38.530 to physically pass the catheter and the amniotic 00:40:38.530 --> 00:40:40.889 membranes must be ruptured. You cannot slide 00:40:40.889 --> 00:40:43.309 a catheter inside a sealed balloon. Right. Okay, 00:40:43.309 --> 00:40:45.429 let's hit our five takeaways for monitoring the 00:40:45.429 --> 00:40:48.130 engine. Number one, empty the bladder before 00:40:48.130 --> 00:40:51.530 Leopold maneuvers. Number two, never leave a 00:40:51.530 --> 00:40:53.690 pregnant patient flat on their back to avoid 00:40:53.690 --> 00:40:56.550 supine hypotension. Number three, contraction 00:40:56.550 --> 00:40:58.750 frequency is measured from the start of one to 00:40:58.750 --> 00:41:01.559 the start of the next. Number four, Texas Lee, 00:41:01.780 --> 00:41:04.280 which is more than five and ten minutes, starves 00:41:04.280 --> 00:41:07.579 the fetus of oxygen. And number five, only an 00:41:07.579 --> 00:41:10.119 IUPC can accurately measure the intensity of 00:41:10.119 --> 00:41:12.699 a contraction. Okay, that is the core of maternal 00:41:12.699 --> 00:41:15.099 assessment. So our monitors are correctly placed, 00:41:15.500 --> 00:41:18.179 the TCO is tracking the timing of the contractions. 00:41:18.539 --> 00:41:20.420 The ultrasound is locked onto the fetal back, 00:41:20.719 --> 00:41:22.980 tracking the heart rate. Now we pull up a chair 00:41:22.980 --> 00:41:24.840 and we look at the screen. What is the baby's 00:41:24.840 --> 00:41:27.179 heart telling us about their brain? We have arrived 00:41:27.179 --> 00:41:29.960 at the holy grail of obstetric nursing exams. 00:41:30.320 --> 00:41:33.059 Yes, fetal heart rate monitoring in categories. 00:41:33.659 --> 00:41:36.880 This is, without a doubt, the most highly tested, 00:41:37.099 --> 00:41:39.940 highly stressful area in all of OB nursing. And 00:41:39.940 --> 00:41:42.530 rightfully so. Fetal heart rate monitoring is 00:41:42.530 --> 00:41:44.949 the only tool the nurse has to determine if the 00:41:44.949 --> 00:41:47.630 fetus is thriving in a healthy environment or 00:41:47.630 --> 00:41:50.190 if they are actively dying of asphyxiation. No 00:41:50.190 --> 00:41:52.730 pressure. Right. You must be able to glance at 00:41:52.730 --> 00:41:55.230 a strip, analyze the components, synthesize them 00:41:55.230 --> 00:41:58.030 into a category, and know instantly whether to 00:41:58.030 --> 00:42:00.269 document and observe or whether you need to pull 00:42:00.269 --> 00:42:02.690 the emergency alarm. Let's bring down the individual 00:42:02.690 --> 00:42:04.909 components of the strip systematically. We have 00:42:04.909 --> 00:42:07.469 the baseline, the variability, accelerations, 00:42:07.630 --> 00:42:11.219 and decelerations. First, the baseline FHR. The 00:42:11.219 --> 00:42:13.400 baseline is the average heart rate when the baby 00:42:13.400 --> 00:42:16.420 is not stressed by a contraction. The expected 00:42:16.420 --> 00:42:19.360 normal baseline fetal heart rate is between 110 00:42:19.360 --> 00:42:22.619 and 160 beats per minute. The nurse assesses 00:42:22.619 --> 00:42:24.380 this by looking at a 10 -minute window of the 00:42:24.380 --> 00:42:27.000 strip and finding the mean rate, excluding any 00:42:27.000 --> 00:42:29.320 temporary spikes or drops. What if the baseline 00:42:29.320 --> 00:42:31.619 drifts outside that window? Like what if it's 00:42:31.619 --> 00:42:34.059 too high or too low? If the baseline heart rate 00:42:34.059 --> 00:42:37.320 is consistently below 110 for more than 10 consecutive 00:42:37.320 --> 00:42:39.940 minutes, that is officially defined as fetal 00:42:39.940 --> 00:42:43.320 bradycardia. If it is consistently above 160 00:42:43.320 --> 00:42:46.539 for more than 10 minutes, that is fetal tachycardia. 00:42:46.579 --> 00:42:49.059 And what do those extremes physically mean? The 00:42:49.059 --> 00:42:52.380 text mentions tachycardia can actually be an 00:42:52.380 --> 00:42:55.119 early warning sign of a maternal issue. Absolutely. 00:42:55.539 --> 00:42:57.599 Fetal tachycardia is often the very first sign 00:42:57.599 --> 00:43:00.559 of a maternal infection, like chorioamnionitis. 00:43:01.000 --> 00:43:03.139 As the mother's temperature rises, the fetal 00:43:03.139 --> 00:43:05.300 metabolic rate skyrockets and there are heart 00:43:05.300 --> 00:43:07.860 races to keep up. Makes sense, like a fever in 00:43:07.860 --> 00:43:11.139 an adult. Exactly. It can also be an early compensatory 00:43:11.139 --> 00:43:13.820 mechanism for fetal hypoxia. The heart beats 00:43:13.820 --> 00:43:16.460 faster to try and circulate whatever meager oxygen 00:43:16.460 --> 00:43:19.280 is left. Brainycardia, on the other hand, is 00:43:19.280 --> 00:43:21.659 a late and dire sign. It's failing. Right. It 00:43:21.659 --> 00:43:23.500 means the compensatory mechanisms have failed, 00:43:24.039 --> 00:43:25.880 the heart muscle itself is scarved of oxygen, 00:43:26.119 --> 00:43:28.659 and it is failing. It is often associated with 00:43:28.659 --> 00:43:30.980 a massive cord prolapse, a placental abruption, 00:43:31.159 --> 00:43:33.659 or terminal hypoxia. But the baseline is just 00:43:33.659 --> 00:43:36.579 the broad average. The real diagnostic magic, 00:43:36.659 --> 00:43:38.719 the most critical indicator of fetal well -being 00:43:38.719 --> 00:43:41.739 on that entire monitor, is variability. Yes. 00:43:42.139 --> 00:43:44.579 Variability is the nuance. It refers to the squiggly 00:43:44.579 --> 00:43:48.039 lines on the monitor. If you look closely at 00:43:48.039 --> 00:43:50.800 a healthy fetal heart rate tracing, it is never 00:43:50.800 --> 00:43:53.559 a perfectly flat straight line. It looks like 00:43:53.559 --> 00:43:56.119 a jagged sawtooth. It constantly jitters up and 00:43:56.119 --> 00:43:58.679 down, beat to beat. What biological mechanism 00:43:58.679 --> 00:44:01.940 causes that jitter? That jitter is the physical 00:44:01.940 --> 00:44:04.519 manifestation of the fetal central nervous system 00:44:04.519 --> 00:44:08.460 at work. Specifically, it is the constant microscopic 00:44:08.460 --> 00:44:11.420 tug of war between the sympathetic nervous system, 00:44:11.500 --> 00:44:13.380 which is trying to speed the heart up, and the 00:44:13.380 --> 00:44:15.179 parasympathetic nervous system, which is trying 00:44:15.179 --> 00:44:17.380 to slow it down. So they're just constantly fighting 00:44:17.380 --> 00:44:19.519 for control? Yes, they are constantly fighting 00:44:19.519 --> 00:44:22.440 for control based on momentary changes in blood 00:44:22.440 --> 00:44:25.079 pressure and oxygen. And the text says that moderate 00:44:25.079 --> 00:44:28.179 variability is the absolute goal. Moderate variability 00:44:28.179 --> 00:44:30.460 means the heart rate fluctuates between 6 and 00:44:30.460 --> 00:44:33.119 25 beats per minute around the baseline. It is 00:44:33.119 --> 00:44:35.480 the holy grail of fetal monitoring. Because it 00:44:35.480 --> 00:44:38.070 proves the brain is working. Exactly. If you 00:44:38.070 --> 00:44:41.369 see moderate variability, it guarantees two vital 00:44:41.369 --> 00:44:44.349 physiological effects. The fetal central nervous 00:44:44.349 --> 00:44:46.710 system is fully intact and functioning, and the 00:44:46.710 --> 00:44:49.809 fetal brain is adequately oxygenated. The baby 00:44:49.809 --> 00:44:52.590 is not profoundly hypoxic, and they are not acidotic. 00:44:52.670 --> 00:44:54.789 It is the single most reassuring sign you can 00:44:54.789 --> 00:44:57.150 have. What if those squiggles start to flatten 00:44:57.150 --> 00:45:00.130 out? Minimal variability is defined as less than 00:45:00.130 --> 00:45:02.869 five beats of fluctuation, and absent variability 00:45:02.869 --> 00:45:06.159 is a completely flat, ruler -straight line. No 00:45:06.159 --> 00:45:08.460 squiggles at all. I have a clinical question 00:45:08.460 --> 00:45:10.900 about this. If the variability goes completely 00:45:10.900 --> 00:45:13.440 flat, is the baby always in mortal danger, or 00:45:13.440 --> 00:45:16.119 can they just be, well, taking a nap? That is 00:45:16.119 --> 00:45:17.980 a phenomenal question, and it requires sharp 00:45:17.980 --> 00:45:20.079 clinical judgment. It is true that a fetus has 00:45:20.079 --> 00:45:22.280 sleep cycles, and when they sleep, their central 00:45:22.280 --> 00:45:24.280 nervous system activity naturally depresses, 00:45:24.420 --> 00:45:26.760 which can cause minimal variability for about 00:45:26.760 --> 00:45:29.559 20 to 40 minutes. Okay, so sleep causes minimal. 00:45:29.710 --> 00:45:32.929 Right. Furthermore, if the nurse just administered 00:45:32.929 --> 00:45:35.929 an opioid analgesic to the mother, or if she 00:45:35.929 --> 00:45:38.829 is on a magnesium sulfate drip for preeclampsia, 00:45:39.090 --> 00:45:41.269 those central nervous system depressants easily 00:45:41.269 --> 00:45:43.550 cross the placenta. They put the baby's nervous 00:45:43.550 --> 00:45:46.030 system to sleep, causing minimal variability. 00:45:46.590 --> 00:45:48.849 So minimal variability can be pharmacological 00:45:48.849 --> 00:45:51.829 or physiological. But what about absent variability, 00:45:52.309 --> 00:45:55.429 the flat line? Absent variability is never, ever 00:45:55.429 --> 00:45:58.050 considered a normal sleep cycle. A perfectly 00:45:58.050 --> 00:46:00.170 flat line means the tug -of -war has stopped 00:46:00.170 --> 00:46:03.170 entirely. The autonomic nervous system has shut 00:46:03.170 --> 00:46:06.250 down. That's terrifying. It is. If absent variability 00:46:06.250 --> 00:46:08.690 is combined with decelerations in the heart rate, 00:46:09.110 --> 00:46:11.309 it means the fetal brain is suffering from severe 00:46:11.309 --> 00:46:15.130 hypoxia and metabolic acidemia. The acid is literally 00:46:15.130 --> 00:46:17.230 depressing the brain tissue. It is a critical 00:46:17.230 --> 00:46:20.119 emergency. Okay, so we want moderate squiggles 00:46:20.119 --> 00:46:22.119 to prove the brain is oxygenated. Now let's talk 00:46:22.119 --> 00:46:24.820 about the big jumps above the baseline. Accelerations. 00:46:25.260 --> 00:46:27.860 Accelerations are abrupt, temporary increases 00:46:27.860 --> 00:46:30.980 in the fetal heart rate. For a term baby over 00:46:30.980 --> 00:46:34.199 32 weeks gestation, we are looking for a jump 00:46:34.199 --> 00:46:37.380 of at least 15 beats per minute above the baseline, 00:46:37.719 --> 00:46:40.760 and that jump must last for at least 15 seconds 00:46:40.760 --> 00:46:43.920 before returning to normal. This is known universally 00:46:43.920 --> 00:46:46.960 as the 15 by 15 rule. And accelerations are always 00:46:46.960 --> 00:46:49.039 a good thing, right? There's no such thing as 00:46:49.039 --> 00:46:52.139 a dangerous acceleration. Always good. Accelerations 00:46:52.139 --> 00:46:55.599 mean the baby has robust oxygen reserves. When 00:46:55.599 --> 00:46:58.639 the baby kicks, rolls, or gets stimulated, their 00:46:58.639 --> 00:47:00.780 heart rate jumps up to supply the muscles with 00:47:00.780 --> 00:47:02.699 oxygen. Just like your heart rate jumps when 00:47:02.699 --> 00:47:04.920 you spread up a flight of stairs, it proves the 00:47:04.920 --> 00:47:07.280 cardiovascular system is highly responsive and 00:47:07.280 --> 00:47:09.519 healthy. Now we enter the complicated territory, 00:47:09.699 --> 00:47:13.000 the drops. Decelerations. The text breaks these 00:47:13.000 --> 00:47:15.500 down into four highly specific types based on 00:47:15.500 --> 00:47:17.619 their shape and their timing relative to the 00:47:17.619 --> 00:47:20.559 maternal contractions. Early, late, variable, 00:47:20.699 --> 00:47:22.940 and prolonged. This is where exams absolutely 00:47:22.940 --> 00:47:25.800 love to trap students. Let's start with early 00:47:25.800 --> 00:47:28.900 decelerations. Early decelerations have a very 00:47:28.900 --> 00:47:32.340 specific visual profile. They are gradual, smooth 00:47:32.340 --> 00:47:34.239 drops in the heart rate that perfectly mirror 00:47:34.239 --> 00:47:36.320 the maternal contraction. They are symmetrical. 00:47:36.440 --> 00:47:39.150 So they match up exactly. Yes. As the uterine 00:47:39.150 --> 00:47:41.550 contraction begins to build, the fetal heart 00:47:41.550 --> 00:47:44.460 rate smoothly begins to drop. At the exact moment 00:47:44.460 --> 00:47:47.159 the contraction hits its absolute peak intensity, 00:47:47.679 --> 00:47:49.820 the heart rate hits its lowest point, the nadir. 00:47:50.440 --> 00:47:53.059 And as the contraction fades away, the heart 00:47:53.059 --> 00:47:55.460 rate smoothly returns to baseline. They start 00:47:55.460 --> 00:47:57.679 together, they peak together, and they end together. 00:47:58.079 --> 00:48:00.719 They look like a reflection in a pond. What is 00:48:00.719 --> 00:48:03.420 the physiological cause of that perfect mirroring? 00:48:03.699 --> 00:48:05.920 Is the baby being suffocated by the contraction? 00:48:06.199 --> 00:48:08.800 No, it is not an oxygen issue at all. It is a 00:48:08.800 --> 00:48:12.010 mechanical pressure issue. Think about what happens 00:48:12.010 --> 00:48:14.829 as the fetus descends low into the maternal pelvis. 00:48:15.309 --> 00:48:17.869 The bony head is squeezed tightly by the contracting 00:48:17.869 --> 00:48:20.969 uterus and the rigid pelvic bones. Ouch. Right. 00:48:21.230 --> 00:48:23.389 This intense physical compression of the skull 00:48:23.389 --> 00:48:26.210 increases the fetal intracranial pressure. And 00:48:26.210 --> 00:48:27.630 increased pressure in the brain does what to 00:48:27.630 --> 00:48:30.949 the heart? It triggers a protective reflex. The 00:48:30.949 --> 00:48:33.289 high pressure stimulates the fetal vagus nerve. 00:48:33.949 --> 00:48:36.630 The vagus nerve fires a signal directly to the 00:48:36.630 --> 00:48:38.840 heart to slow down. It's essentially the fetal 00:48:38.840 --> 00:48:41.440 version of the Cushing reflex. The moment the 00:48:41.440 --> 00:48:43.119 contraction ends and the pressure on the skull 00:48:43.119 --> 00:48:45.900 is released, the vagus nerve stops firing and 00:48:45.900 --> 00:48:48.139 the heart rate returns to normal. Because it 00:48:48.139 --> 00:48:51.880 is an expected mechanical vagal response to the 00:48:51.880 --> 00:48:54.440 head being squeezed in the birth canal, it isn't 00:48:54.440 --> 00:48:58.230 dangerous. Exactly. Early decelerations are completely 00:48:58.230 --> 00:49:00.909 benign. They do not indicate hypoxia. They do 00:49:00.909 --> 00:49:03.409 not cause brain damage. In fact, they usually 00:49:03.409 --> 00:49:05.530 just tell the nurse that the baby is descending 00:49:05.530 --> 00:49:07.809 nicely and labor is progressing. So what does 00:49:07.809 --> 00:49:10.050 the nurse do? Therefore, early decelerations 00:49:10.050 --> 00:49:12.590 do not require any medical or nursing intervention. 00:49:12.829 --> 00:49:15.190 You do not touch the patient. You just document 00:49:15.190 --> 00:49:18.130 the finding and continue to observe. So a classic 00:49:18.130 --> 00:49:20.869 exam trap would present a scenario with early 00:49:20.869 --> 00:49:23.510 decelerations and offer multiple choice answers 00:49:23.510 --> 00:49:26.710 like administer oxygen, turn the patient, or 00:49:26.710 --> 00:49:29.510 prepare for surgery. The educated nurse has to 00:49:29.510 --> 00:49:32.070 recognize the shape, know the physiological cause 00:49:32.070 --> 00:49:34.989 is head compression, realize it's benign, and 00:49:34.989 --> 00:49:37.750 confidently choose the answer, document findings. 00:49:38.030 --> 00:49:40.510 Exactly. Do not intervene for an early death. 00:49:40.869 --> 00:49:43.610 But late decelerations are a completely different, 00:49:43.809 --> 00:49:46.969 terrifying story. Late decelerations look very 00:49:46.969 --> 00:49:49.650 similar to early decelerations in their shape. 00:49:50.130 --> 00:49:53.269 They are smooth, gradual, and symmetrical. But 00:49:53.269 --> 00:49:55.670 their timing is shifted to the right on the graph 00:49:55.670 --> 00:49:57.610 paper. What do you mean shifted to the right? 00:49:58.190 --> 00:50:00.269 The fetal heart rate does not even begin to drop 00:50:00.269 --> 00:50:02.570 until after the maternal contraction has reached 00:50:02.570 --> 00:50:04.909 its peak. And the heart rate does not recover 00:50:04.909 --> 00:50:07.510 back to baseline until well after the contraction 00:50:07.510 --> 00:50:09.590 is completely over and the uterus is resting. 00:50:09.949 --> 00:50:12.670 Why the delay? Let's connect this back to our 00:50:12.670 --> 00:50:15.050 deep dive on contraction hemodynamics and the 00:50:15.050 --> 00:50:17.550 placenta. Remember how a contraction acts like 00:50:17.550 --> 00:50:20.050 a vice, clamping down on the maternal spiral 00:50:20.050 --> 00:50:22.190 arteries and temporarily stopping blood flow 00:50:22.190 --> 00:50:25.250 to the placental pool? Yes. The baby holds its 00:50:25.250 --> 00:50:28.389 breath. A healthy placenta is robust. It holds 00:50:28.389 --> 00:50:30.630 enough reserve oxygen in that pool to easily 00:50:30.630 --> 00:50:33.110 tide the baby over during that 60 -second squeeze. 00:50:33.849 --> 00:50:36.050 The baby's blood oxygen levels remain stable, 00:50:36.190 --> 00:50:38.309 so the heart rate remains stable. But what if 00:50:38.309 --> 00:50:41.340 the placenta is failing? What if the mother has 00:50:41.340 --> 00:50:44.139 severe preeclampsia or hypertension where she's 00:50:44.139 --> 00:50:46.800 a heavy smoker and those spiral arteries are 00:50:46.800 --> 00:50:49.380 already calcified and damaged? That is called 00:50:49.380 --> 00:50:52.480 uteroplacental insufficiency. The placenta is 00:50:52.480 --> 00:50:56.019 compromised. It has zero oxygen reserve. So when 00:50:56.019 --> 00:50:58.099 the contraction peaks and cuts off the fresh 00:50:58.099 --> 00:51:00.679 blood flow, the oxygen in the placental pool 00:51:00.679 --> 00:51:04.280 is instantly depleted. The fetal blood oxygen 00:51:04.280 --> 00:51:06.940 level drops precipitously. So why doesn't the 00:51:06.940 --> 00:51:08.920 heart rate drop the exact second the blood is 00:51:08.920 --> 00:51:11.460 cut off? Why the late delay? Because of circulation 00:51:11.460 --> 00:51:14.099 time, the oxygen drops in the placenta. It takes 00:51:14.099 --> 00:51:16.559 several seconds for that deoxygenated hypoxic 00:51:16.559 --> 00:51:19.039 blood to travel down the umbilical vein, enter 00:51:19.039 --> 00:51:20.940 the fetal body, pass through the fetal liver, 00:51:21.260 --> 00:51:23.280 enter the fetal heart, and finally get pumped 00:51:23.280 --> 00:51:25.500 up to the fetal brain. Oh, wow. That's a long 00:51:25.500 --> 00:51:27.960 journey. Right. Once that hypoxic blood reaches 00:51:27.960 --> 00:51:30.659 the brain, specialized chemoreceptors in the 00:51:30.659 --> 00:51:33.400 aortic, arch, and carotid bodies detect the sudden 00:51:33.400 --> 00:51:36.539 lack of oxygen. They panic. They trigger the 00:51:36.539 --> 00:51:39.420 vagus nerve to slow the heart down, hoping to 00:51:39.420 --> 00:51:41.400 drastically reduce the heart muscle's demand 00:51:41.400 --> 00:51:44.699 for oxygen and conserve energy. That is fascinating. 00:51:45.340 --> 00:51:47.579 The delay is literally the time it takes for 00:51:47.579 --> 00:51:50.059 the suffocating blood to travel from the placenta 00:51:50.059 --> 00:51:53.460 to the baby's brain chemoreceptor. Precisely. 00:51:53.559 --> 00:51:55.920 That is why it is a late deceleration. It is 00:51:55.920 --> 00:51:58.400 a delayed neurological reaction to suffocating. 00:51:58.840 --> 00:52:01.260 Late decelerations mean the placenta is failing 00:52:01.260 --> 00:52:04.300 to do its job. It is an ominous sign. requires 00:52:04.300 --> 00:52:06.380 immediate aggressive nursing intervention to 00:52:06.380 --> 00:52:09.420 restore maternal blood flow. Okay, so, early's 00:52:09.420 --> 00:52:12.480 are head compression, benign. Late's are utero 00:52:12.480 --> 00:52:15.300 -clinical insufficiency, highly dangerous. What 00:52:15.300 --> 00:52:18.039 about variable decelerations? Variable decelerations 00:52:18.039 --> 00:52:20.000 are an entirely different beast. They do not 00:52:20.000 --> 00:52:22.219 look smooth, they are not gradual, and they are 00:52:22.219 --> 00:52:24.519 not necessarily tied to the timing of the contraction 00:52:24.519 --> 00:52:26.940 at all. What do they look like? They are abrupt, 00:52:27.280 --> 00:52:29.719 sharp, jagged drops in the heart rate. They look 00:52:29.719 --> 00:52:33.460 like a sharp letter V, a U, or a W on the monitor. 00:52:34.139 --> 00:52:36.320 The heart rate plummets instantly, and it usually 00:52:36.320 --> 00:52:38.960 bounces back just as fast. And what's the physiological 00:52:38.960 --> 00:52:41.679 cause driving that sharp drop? Umbilical cord 00:52:41.679 --> 00:52:44.840 compression. The umbilical cord is the baby's 00:52:44.840 --> 00:52:47.760 only lifeline, containing one vein and two arteries. 00:52:48.360 --> 00:52:50.519 If that cord gets squeezed, maybe the baby grabs 00:52:50.519 --> 00:52:52.440 it with their hand or rolls over onto it, or 00:52:52.440 --> 00:52:54.860 perhaps the amniotic fluid is too low to adequately 00:52:54.860 --> 00:52:58.190 cushion it. The blood vessels inside collapse. 00:52:58.409 --> 00:53:00.630 Walk me through the hemodynamics of that collapse 00:53:00.630 --> 00:53:03.230 because it explains the shape. The umbilical 00:53:03.230 --> 00:53:05.710 vein, which carries oxygenated blood to the baby, 00:53:05.949 --> 00:53:09.309 has a thin, floppy wall. When the cord is squeezed, 00:53:09.489 --> 00:53:12.289 the vein collapses first. This cuts off blood 00:53:12.289 --> 00:53:14.829 returned to the fetal heart, causing fetal cardiac 00:53:14.829 --> 00:53:17.590 output to drop. The fetal baroreceptors detect 00:53:17.590 --> 00:53:20.150 this drop in pressure and trigger a slight compensatory 00:53:20.150 --> 00:53:22.809 spike in the heart rate. But a millisecond later, 00:53:22.969 --> 00:53:25.170 the thick -walled umbilical arteries collapse. 00:53:25.630 --> 00:53:27.650 Suddenly, the fetal heart is pumping against 00:53:27.650 --> 00:53:30.329 a brick wall. Fetal blood pressure skyrockets 00:53:30.329 --> 00:53:33.619 massively. The baroreceptors scream in panic 00:53:33.619 --> 00:53:36.179 and the vagus nerve fires a massive impulse, 00:53:36.599 --> 00:53:38.340 plummeting the heart rate abruptly to protect 00:53:38.340 --> 00:53:40.099 the heart from exploding under the pressure. 00:53:40.599 --> 00:53:42.559 When the pressure on the cord is released, the 00:53:42.559 --> 00:53:44.800 sequence reverses and the heart rate shoots right 00:53:44.800 --> 00:53:47.360 back up. That explains the jagged abrupt nature 00:53:47.360 --> 00:53:50.199 of the variable deceleration. It's a rapid -fire 00:53:50.199 --> 00:53:53.539 vascular pressure crisis. Okay, and finally, 00:53:54.420 --> 00:53:57.150 prolonged decelerations. A prolonged deceleration 00:53:57.150 --> 00:53:59.570 is simply a profound drop in the heart rate, 00:53:59.630 --> 00:54:01.750 at least 15 beats per minute below baseline. 00:54:02.010 --> 00:54:03.909 That lasts for longer than 2 minutes, but less 00:54:03.909 --> 00:54:06.630 than 10 minutes. If it lasts longer than 10 minutes, 00:54:06.630 --> 00:54:09.329 remember that's no longer a deceleration that 00:54:09.329 --> 00:54:12.150 is a permanent baseline change to bradycardia. 00:54:12.369 --> 00:54:14.949 What causes a prolonged decel? Prolonged decelerations 00:54:14.949 --> 00:54:17.190 happen when whatever is causing the stress, a 00:54:17.190 --> 00:54:20.230 cord prolapse, severe tachycystole, or massive 00:54:20.230 --> 00:54:22.789 maternal hycotension following an epidural placement 00:54:22.789 --> 00:54:25.679 is severe and is not resolving on its own. There 00:54:25.679 --> 00:54:27.780 is one more pattern the text mentions, and it 00:54:27.780 --> 00:54:30.480 sounds incredibly ominous. The sinusoidal pattern. 00:54:30.719 --> 00:54:34.079 It is extremely rare, but highly lethal. A sinusoidal 00:54:34.079 --> 00:54:36.159 pattern looks like a smooth, undulating sine 00:54:36.159 --> 00:54:39.000 wave. It is perfectly rhythmic, waving up and 00:54:39.000 --> 00:54:41.920 down like a snake, with absolutely no normal 00:54:41.920 --> 00:54:43.860 beat -to -beat variability. What does that mean? 00:54:44.179 --> 00:54:47.679 It usually indicates severe, profound fetal anemia. 00:54:48.059 --> 00:54:50.260 This can happen from a massive fetal maternal 00:54:50.260 --> 00:54:53.739 hemorrhage, a ruptured vasa previa, or severe 00:54:53.739 --> 00:54:57.219 RH isoimmune... where maternal antibodies are 00:54:57.219 --> 00:54:59.380 actively destroying the fetal red blood cells. 00:54:59.840 --> 00:55:02.800 The baby's bleeding out or their blood is completely 00:55:02.800 --> 00:55:05.699 incapable of carrying oxygen. It requires immediate 00:55:05.699 --> 00:55:07.960 emergent surgical delivery. Okay, this is a massive 00:55:07.960 --> 00:55:10.219 amount of physiological data to take in. How 00:55:10.219 --> 00:55:12.280 does the bedside nurse synthesize all these pieces, 00:55:12.539 --> 00:55:14.940 baseline variability, accelerations and decelerations, 00:55:15.320 --> 00:55:17.860 into actionable clinical steps? We synthesize 00:55:17.860 --> 00:55:20.039 the data using the three -tier categorization 00:55:20.039 --> 00:55:22.500 system dictated by national guidelines. Every 00:55:22.500 --> 00:55:24.460 single fetal heart rate strip must be must be 00:55:24.460 --> 00:55:26.980 classified as category 1, category 2, or category 00:55:26.980 --> 00:55:29.679 3. Let's define the parameters of category 1. 00:55:30.079 --> 00:55:32.699 This is the perfect healthy strip. The baseline 00:55:32.699 --> 00:55:36.420 is exactly where it should be, 110 to 160. The 00:55:36.420 --> 00:55:38.860 variability is moderate, proving the brain is 00:55:38.860 --> 00:55:41.699 oxygenated. Accelerations can be present or absent. 00:55:42.039 --> 00:55:44.530 The other is fine. Early decelerations from head 00:55:44.530 --> 00:55:47.550 compression can be present or absent. But crucially, 00:55:47.690 --> 00:55:51.369 to be a category 1, there must be NO late decelerations 00:55:51.369 --> 00:55:54.250 and NO variable decelerations. Right. Category 00:55:54.250 --> 00:55:56.650 1 is strongly predictive of normal fetal acid 00:55:56.650 --> 00:55:59.460 base status. The baby is perfectly fine. The 00:55:59.460 --> 00:56:02.019 nursing action is simple, routine continuous 00:56:02.019 --> 00:56:04.719 or intermittent monitoring. No intervention is 00:56:04.719 --> 00:56:06.420 needed. Skipping over the middle for a second, 00:56:06.480 --> 00:56:08.420 let's look at the other extreme. Category three 00:56:08.420 --> 00:56:10.440 is the absolute nightmare strip. To be category 00:56:10.440 --> 00:56:12.699 three, you must have absent variability, that 00:56:12.699 --> 00:56:15.039 completely slat ruler straight line combined 00:56:15.039 --> 00:56:17.599 with recurrent late decelerations or recurrent 00:56:17.599 --> 00:56:20.119 variable decelerations or severe bradycardia. 00:56:20.239 --> 00:56:23.039 or you see that lethal sinusoidal pattern. Yes. 00:56:23.539 --> 00:56:26.460 Category 3 is predictive of abnormal fetal acid 00:56:26.460 --> 00:56:30.320 -base status. The fetus is actively hypoxic and 00:56:30.320 --> 00:56:33.219 suffering from metabolic acidemia. The brain 00:56:33.219 --> 00:56:35.960 is starving. You must intervene aggressively, 00:56:36.639 --> 00:56:38.699 initiate intraderine resuscitation immediately, 00:56:39.300 --> 00:56:41.619 and prepare the operating room for an emergent, 00:56:41.639 --> 00:56:44.519 life -saving cesarean section. And category 2 00:56:44.519 --> 00:56:46.219 is essentially the catch -all for everything 00:56:46.219 --> 00:56:48.809 else in between. Yes. Category 2 is considered 00:56:48.809 --> 00:56:51.570 indeterminate. It's the gray area. It might show 00:56:51.570 --> 00:56:54.150 minimal variability, or it might show recurrent 00:56:54.150 --> 00:56:57.429 variable decelerations, but still maintain moderate 00:56:57.429 --> 00:56:59.829 variability. It's the warning track. So what's 00:56:59.829 --> 00:57:01.760 the nursing action for category 2? You don't 00:57:01.760 --> 00:57:04.099 necessarily rush the patient to the OR right 00:57:04.099 --> 00:57:06.739 that second, but you absolutely must implement 00:57:06.739 --> 00:57:09.380 corrective nursing measures, try to fix the underlying 00:57:09.380 --> 00:57:12.000 physiological issue, and watch the strip like 00:57:12.000 --> 00:57:14.840 a hawk to ensure it doesn't degrade into a category 00:57:14.840 --> 00:57:17.619 three. Before we move on to how we actually fix 00:57:17.619 --> 00:57:19.639 those issues, we need to lock in our pattern 00:57:19.639 --> 00:57:22.400 recognition for the decelerations. What is the 00:57:22.400 --> 00:57:24.460 standard mnemonic that every nursing student 00:57:24.460 --> 00:57:26.940 must memorize to match the deceleration to its 00:57:26.940 --> 00:57:29.380 physiological cause? The standard mnemonic used 00:57:29.380 --> 00:57:32.860 globally in nursing education is V -L -C -O -P. 00:57:33.239 --> 00:57:35.840 It lines up four letters with four other letters 00:57:35.840 --> 00:57:39.059 perfectly. V matches with C, matches with H. 00:57:39.139 --> 00:57:41.559 A matches with O -L, matches with P. Let's spell 00:57:41.559 --> 00:57:45.159 it out. V is for variable decelerations, which 00:57:45.159 --> 00:57:48.380 match with C for chord compression. E is for 00:57:48.380 --> 00:57:50.960 early decelerations, which match with H for head 00:57:50.960 --> 00:57:54.159 compression. A is for accelerations, which match 00:57:54.159 --> 00:57:58.869 with O for atyp. Okay, they are normal. L is 00:57:58.869 --> 00:58:01.409 for late decelerations, which match with P for 00:58:01.409 --> 00:58:05.829 placental insufficiency. V -L -C -C -E -H -A 00:58:05.829 --> 00:58:08.849 -O -L -P. If you memorize that, you will instantly 00:58:08.849 --> 00:58:11.250 recognize the physiological root cause of any 00:58:11.250 --> 00:58:13.250 monitor strip you are given. Let's give our five 00:58:13.250 --> 00:58:16.059 takeaways for fetal monitoring. Number one. Moderate 00:58:16.059 --> 00:58:18.719 variability is the best predictor of fetal oxygenation. 00:58:18.940 --> 00:58:20.960 Number two, accelerations are always good. Number 00:58:20.960 --> 00:58:23.460 three, early decelerations mean placental insufficiency 00:58:23.460 --> 00:58:26.260 and are highly dangerous. And number five, variable 00:58:26.260 --> 00:58:28.300 decelerations mean cord compression and look 00:58:28.300 --> 00:58:31.199 like abrupt V's or W's on the monitor. So let's 00:58:31.199 --> 00:58:33.420 put you in the scenario. You are standing at 00:58:33.420 --> 00:58:35.940 the bedside of a laboring patient. You are staring 00:58:35.940 --> 00:58:39.099 at the monitor screen. And suddenly you see it. 00:58:39.309 --> 00:58:42.010 The valuability goes completely flat. You start 00:58:42.010 --> 00:58:45.289 seeing deep, recurrent, smooth, late decelerations 00:58:45.289 --> 00:58:48.510 long after the contractions end. The baby is 00:58:48.510 --> 00:58:51.010 suffocating due to placental insufficiency. It 00:58:51.010 --> 00:58:53.909 is a category 3 tracing. What do you actually 00:58:53.909 --> 00:58:56.769 do? It's time for emergency protocols. Let's 00:58:56.769 --> 00:58:59.230 cover saving the day in trotterin resuscitation 00:58:59.230 --> 00:59:01.670 and emergencies. This is where critical thinking 00:59:01.670 --> 00:59:05.269 and rapid physical action save lives. When you 00:59:05.269 --> 00:59:07.590 see a non -reassuring fetal heart rate pattern, 00:59:07.690 --> 00:59:11.110 specifically late decelerations, prolonged decelerations, 00:59:11.269 --> 00:59:13.690 or severe variables. You do not just stand there 00:59:13.690 --> 00:59:15.610 and observe. You do not wait for the doctor to 00:59:15.610 --> 00:59:18.210 arrive. You independently initiate a bundle of 00:59:18.210 --> 00:59:20.849 rapid, targeted interventions called intrauterine 00:59:20.849 --> 00:59:23.880 resuscitation. The text defines this as a bundle 00:59:23.880 --> 00:59:26.320 of actions designed to maximize maternal cardiac 00:59:26.320 --> 00:59:28.980 output, maximize blood flow to the uterus, and 00:59:28.980 --> 00:59:31.260 maximize oxygen delivery across the placenta. 00:59:31.800 --> 00:59:34.360 We are trying to buy time and reverse the hypoxia 00:59:34.360 --> 00:59:36.760 before permanent brain damage occurs. There are 00:59:36.760 --> 00:59:40.280 four main interventions. Maternal repositioning, 00:59:40.440 --> 00:59:44.059 increasing IV fluids, administering oxygen, and 00:59:44.059 --> 00:59:47.429 discontinuing uterotonics. Let's explain the 00:59:47.429 --> 00:59:50.130 deeper why behind each one, because understanding 00:59:50.130 --> 00:59:52.349 the mechanism is how you remember them under 00:59:52.349 --> 00:59:55.250 extreme pressure. First, repositioning the mother. 00:59:55.440 --> 00:59:58.500 We touched on this with supine hypotension. If 00:59:58.500 --> 01:00:00.900 the mother is flat on her back, the vena cava 01:00:00.900 --> 01:00:04.000 is compressed. Turning the patient to a lateral 01:00:04.000 --> 01:00:06.559 side -lying position, either left or right, or 01:00:06.559 --> 01:00:09.079 even getting them up into a hands and knees posture, 01:00:09.639 --> 01:00:11.780 immediately shifts the massive weight of the 01:00:11.780 --> 01:00:14.420 gravid uterus off the major blood vessels. Which 01:00:14.420 --> 01:00:16.800 instantly restores venous return to her heart. 01:00:16.960 --> 01:00:19.940 Exactly. It maximizes maternal preload, which 01:00:19.940 --> 01:00:22.340 maximizes cardiac output, which dramatically 01:00:22.340 --> 01:00:24.619 increases the volume of blood being forced into 01:00:24.619 --> 01:00:27.250 the central pool. Furthermore, if the monitor 01:00:27.250 --> 01:00:29.849 is showing variable decelerations from cord compression, 01:00:30.590 --> 01:00:32.750 physically shifting the mother's position causes 01:00:32.750 --> 01:00:34.969 the baby to shift position inside the fluid. 01:00:35.050 --> 01:00:37.489 That makes sense. That movement often untangles 01:00:37.489 --> 01:00:39.449 the cord or takes the baby's heavy body weight 01:00:39.449 --> 01:00:41.809 off the compressed vessels, restoring fetal blood 01:00:41.809 --> 01:00:45.119 flow. Okay, second intervention. Increasing intravenous 01:00:45.119 --> 01:00:47.659 fluids. The nurse will open the IV roller clamp 01:00:47.659 --> 01:00:50.519 wide and administer a rapid fluid bolus of an 01:00:50.519 --> 01:00:53.179 isotonic crystalloid like lactated ringers or 01:00:53.179 --> 01:00:56.659 normal saline. Why? Because you want to rapidly 01:00:56.659 --> 01:00:59.699 and artificially expand the maternal intravascular 01:00:59.699 --> 01:01:02.380 blood volume. Because more volume equals more 01:01:02.380 --> 01:01:04.500 pressure. Precisely. You are filling the pipes. 01:01:04.760 --> 01:01:06.980 higher maternal blood pressure increases the 01:01:06.980 --> 01:01:09.219 hydrostatic force pushing blood through those 01:01:09.219 --> 01:01:12.059 tight constricted spiral arteries and into the 01:01:12.059 --> 01:01:15.960 intervillous space of the placenta. You are essentially 01:01:15.960 --> 01:01:18.780 force feeding blood to the placenta. Third intervention, 01:01:19.480 --> 01:01:22.619 administering oxygen. But there's a huge classic 01:01:22.619 --> 01:01:24.760 exam trap here that catches so many students. 01:01:25.000 --> 01:01:27.539 Yes. Do not ever choose the multiple choice answer 01:01:27.539 --> 01:01:30.159 that says apply two liters of oxygen via nasal 01:01:30.159 --> 01:01:33.119 cannula. That low flow rate is virtually nothing 01:01:33.119 --> 01:01:36.699 for a severely hypoxic fetus. Intrauterine resuscitation 01:01:36.699 --> 01:01:39.019 requires blasting the maternal pulmonary system 01:01:39.019 --> 01:01:41.619 with oxygen. You must apply a non -rebreather 01:01:41.619 --> 01:01:43.840 face mask with the oxygen flow meter cranked 01:01:43.840 --> 01:01:45.880 all the way up to 10 liters per minute. Why such 01:01:45.880 --> 01:01:48.320 a massive dose? Because you aren't just trying 01:01:48.320 --> 01:01:51.300 to saturate the mother's hemoglobin. Her hemoglobin 01:01:51.300 --> 01:01:55.360 is probably already 99 % saturated. You are trying 01:01:55.360 --> 01:01:57.960 to drastically increase the partial pressure 01:01:57.960 --> 01:02:01.019 of freely dissolved oxygen in her blood plasma. 01:02:02.159 --> 01:02:04.500 By hyper -oxygenating the maternal plasma, you 01:02:04.500 --> 01:02:07.340 create a massive diffusion gradient across the 01:02:07.340 --> 01:02:09.900 placental membrane, forcing whatever small amount 01:02:09.900 --> 01:02:12.360 of blood does make it to the placenta to offload 01:02:12.360 --> 01:02:14.800 a massive payload of oxygen to the baby. And 01:02:14.800 --> 01:02:18.000 the fourth intervention. Discontinue uterotonics. 01:02:18.119 --> 01:02:21.059 Yeah. This almost always means turning off the 01:02:21.059 --> 01:02:24.599 pitocin or synthetic oxytocin IV drip. Think 01:02:24.599 --> 01:02:26.800 back to our engine analogy and the hemodynamics 01:02:26.800 --> 01:02:29.280 of a contraction. The uterus is contracting, 01:02:29.539 --> 01:02:31.519 squeezing the spiral artery shut and cutting 01:02:31.519 --> 01:02:34.460 off the blood supply. If the baby is suffocating 01:02:34.460 --> 01:02:36.980 because of those mechanical squeezes, the absolute 01:02:36.980 --> 01:02:39.599 most logical, immediate thing to do is to stop 01:02:39.599 --> 01:02:41.480 the squeezing. Right. Turn off the oxytocin. 01:02:41.559 --> 01:02:43.340 You must turn off the pharmacological drug that 01:02:43.340 --> 01:02:45.239 is forcing the uterus to work. Give the muscle 01:02:45.239 --> 01:02:47.329 a break. Let the pool refill. But what if the 01:02:47.329 --> 01:02:50.590 mother isn't on pitocin? What if she isn't spontaneous 01:02:50.590 --> 01:02:52.989 tachycystala having seven contractions in 10 01:02:52.989 --> 01:02:55.289 minutes all on her own and the baby is crashing? 01:02:55.590 --> 01:02:58.389 You can't unplug her own brain. In that case, 01:02:58.449 --> 01:03:01.469 you have to use pharmacology to actively paralyze 01:03:01.469 --> 01:03:04.570 the myometrium, the uterine muscle. The provider 01:03:04.570 --> 01:03:07.329 will order a stat dose of a tocolytic medication. 01:03:07.889 --> 01:03:10.130 The most common one mentioned in the text is 01:03:10.130 --> 01:03:12.849 terbutylene. How does terbutylene stop a contraction? 01:03:13.050 --> 01:03:16.530 Tributylene is a beta -2 adrenergic agonist. 01:03:17.050 --> 01:03:19.050 It directly mimics the effects of adrenaline 01:03:19.050 --> 01:03:21.110 on the smooth muscle receptors of the uterus. 01:03:21.570 --> 01:03:24.210 When it binds, it triggers a cascade that pumps 01:03:24.210 --> 01:03:26.670 calcium out of the muscle cells, preventing the 01:03:26.670 --> 01:03:28.829 actin and myosin fibers from locking together. 01:03:29.070 --> 01:03:31.199 So it just freezes it. It essentially freezes 01:03:31.199 --> 01:03:33.539 the uterus, completely stopping the contractions. 01:03:33.940 --> 01:03:36.119 This allows the spiral arteries to dilate wide 01:03:36.119 --> 01:03:38.880 open, blood floods back into the placenta, and 01:03:38.880 --> 01:03:41.579 the baby is revived. It buys the surgical team 01:03:41.579 --> 01:03:44.159 time to prep for a C -section if needed. Okay, 01:03:44.199 --> 01:03:46.059 I'm going to throw a classic nursing student 01:03:46.059 --> 01:03:50.079 dilemma at you. Exams love prioritization questions. 01:03:50.179 --> 01:03:52.780 They always ask, what is the nurse's first priority 01:03:52.780 --> 01:03:55.800 action? In the real world, a team of nurses runs 01:03:55.800 --> 01:03:57.840 into the room and does all four of these things 01:03:57.840 --> 01:03:59.800 simultaneously. Oh yeah, it's a team effort. 01:04:00.380 --> 01:04:03.440 But on the NCLEX, you have to pick one. If my 01:04:03.440 --> 01:04:05.659 patient is having severe late decelerations, 01:04:05.820 --> 01:04:09.159 do I turn her, do I stop the oxytocin, do I hang 01:04:09.159 --> 01:04:12.679 the fluid, or do I slap the oxygen mask on her 01:04:12.679 --> 01:04:15.260 face first? It is the ultimate prioritization 01:04:15.260 --> 01:04:18.159 trap. When deciding what to do first, you must 01:04:18.159 --> 01:04:20.539 identify the root cause of the problem. You want 01:04:20.539 --> 01:04:22.960 to remove the primary stressor before you apply 01:04:22.960 --> 01:04:25.539 a physiological band -aid. Okay, so oxygen is 01:04:25.539 --> 01:04:27.679 a band -aid. Four fluids are a band -aid. Exactly. 01:04:27.719 --> 01:04:30.239 The primary stressor is mechanical. It is either 01:04:30.239 --> 01:04:32.679 the heavy uterus crushing the vena cava or the 01:04:32.679 --> 01:04:35.019 powerful contractions crushing the spiral arteries. 01:04:35.480 --> 01:04:38.559 Therefore, your absolute first simultaneous priority 01:04:38.559 --> 01:04:41.139 actions are repositioning the mother to release 01:04:41.139 --> 01:04:44.039 the vena cava and stopping the oxytocin infusion 01:04:44.039 --> 01:04:46.239 to stop the uterus. and squeezing. Remove the 01:04:46.239 --> 01:04:48.719 cause, then treat the symptom. Remove the mechanical 01:04:48.719 --> 01:04:51.500 cause of the suffocation first. Turn her and 01:04:51.500 --> 01:04:54.460 turn off the pit. Then you slap the oxygen on 01:04:54.460 --> 01:04:56.860 and open the fluids. That makes perfect logical 01:04:56.860 --> 01:05:00.960 sense. Now let's pivot to a very specific, terrifying 01:05:00.960 --> 01:05:03.920 physical emergency, heavily emphasized in the 01:05:03.920 --> 01:05:06.900 text. The umbilical cord prolapse. We touched 01:05:06.900 --> 01:05:08.699 on this during the rupture of membrane section. 01:05:09.119 --> 01:05:11.679 The water breaks. The heavy rush of fluids sweeps 01:05:11.679 --> 01:05:13.900 the umbilical cord down past the baby's head 01:05:13.900 --> 01:05:16.940 and into the vaginal canal. The baby's bony skull 01:05:16.940 --> 01:05:19.820 descends and physically crushes the cord against 01:05:19.820 --> 01:05:22.699 the mother's rigid pelvic bone. Blood flow stops 01:05:22.699 --> 01:05:25.440 instantly. This is not a slow decline. This is 01:05:25.440 --> 01:05:28.300 a dire, immediate life or death emergency. The 01:05:28.300 --> 01:05:30.760 moment that cord is crushed you will see a profound 01:05:30.760 --> 01:05:34.360 severe prolonged bradycardia or a massive variable 01:05:34.360 --> 01:05:36.679 deceleration on the fetal monitor that does not 01:05:36.679 --> 01:05:38.920 recover. The nurse sees the drop. They quickly 01:05:38.920 --> 01:05:40.980 perform a sterile vaginal exam to figure out 01:05:40.980 --> 01:05:43.800 what is wrong and their fingers feel a soft pulsating 01:05:43.800 --> 01:05:46.119 slippery tube sitting in the vaginal canal below 01:05:46.119 --> 01:05:48.179 the baby's head. What is the absolute priority 01:05:48.179 --> 01:05:51.599 action? The absolute priority is physical sustained 01:05:51.599 --> 01:05:55.449 mechanical action by the nurse. If you feel that 01:05:55.449 --> 01:05:58.050 pulsating cord, you do not remove your hand from 01:05:58.050 --> 01:06:00.190 the vagina. You just stay there. You push your 01:06:00.190 --> 01:06:02.949 fingers past the slick cord, you place your hand 01:06:02.949 --> 01:06:06.090 firmly against the baby's hard skull, and you 01:06:06.090 --> 01:06:09.070 physically, forcefully push the head upward off 01:06:09.070 --> 01:06:11.969 the cord, back up toward the uterus, and you 01:06:11.969 --> 01:06:14.190 hold it there with all your strength. You just 01:06:14.190 --> 01:06:16.829 hold the baby's head up. For how long? Until 01:06:16.829 --> 01:06:20.050 the baby is delivered. You are now the only thing 01:06:20.050 --> 01:06:22.769 keeping blood flowing to that baby's brain. But 01:06:22.769 --> 01:06:24.789 I need to tell the doctor. I need to call the 01:06:24.789 --> 01:06:27.110 charge nurse. I need to set up the OR. This is 01:06:27.110 --> 01:06:30.969 a major exam trap. Do not ever, under any circumstances, 01:06:31.190 --> 01:06:33.590 leave a patient with a prolapsed cord to go get 01:06:33.590 --> 01:06:36.150 help. You use your other hand to hit the emergency 01:06:36.150 --> 01:06:38.449 call bell on the wall. You yell at the top of 01:06:38.449 --> 01:06:40.269 your lungs for someone in the hallway to notify 01:06:40.269 --> 01:06:42.909 the provider and prep the OR. So you literally 01:06:42.909 --> 01:06:46.480 don't move. But you do not take your internal 01:06:46.480 --> 01:06:49.820 hand out. You will literally climb onto the bed, 01:06:50.280 --> 01:06:52.420 right on the mattress with the patient, keeping 01:06:52.420 --> 01:06:54.699 your hand inside the vagina, pushing the head 01:06:54.699 --> 01:06:57.440 up as they quickly roll the bed down the hall 01:06:57.440 --> 01:07:00.059 and right into the operating room. You stay there 01:07:00.059 --> 01:07:02.500 while they drip the patient and you only remove 01:07:02.500 --> 01:07:05.099 your hand when the surgeon physically pulls the 01:07:05.099 --> 01:07:07.719 baby out from above through the abdominal incision. 01:07:08.630 --> 01:07:11.750 That is an incredible visual of nursing responsibility. 01:07:12.230 --> 01:07:14.349 While you are holding the head up, the other 01:07:14.349 --> 01:07:16.070 nurses in the room are positioning the patient 01:07:16.070 --> 01:07:18.849 to help you. What position is best for a prolapsed 01:07:18.849 --> 01:07:22.150 cord? You need to enlist gravity to help pull 01:07:22.150 --> 01:07:24.809 the heavy baby back up into the abdomen, away 01:07:24.809 --> 01:07:26.989 from the pelvic choke point. You immediately 01:07:26.989 --> 01:07:28.590 drop the head of the bed and put the patient 01:07:28.590 --> 01:07:31.530 in a steep, trendelenburg position head, way 01:07:31.530 --> 01:07:33.730 down, feet way up in the air. What if the bed 01:07:33.730 --> 01:07:36.480 is broken or won't tilt? Then you instruct the 01:07:36.480 --> 01:07:38.679 patient to immediately flip over onto their hands 01:07:38.679 --> 01:07:40.619 and knees with their chest resting flat on the 01:07:40.619 --> 01:07:43.179 mattress and their pelvis high in the air. This 01:07:43.179 --> 01:07:46.360 is called the knee -chest posture. Gravity pulls 01:07:46.360 --> 01:07:49.019 the fetus out of the pelvis, relieving the fatal 01:07:49.019 --> 01:07:52.639 pressure on the cord. There is one more highly 01:07:52.639 --> 01:07:55.119 specific intervention the text mentions for cord 01:07:55.119 --> 01:07:57.460 compression. Let's say the water has broken, 01:07:57.519 --> 01:08:00.440 but the fluid is just a really low oligohydramnios. 01:08:00.980 --> 01:08:03.659 The cord hasn't prolapsed. but it's getting squished 01:08:03.659 --> 01:08:05.420 with every single contraction because there is 01:08:05.420 --> 01:08:08.280 no water to cushion it, causing severe recurrent 01:08:08.280 --> 01:08:11.199 variable decelerations. In that specific scenario, 01:08:11.320 --> 01:08:13.539 the provider might order an amnio -infusion. 01:08:14.159 --> 01:08:17.159 The nurse assists in placing an entroterine pressure 01:08:17.159 --> 01:08:19.800 catheter, the IUPC we talked about earlier. But 01:08:19.800 --> 01:08:21.979 instead of just measuring pressure, they hook 01:08:21.979 --> 01:08:25.460 a bag of warm, sterile normal saline to the tubing 01:08:25.460 --> 01:08:28.979 and literally pump fluid backward into the uterine 01:08:28.979 --> 01:08:31.159 cavity. You are artificially refilling the swimming 01:08:31.159 --> 01:08:34.060 pool. Exactly. You are replacing the lost amniotic 01:08:34.060 --> 01:08:36.420 fluid to create a hydrostatic cushion, giving 01:08:36.420 --> 01:08:39.189 the umbilical cord room to float freely. without 01:08:39.189 --> 01:08:41.390 getting crushed by the fetal body parts during 01:08:41.390 --> 01:08:43.989 a contraction. Let's give our final five takeaways 01:08:43.989 --> 01:08:46.689 for the emergency section. Number one, first 01:08:46.689 --> 01:08:49.270 action for fetal distress is usually repositioning 01:08:49.270 --> 01:08:52.439 to the side. Number two, always stop oxytocin 01:08:52.439 --> 01:08:54.800 or utero tonics if there are late decelerations 01:08:54.800 --> 01:08:57.680 or tachycystal. Number three, tocolytics like 01:08:57.680 --> 01:09:00.420 tributylene are used to relax the uterus if it 01:09:00.420 --> 01:09:04.000 won't stop contracting. Number four, for a prolapsed 01:09:04.000 --> 01:09:06.819 cord, manually elevate the fetal head and never 01:09:06.819 --> 01:09:10.420 let go. And number five, amnioinfusion can be 01:09:10.420 --> 01:09:13.220 used for recurrent variable decelerations to 01:09:13.220 --> 01:09:16.010 float the cord. Incredible. the mechanics of 01:09:16.010 --> 01:09:18.029 labor and the interventions required to manage 01:09:18.029 --> 01:09:20.989 it are so deeply intertwined. Which brings us 01:09:20.989 --> 01:09:23.449 to our conclusion. We have covered an immense 01:09:23.449 --> 01:09:25.909 amount of clinical ground today. We started with 01:09:25.909 --> 01:09:28.250 the foundational mechanics, passenger, passage, 01:09:28.489 --> 01:09:31.590 powers, position, psyche. The five P's. We unpacked 01:09:31.590 --> 01:09:33.510 the anatomy of the fetal skull and the maternal 01:09:33.510 --> 01:09:36.109 pelvis. We learned why cervical transformation 01:09:36.109 --> 01:09:39.210 is the only objective proof of true labor. We 01:09:39.210 --> 01:09:41.149 assessed the cervix and fluid, understanding 01:09:41.149 --> 01:09:43.770 the critical nature of eschel station, the dangers 01:09:43.770 --> 01:09:46.609 of meconium aspiration, and the immunology behind 01:09:46.609 --> 01:09:49.229 GBS sepsis. We really went deep. We learned how 01:09:49.229 --> 01:09:51.029 to read the physical engine of labor through 01:09:51.029 --> 01:09:53.289 Leopold maneuvers and contraction hemodynamics, 01:09:53.869 --> 01:09:56.739 distinguishing between external TOCO timers and 01:09:56.739 --> 01:09:59.680 internal IUPC pressure sensors. We broke down 01:09:59.680 --> 01:10:02.220 the holy grail of fetal heart rate monitoring, 01:10:02.579 --> 01:10:04.859 dissecting the autonomic nervous system's control 01:10:04.859 --> 01:10:07.180 over variability, and matching the physiology 01:10:07.180 --> 01:10:10.670 of decelerations using veal entropy. And finally, 01:10:10.970 --> 01:10:13.369 we learned the exact pharmacological and mechanical 01:10:13.369 --> 01:10:16.630 mechanisms to act decisively during intrauterine 01:10:16.630 --> 01:10:19.189 resuscitation and cord prolapse emergencies. 01:10:19.430 --> 01:10:22.449 And if there is one overarching grand unifying 01:10:22.449 --> 01:10:25.090 theme to synthesize this entire complex journey, 01:10:25.729 --> 01:10:29.489 it is hemodynamics. Blood flow. Always. Every 01:10:29.489 --> 01:10:32.210 single physical assessment, every squiggly line 01:10:32.210 --> 01:10:34.630 on a monitor strip, and every emergency intervention 01:10:34.630 --> 01:10:37.250 in obstetric nursing is ultimately about one 01:10:37.250 --> 01:10:39.710 simple critical goal. Ensuring the maternal blood 01:10:39.710 --> 01:10:41.630 pressure is high enough to reach the placenta, 01:10:41.970 --> 01:10:43.829 and ensuring the placenta and umbilical cord 01:10:43.829 --> 01:10:46.130 are clear enough to deliver that oxygen to the 01:10:46.130 --> 01:10:48.829 fetal brain. Supine hypotension cuts off blood. 01:10:49.510 --> 01:10:51.689 Tachycystole cuts off blood. Cord compression 01:10:51.689 --> 01:10:54.430 cuts off blood. Your primary job as a clinical 01:10:54.430 --> 01:10:57.090 nurse is to understand the plumbing and maintain 01:10:57.090 --> 01:10:59.800 that flow. And as we wrap up, I want to ask you 01:10:59.800 --> 01:11:01.960 for a final provocative thought, something for 01:11:01.960 --> 01:11:04.960 our listener. The future nurse mull over as they 01:11:04.960 --> 01:11:07.060 close their textbooks, head into their exams, 01:11:07.300 --> 01:11:09.279 or walk onto the unit for their next clinical 01:11:09.279 --> 01:11:12.180 shift. We spent this entire time talking about 01:11:12.180 --> 01:11:14.819 how to read electronic monitors, track contractions, 01:11:15.239 --> 01:11:18.100 and react to jagged lines on graph paper. What 01:11:18.100 --> 01:11:20.659 is the danger in relying too heavily on the machine? 01:11:21.069 --> 01:11:23.369 That is the perfect question to ground us at 01:11:23.369 --> 01:11:25.810 the end, because in modern obstetrics we focus 01:11:25.810 --> 01:11:28.090 so intensely on the electronic fetal monitor. 01:11:28.550 --> 01:11:31.050 We memorize the categories, we analyze the moderate 01:11:31.050 --> 01:11:33.909 variability, we obsess over the exact symmetrical 01:11:33.909 --> 01:11:36.630 shape of a deceleration. But you must always 01:11:36.630 --> 01:11:38.750 remember the monitor is just a piece of paper. 01:11:38.920 --> 01:11:41.300 It is just a shadow on the wall reflecting a 01:11:41.300 --> 01:11:44.479 much more complex biological reality. The true 01:11:44.479 --> 01:11:46.819 clinical picture is the living, breathing human 01:11:46.819 --> 01:11:49.500 being lying in the bed. The patient. Exactly. 01:11:49.779 --> 01:11:51.560 If you ever find yourself in a situation where 01:11:51.560 --> 01:11:53.479 you have to choose between treating the monitor 01:11:53.479 --> 01:11:55.520 and treating the patient, look at your patient. 01:11:55.979 --> 01:11:58.479 How is her breathing? Is she shivering? What 01:11:58.479 --> 01:12:00.960 is her subjective pain telling you? Is her psyche 01:12:00.960 --> 01:12:04.279 terrified or is she calm and coping? The best, 01:12:04.359 --> 01:12:07.300 most elite OB nurses in the world don't just 01:12:07.300 --> 01:12:10.439 read strips. They read people. The monitor simply 01:12:10.439 --> 01:12:13.180 tells you the what. Your clinical judgment looking 01:12:13.180 --> 01:12:15.359 directly at the patient tells you the why and 01:12:15.359 --> 01:12:17.939 the how. Treating the patient, not the monitor. 01:12:18.060 --> 01:12:19.840 Yeah. It brings us right back to where we started 01:12:19.840 --> 01:12:22.720 with the x -ray analogy. The human body isn't 01:12:22.720 --> 01:12:25.520 a simple machine, and labor isn't a clean binary 01:12:25.520 --> 01:12:29.079 picture. It's muddy, it's dynamic, and it requires 01:12:29.079 --> 01:12:31.760 brilliant, adaptable, critically thinking nurses 01:12:31.760 --> 01:12:34.579 to guide two patients safely through it. To the 01:12:34.579 --> 01:12:37.149 listener, to the future nurse. Understand the 01:12:37.149 --> 01:12:40.210 physiology, master the hemodynamics, trust your 01:12:40.210 --> 01:12:42.189 training, and approach your exams of your future 01:12:42.189 --> 01:12:44.590 patients with absolute confidence. You've got 01:12:44.590 --> 01:12:47.489 this. You absolutely do. Stay curious, stay sharp, 01:12:47.710 --> 01:12:48.189 and keep learning.