A primigravida at 39 weeks gestation is in active labor. Her cervix is 6 cm dilated, 80% effaced, and the fetal head is at -1 station. The fetal heart rate shows a baseline of 140 bpm with moderate variability. Suddenly, the nurse observes a prolonged deceleration lasting 3 minutes with the fetal heart rate dropping to 80 bpm. What is the nurse's priority action?
Emergency fetal heart rate management during active labor
1Document the finding and continue monitoring
2Increase the oxytocin infusion rate to strengthen contractions
3Change the mother's position to left lateral and administer oxygen✓ 정답
4Prepare for immediate cesarean delivery
해설
Prolonged deceleration to 80 bpm indicates severe fetal hypoxia requiring immediate intervention. The priority is to improve fetal oxygenation by changing the mother's position to left lateral and administering oxygen. Other options are inappropriate as they delay care or worsen the situation.
Core Nursing ExplanationKey Concept Analysis: This question tests the priority nursing intervention for a Prolonged deceleration in fetal heart rate (FHR) during active labor. A prolonged deceleration is a visually apparent decrease in the FHR from the baseline that lasts ≥2 minutes but <10 minutes. A drop to 80 bpm for 3 minutes is a critical sign of Fetal hypoxia (inadequate oxygen supply to the fetus). The priority is to immediately improve uteroplacental blood flow and maternal-fetal oxygen exchange.
Answer Rationale: Key Point! The first-line, immediate nursing interventions for any non-reassuring FHR pattern are the "Intrauterine Resuscitation" measures. These include: 1) Position change (to left lateral to relieve potential Supine hypotensive syndrome and improve venous return/cardiac output), 2) Administering oxygen to the mother via face mask (typically 8-10 L/min) to increase maternal oxygen saturation and, consequently, fetal oxygen availability, 3) Discontinuing any labor-stimulating agents (like oxytocin), and 4) Increasing IV fluids. Option ③ directly implements the first two critical, non-invasive steps.
Distractor Analysis:
Watch out for confusion! Option ①: "Document and continue monitoring" is incorrect because it represents a dangerous delay in intervention during an acute, potentially life-threatening event for the fetus. Documentation is essential but never the priority over active intervention in an emergency.
Option ②: "Increase oxytocin" is contraindicated and dangerous. Oxytocin (Pitocin) increases uterine contractions, which can further compromise uteroplacental perfusion and worsen fetal hypoxia. The correct action is to stop the oxytocin infusion.
Option ④: "Prepare for immediate cesarean delivery" is a potential next step if intrauterine resuscitation measures fail to correct the FHR pattern. However, it is not the first or priority action. The nurse must first attempt to improve the fetal environment. Jumping straight to preparation for surgery bypasses essential, potentially corrective interventions.
Related Concepts: This scenario integrates knowledge of FHR monitoring, stages of labor, and emergency obstetric nursing. Understanding the mechanisms of fetal hypoxia (e.g., cord compression, uteroplacental insufficiency) is key. The nursing process here is rapid: Assessment (recognizing the prolonged deceleration) → Diagnosis (risk for impaired fetal gas exchange) → Planning/Implementation (immediate intrauterine resuscitation).
Concept Summary
Concept
Description
Nursing Implication
Prolonged Deceleration
FHR drop ≥2 min but <10 min below baseline.
Sign of acute fetal stress/hypoxia. Requires immediate intervention.
Intrauterine Resuscitation
First-line measures to improve fetal oxygenation.
Position change (left lateral), O2 admin, stop oxytocin, IV bolus.
Fetal Station
Level of fetal head in pelvis (-3 to +3). -1 is engaged but high.
Helps assess labor progress. Not the primary concern during deceleration.
Moderate Variability
Normal, reassuring FHR characteristic before deceleration.
Indicates intact fetal central nervous system. Its loss would be more concerning.
Side-by-Side Comparison!
FHR Pattern
Definition
Possible Cause
Nursing Priority
Prolonged Deceleration
Drop ≥2 min, <10 min.
Cord compression, hypotension, abruption.
Immediate intrauterine resuscitation.
Late Deceleration
Gradual drop after contraction peak, slow recovery.
Position change (often Trendelenburg/knee-chest) to relieve cord pressure.
Anatomy, Physiology & Pharmacology Points
Physiology: Left lateral position displaces the uterus off the maternal inferior vena cava and aorta, improving venous return, cardiac output, and thus uteroplacental blood flow.
Pharmacology: Oxytocin stimulates uterine contractions. In the presence of a non-reassuring FHR, it must be discontinued to reduce uterine activity and allow for better fetal perfusion during relaxation periods.
Oxygen Administration: Increasing maternal FiO2 (Fraction of inspired oxygen) raises the oxygen gradient across the placenta, facilitating oxygen transfer to the hypoxic fetus.
Memory Tips
Acronym for Intrauterine Resuscitation: "P.O.S.T." Position (Left lateral) Oxygen (8-10 L/min via mask) Stop (oxytocin/other stimulants) Transfusion (IV fluid bolus, e.g., Lactated Ringer's)
Think: "First, help the baby where it is." Before rushing to delivery, try to improve the intrauterine environment.
High-Frequency NCLEX Topics
This is a classic High Yield priority-setting question. The NCLEX-RN loves to test:
Recognizing non-reassuring vs. reassuring FHR patterns.
Knowing the exact sequence of nursing actions for fetal distress.
Differentiating between actions the nurse can take independently (position, O2) and those requiring a provider order (prepping for C-section).
Watch Out for Question Variations!
If the deceleration recovers after position change/O2: The question might then ask for the next action (e.g., "notify the provider," "continue monitoring closely").
If the deceleration persists despite interventions: The priority shifts to notifying the provider and preparing for expedited/operative delivery.
If oxytocin is infusing: The correct action will always include "discontinue the oxytocin infusion" as part of the priority.
Nursing Clinical Practice GuideClinical Scenario: You are the labor & delivery nurse for Maria, a 25-year-old G1P0 at 39 weeks. She is receiving IV fluids and has an external fetal monitor in place. As you are charting, you hear the FHR alarm. The monitor shows a prolonged deceleration from a baseline of 140 bpm down to 80 bpm, and it's not recovering.
Nursing Intervention Strategy:
Immediate Action (Seconds 0-30): Call out to your team, "I need help in here!" While moving, instruct the patient, "Maria, I need you to roll onto your left side, right now." Simultaneously, reach for the non-rebreather oxygen mask and place it on her face at 10 L/min. Assess for any obvious cause (e.g., check for a prolapsed cord).
Secondary Actions (Next 1-2 Minutes): If an oxytocin infusion is running, stop it. Increase the rate of the primary IV line (e.g., Lactated Ringer's) to a rapid bolus per protocol (e.g., 500-1000 mL bolus). Perform a vaginal exam only if you suspect cord prolapse and are trained to do so.
Communication & Escalation: Have another team member notify the provider (OB/GYN, midwife) immediately with a clear SBAR report: Situation (prolonged deceleration to 80 bpm), Background (39-week primigravida, 6 cm), Assessment (unresponsive to initial position/O2), Recommendation (provider needed at bedside, may need preparation for OR).
Ongoing Monitoring & Preparation: Continuously monitor the FHR for recovery. If it does not recover, prepare for possible emergency cesarean delivery: ensure consent is signed, alert the OR team, and start preoperative preparations as per unit protocol.
Patient Safety and Precautions:
Never leave the patient alone during a prolonged deceleration.
Contraindication: Do not place the mother in supine position. Avoid the knee-chest position unless variable decelerations (suggesting cord compression) are the primary pattern; for prolonged decels of unclear origin, left lateral is safest.
Medication Caution: Oxytocin is a high-alert medication. Know your facility's protocol for stopping it during non-reassuring FHR patterns.
Nursing Procedure & Medication FlowProcedure: Administering Oxygen for Fetal Distress
Grab a non-rebreather mask (or tight face mask if not available).
Set the oxygen flowmeter to 10 liters per minute.
Ensure the reservoir bag is inflated.
Place the mask securely over the patient's nose and mouth, adjusting the nose piece for a snug fit.
Explain to the patient: "This is oxygen to help your baby. Keep the mask on."
Document the time oxygen was initiated and the flow rate.
Medication: Oxytocin (Pitocin) Management
Action During Distress: Immediately turn the IV pump off or clamp the oxytocin infusion line at the Y-site closest to the patient.
Do NOT slow it down; stop it completely.
Maintain the primary IV line with plain fluid (without oxytocin) to keep venous access open for fluids or emergency medications.
A Word from Your Senior Nurse
"In the chaos of a deceleration, your calm, systematic response is everything. Remember your ABCs adapted for two: Airway & Alignment (maternal position), Breathing (oxygen for mom), Circulation (IV fluids for mom, which is circulation for baby). You are the first responder for that baby. Mastering this sequence isn't just for the test; it's a muscle memory you build to act decisively when seconds count. In clinicals, always ask your preceptor to walk you through the unit's specific fetal emergency protocol. Knowing where the oxygen tubing is, how to stop the pump quickly, and who to call can make all the difference."