A nurse is monitoring a 32-year-old primigravida at 39 weeks gestation and observes the following fetal heart rate (FHR) pattern: baseline FHR of 140 bpm with recurrent variable decelerations dropping to 70 bpm lasting 60-90 seconds, slow return to baseline, and minimal variability. What is the most appropriate immediate nursing action?
1Change the client's position to left lateral and administer oxygen via face mask at 8-10 L/min✓ 정답
2Increase the IV fluid rate and prepare for immediate cesarean delivery
3Discontinue oxytocin infusion and notify the healthcare provider
4Perform a vaginal examination to assess for cord prolapse
해설
Variable decelerations with slow return and minimal variability suggest severe cord compression. Immediate actions are position change and oxygen to improve fetal oxygenation. Other options are not first-line interventions.
Core Nursing Explanation
This question tests your ability to recognize a non-reassuring fetal heart rate (FHR) pattern and apply the correct sequence of intrauterine resuscitation measures.
Key Concept Analysis
The pattern described is classic for severe variable decelerations.
Variable Decelerations: These are abrupt drops in FHR (often V- or U-shaped) caused by umbilical cord compression. The deceleration to 70 bpm lasting 60-90 seconds is significant.
Slow Return to Baseline & Minimal Variability: These are the most concerning features. A slow return suggests the compression is prolonged, and minimal variability indicates the fetus is not tolerating the stress well and its autonomic nervous system is compromised. Together, they signal Key Point!potential fetal hypoxia and the need for immediate intervention to improve uteroplacental perfusion and fetal oxygenation.
Answer Rationale
The first-line, immediate nursing actions for suspected cord compression or non-reassuring FHR are non-invasive measures to improve fetal status:
Position Change (Left Lateral): This displaces the uterus off the maternal great vessels (aorta and inferior vena cava), improving maternal cardiac output and blood flow to the placenta.
Administer Oxygen: Increasing maternal oxygen saturation increases the oxygen available for diffusion across the placenta to the fetus.
These actions are fast, safe, and can often correct the pattern. The nurse would then continue monitoring to see if the pattern improves. If it does not improve after these measures, then the nurse would notify the healthcare provider for further orders (which may include the interventions in other options).
Distractor Analysis
Watch out for confusion! Option ② (Increase IV fluids & prepare for C-section): While increasing IV fluids can be part of intrauterine resuscitation, preparing for an immediate cesarean is a provider decision after other measures fail. It is not the nurse's first independent action.
Option ③ (Discontinue oxytocin): This is the correct first action for late decelerations (which indicate uteroplacental insufficiency), not for variable decelerations. The scenario does not state oxytocin is being used.
Option ④ (Perform vaginal exam): This is indicated if you suspect umbilical cord prolapse (e.g., if decelerations occurred after rupture of membranes with gush of fluid). However, the first action is still to relieve pressure by changing position (often to Trendelenburg or knee-chest) while calling for help. A vaginal exam is not the singular "most appropriate immediate" action.
Related Concepts
The nurse's role is to initiate intrauterine resuscitation and reassess. The sequence is often remembered as "D.O.T.S." or similar mnemonics: Discontinue oxytocin (if running), Oxygen, Turn (position change), and increase IV fluids (Saline bolus). Notification of the provider occurs concurrently or immediately after initiating these measures.
Concept Summary
FHR Pattern
Cause
Key Features
First Nursing Action
Variable Decelerations
Umbilical cord compression
Abrupt drop, variable shape, often quick recovery
Change maternal position (left lateral, knee-chest)
To confirm diagnosis; done while preparing for emergency delivery
Anatomy, Physiology & Pharmacology Points
Physiology: The left lateral position moves the gravid uterus off the inferior vena cava, preventing supine hypotensive syndrome and maximizing placental blood flow.
Pharmacology:Oxytocin (Pitocin) increases uterine contraction frequency and strength. Overstimulation can reduce resting time between contractions, leading to fetal hypoxia.
FHR Terminology:Baseline Variability reflects an intact fetal central nervous system. Minimal variability is a sign of fetal sleep, sedation, or acidosis/hypoxia.
Memory Tips
Variable = Cord: Think "V" for Variable and "V" for Vessel (umbilical cord vessel compression).
Late = Placenta: Think "L" for Late and "L" for Lazy placenta (insufficiency).
First Actions Mnemonic:O.T. (Oxygen, Turn). Always start with these two.
High-Frequency NCLEX Topics
FHR interpretation is a must-know area. The NCLEX loves to test:
1. Differentiating deceleration types (Early vs. Late vs. Variable).
2. Identifying the priority nursing action for a given pattern.
3. Understanding the physiological cause of each pattern.
Watch Out for Question Variations!
If the scenario adds "oxytocin infusion is running," the correct first action for variable decels might still be position change/O2, but discontinuing oxytocin becomes a concurrent action.
If the pattern does not improve after position change and O2, the next step is always to notify the healthcare provider.
The question could ask for the underlying cause (cord compression) instead of the intervention.
Nursing Clinical Practice GuideClinical Scenario
You are the labor nurse for Maria, G1P0 at 39 weeks. Her membranes ruptured spontaneously 2 hours ago. You are reviewing the external fetal monitor tracing and see a baseline of 142. With each contraction, the FHR plummets from 142 to 80 over 15 seconds, stays low for 70 seconds, and then slowly climbs back over 45 seconds. The line between decelerations looks almost flat (minimal variability). Maria is lying supine.
Nursing Intervention Strategy
1. Immediate Action (Within seconds): "Maria, I need you to roll onto your left side for me, please." Assist her into left lateral position. Simultaneously, apply a non-rebreather face mask at 10 L/min.
2. Assessment & Communication: Check maternal blood pressure and pulse. Inform the charge nurse and the healthcare provider immediately: "I'm seeing recurrent severe variable decelerations with minimal variability. I've repositioned left lateral and started O2. Tracing ongoing."
3. Re-evaluation (After 2-3 minutes): Observe the monitor. Has variability improved? Are decelerations less severe or frequent? If yes, continue monitoring closely. If no, prepare for next steps per provider order (may include internal monitoring, IV fluid bolus, or preparation for operative delivery).
4. Patient Support: Explain to Maria what is happening in a calm manner. "We're just changing your position and giving you some extra oxygen to help your baby. The monitor is letting us keep a very close watch."
Patient Safety and Precautions
Never leave a patient with a non-reassuring FHR pattern unattended.
Ensure oxygen is connected and flowing correctly; the reservoir bag should inflate.
If cord prolapse is suspected (e.g., deceleration after ROM with visible or palpable cord), maintain pressure off the cord (use knee-chest or Trendelenburg) and call for an immediate emergency cesarean delivery—this is a true obstetric emergency.
Nursing Procedure & Medication FlowProcedure: Intrauterine Resuscitation
1. Identify non-reassuring pattern.
2. Call for help (charge nurse/provider).
3. Position change (Left lateral is first-line; consider other positions like right lateral, knee-chest).
4. Administer oxygen via non-rebreather mask at 8-10 L/min.
5. Assess for and correct maternal hypotension (IV fluid bolus of Lactated Ringer's).
6. If oxytocin is infusing, discontinue it.
7. Consider tocolytic (like terbutaline) per order to relax the uterus.
8. Prepare for possible operative vaginal delivery or cesarean section.
9. Document everything: time, pattern observed, interventions initiated, patient response, and notifications made.
A Word from Your Senior Nurse
"Fetal monitoring can feel like reading a foreign language at first, but remember—you are the baby's first advocate on the outside. Your quick, calm actions in response to a concerning tracing can make all the difference. In clinicals and on the NCLEX, always think: 'What is the safest, fastest thing I can do right now to improve oxygen delivery?' That thought process will almost always lead you to reposition and give O2. Master the 'why' behind each deceleration, and you'll not only answer questions correctly, you'll provide excellent, evidence-based care at the bedside."
Variable Decelerations — Abrupt, visually apparent decreases in FHR from baseline. The depth and duration are variable, often shaped like a "V" or "U." Caused by transient umbilical cord compression. Nursing action: Change maternal position.
Minimal Variability — Amplitude range of FHR fluctuations is undetectable or ≤5 beats per minute. Can be a sign of fetal sleep, CNS depressants, or fetal acidosis/hypoxia. Requires evaluation, especially if persistent.
Intrauterine Resuscitation — A series of nursing/medical interventions aimed at improving fetal oxygenation and correcting non-reassuring FHR patterns. Includes position change, oxygen administration, IV fluids, and discontinuing oxytocin.
Umbilical Cord Compression — A common cause of variable decelerations. Occurs when the umbilical cord is pressed between the fetal body and the uterine wall, maternal pelvis, or during a contraction, reducing blood flow.
Left Lateral Position — A positioning intervention where the pregnant person lies on their left side. This displaces the uterus off the inferior vena cava and aorta, improving venous return, cardiac output, and uteroplacental blood flow.