A nurse is caring for a laboring client at 40 weeks gestation. The fetal heart rate monitor shows late decelerations with each contraction, and the baseline fetal heart rate has dropped from 140 bpm to 110 bpm over the past 30 minutes. The client is currently in the supine position. What is the nurse's priority intervention?
1Administer oxygen at 8-10 L/min via face mask
2Increase the rate of intravenous fluid infusion
3Prepare for immediate cesarean delivery
4Reposition the client to left lateral position✓ 정답
해설
Late decelerations with a dropping baseline indicate fetal hypoxia due to uteroplacental insufficiency. Repositioning to left lateral is the priority to relieve aortocaval compression and improve placental perfusion. Oxygen and fluids are secondary, and cesarean is reserved if conservative measures fail.
Core Nursing ExplanationKey Concept Analysis: This question assesses the priority nursing intervention for Late decelerations with a falling baseline fetal heart rate (FHR). This pattern is a classic sign of Uteroplacental insufficiency, where the placenta cannot deliver enough oxygen to the fetus, especially during contractions. The client being in the supine position is a critical clue, as it can cause Supine hypotensive syndrome (aortocaval compression), where the gravid uterus compresses the mother's major blood vessels, reducing venous return, cardiac output, and ultimately, Key Point!uterine blood flow and placental perfusion.
Answer Rationale: The priority is to correct the reversible cause. Key Point!Repositioning the client to the left lateral position is the first and fastest intervention to relieve aortocaval compression, improve maternal circulation, and enhance placental blood flow. This simple action can often resolve the late decelerations without further intervention. It is the foundational step upon which all other actions (oxygen, fluids) depend for maximum effectiveness.
Distractor Analysis:
• Watch out for confusion! While Administering oxygen (Option 1) is a correct and important supportive measure to increase maternal oxygen saturation and fetal oxygen availability, it is a secondary intervention. Giving oxygen to a mother whose blood flow to the placenta is compromised is less effective if the primary problem of poor perfusion isn't fixed first.
• Watch out for confusion!Increasing IV fluids (Option 2) is also a correct intervention to support maternal intravascular volume and cardiac output, but it is not the immediate priority. Repositioning is instantaneous, while increasing fluids takes time to have a hemodynamic effect.
• Watch out for confusion!Preparing for cesarean delivery (Option 3) is a definitive intervention for persistent, non-reassuring fetal status that does not improve with conservative measures. The scenario does not yet indicate that repositioning, oxygen, and fluids have been attempted and failed. The nurse's role is to initiate first-line, non-invasive interventions before escalating to surgical preparation.
Related Concepts: This scenario tests the "ABC" (Airway, Breathing, Circulation) principle adapted to obstetrics. Here, the "C" for Circulation (specifically, uteroplacental circulation) is the primary issue. The nursing process requires assessment (identifying the pattern and maternal position) and immediate implementation of the simplest, least invasive corrective action.
Concept Summary
• Late Decelerations: Gradual decrease in FHR beginning at the peak of a contraction, with the lowest point after the peak. Caused by uteroplacental insufficiency.
• Non-Reassuring FHR Pattern: Includes late decelerations, bradycardia (baseline 110-160 bpm), minimal variability, or prolonged decelerations.
• First-Line Intrauterine Resuscitation Measures: Remember the mnemonic "LOVE" – Lateral position, Oxygen, Volume (IV fluids), Eliminate pitocin (if infusing).
Side-by-Side Comparison!
FHR Deceleration Type
Shape & Timing
Primary Cause
Nursing Implication
Early Deceleration
Mirror image of contraction. Nadir (lowest point) occurs at peak of contraction.
Head compression (vagal response). Benign.
Reassuring. No intervention needed.
Late Deceleration
Gradual decrease, starts after contraction begins, nadir after peak.
Abrupt, variable shape and timing, often "V" or "U" shaped.
Umbilical cord compression.
Non-reassuring. Change position (especially to relieve cord pressure), may need amnioinfusion.
Anatomy, Physiology & Pharmacology Points
• Physiology: In the supine position, the heavy uterus compresses the Inferior vena cava (IVC) and Aorta, reducing preload and cardiac output by up to 30%. Left lateral positioning displaces the uterus off the great vessels.
• Pharmacology: If oxytocin (Pitocin) is infusing, the nurse must stop the infusion as part of intrauterine resuscitation, as it causes uterine hyperstimulation and worsens placental perfusion.
Memory Tips
• Late for the Party: Late decelerations are "late" – they start late (after contraction begins) and recover late (after contraction ends). They indicate the fetus is "late" in getting oxygen.
• Position First! Think: "Before you give a mask, complete the task... of rolling her to her side!" The simplest fix is often the first and most critical.
High-Frequency NCLEX Topics
This is a classic priority-setting question. The NCLEX loves to test your ability to distinguish between a correct action and the first/priority action. Always look for the quick, non-invasive, reversible intervention that addresses the most likely cause before moving to more invasive or definitive treatments.
Watch Out for Question Variations!
• The question could change the maternal position (e.g., "client is in lithotomy position for an exam") – the answer is still repositioning (often to left lateral).
• It could add "after repositioning, the late decelerations persist." Then the priority becomes a sequence: Administer oxygen → Increase IV fluids → Notify provider → Prepare for possible cesarean.
• It could ask for the rationale for left lateral positioning: "To relieve aortocaval compression and improve uteroplacental perfusion."
Nursing Clinical Practice GuideClinical Scenario: You are the labor nurse for Maria, a 40-week G1P0 patient. You note on the monitor a pattern of late decelerations dipping to 90 bpm with each contraction. Her baseline has drifted down to 105 bpm. She mentions she's been lying on her back for the last hour because she's tired. The tocodynamometer shows adequate resting tone between contractions.
Nursing Intervention Strategy:
1Immediate Action (Assessment & Intervention)Calmly say, "Maria, I'm going to help you roll onto your left side to help your baby." Reposition her immediately to left lateral. Simultaneously, you would call for another nurse or use your call bell to alert the charge nurse/provider.
2Secondary Actions (Implementation)Once she is repositioned, apply a non-rebreather face mask at 10-15 L/min to provide high-flow oxygen. Check her IV site and increase the rate of her lactated Ringer's solution (e.g., open to a "wide open" rate temporarily per protocol) to boost intravascular volume.
3Ongoing Assessment & Communication (Evaluation)Continuously monitor the FHR strip for improvement (return of baseline to normal range, resolution of late decelerations, presence of variability). Assess maternal vital signs. Clearly and concisely report the situation to the provider: "Dr. Smith, this is Nurse Jane. Patient Maria in room 5 has developed recurrent late decelerations with a baseline drop to 105. We have repositioned her left lateral, started O2 at 10L, and bolused IV fluids. The current strip shows..." Document all actions, timing, and fetal response meticulously.
Nursing Procedure & Medication Flow
• Procedure: Intrauterine Resuscitation
1. Lateral position (Left side first).
2. Oxygen at 8-10 L/min via non-rebreather mask.
3. Volume expansion (IV fluid bolus of 500-1000 mL crystalloid, e.g., Lactated Ringer's).
4. Eliminate uterine stimulants (Discontinue Pitocin/oxytocin infusion if running).
5. Consider Tocolytics (like terbutaline) per provider order if hyperstimulation is present.
• Medication Caution: If preparing for a stat cesarean, know that medications like Ranitidine or Sodium citrate (to reduce aspiration risk) or antibiotics (for surgical prophylaxis) may be ordered. Verify allergies and administer promptly.
A Word from Your Senior Nurse
"In the chaos of a non-reassuring strip, your brain might scream 'Call the doctor!' or 'Get ready for the OR!'. But take a deep breath. Your first move is almost always your hands-on nursing skill. Look at your patient. Is she on her back? Fix that. Right now. You are the one at the bedside who can make that immediate, life-saving difference for two patients—the mother and the baby. Mastering this sequence of intrauterine resuscitation isn't just for the test; it's the muscle memory you need for the delivery room. You are the fetus's first advocate and rescuer."
Late Decelerations — A gradual decrease in the fetal heart rate beginning at the peak of a contraction, with the lowest point (nadir) occurring after the peak of the contraction. It indicates uteroplacental insufficiency and fetal hypoxia.
Uteroplacental Insufficiency — A condition where the placenta is unable to deliver adequate oxygen and nutrients to the fetus to meet its demands, often manifesting as late decelerations on the fetal monitor.
Supine Hypotensive Syndrome (Aortocaval Compression) — Compression of the maternal inferior vena cava and aorta by the gravid uterus when in a supine position, leading to decreased venous return, cardiac output, and uterine blood flow.
Intrauterine Resuscitation — A series of nursing and medical interventions aimed at improving oxygen delivery to the fetus and correcting non-reassuring fetal heart rate patterns. Core steps include maternal repositioning, oxygen administration, IV fluid bolus, and discontinuing uterine stimulants.
Non-Rebreather Mask — A face mask with a reservoir bag and one-way valves used to deliver high concentrations of oxygen (up to 90-100%) by preventing the patient from rebreathing exhaled air. Used in situations requiring high-flow oxygen, such as fetal resuscitation.