A primigravida at 39 weeks gestation is in active labor. Her… | 마이메르시 MyMerci
Maternal Newborn Health
문제

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
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.

심화 해설

Core Nursing Explanation Key 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

임상 시나리오

Nursing Clinical Practice Guide Clinical 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:
  1. 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).
  2. 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.
  3. 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).
  4. 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 Flow Procedure: Administering Oxygen for Fetal Distress
  1. Grab a non-rebreather mask (or tight face mask if not available).
  2. Set the oxygen flowmeter to 10 liters per minute.
  3. Ensure the reservoir bag is inflated.
  4. Place the mask securely over the patient's nose and mouth, adjusting the nose piece for a snug fit.
  5. Explain to the patient: "This is oxygen to help your baby. Keep the mask on."
  6. 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."

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