A nurse is monitoring a laboring client and observes the following fetal heart rate (FHR) pattern: baseline FHR of 140 bpm, moderate variability, and recurrent late decelerations with each contraction. What is the most appropriate initial nursing action?
1Increase the oxytocin infusion rate to strengthen contractions
2Encourage the client to push with the next contraction
3Document the findings and continue monitoring
4Change the client's position to left lateral and administer oxygen✓ 정답
해설
Late decelerations indicate uteroplacental insufficiency and fetal hypoxia. Immediate interventions include left lateral positioning and oxygen administration to improve fetal oxygenation. Other options are inappropriate as they may worsen the situation.
Core Nursing ExplanationKey Concept Analysis: This question assesses the recognition and immediate management of a non-reassuring fetal heart rate (FHR) pattern. The key finding is recurrent late decelerations. Late decelerations are characterized by a gradual decrease in FHR that begins after the peak of a uterine contraction and returns to baseline after the contraction ends. Their pathophysiology is uteroplacental insufficiency (UPI). During a contraction, blood flow to the intervillous space of the placenta is temporarily reduced. In a compromised placenta (due to conditions like hypertension, diabetes, or postmaturity), this reduction causes fetal hypoxia, which triggers a vagal response, slowing the heart rate. Recurrent late decelerations are a sign of Key Point! ongoing fetal oxygen deprivation and require immediate intervention to improve uteroplacental perfusion and fetal oxygenation.
Answer Rationale: The most appropriate initial nursing action is Change the client's position to left lateral and administer oxygen. Here's the physiological and clinical evidence:
1. Left Lateral Position: This position displaces the gravid uterus off the maternal inferior vena cava and aorta, improving venous return and cardiac output. This maximizes blood flow to the placenta, directly addressing uteroplacental insufficiency.
2. Oxygen Administration: Providing supplemental oxygen (usually 8-10 L/min via non-rebreather mask) increases the oxygen content in the maternal blood, thereby increasing the oxygen available for diffusion across the placenta to the fetus.
These are first-line, non-invasive interventions per the AWHONN (Association of Women's Health, Obstetric and Neonatal Nurses) guidelines. They are performed while notifying the provider and preparing for possible further actions (e.g., discontinuing oxytocin, preparing for operative delivery).
Distractor Analysis:
Watch out for confusion!Option ①: Increase the oxytocin infusion rate - This is absolutely contraindicated. Oxytocin (Pitocin) increases the frequency and intensity of contractions, which would worsen uteroplacental insufficiency by further compromising blood flow during contractions, potentially leading to severe fetal acidosis or demise.
Watch out for confusion!Option ②: Encourage the client to push - Pushing (bearing down) increases intra-abdominal pressure, which can further reduce placental perfusion. Pushing is appropriate during the second stage of labor with a reassuring FHR pattern, but not when late decelerations are present.
Watch out for confusion!Option ③: Document and continue monitoring - While documentation is essential, "continue monitoring" without intervention is passive and dangerous when a pattern indicates acute fetal compromise. Nursing requires active intervention in this scenario.
Related Concepts: The management of FHR patterns follows a logical sequence: Position change & O2 → Discontinue uterotonic agents (e.g., oxytocin) → IV fluid bolus → Notify provider → Consider tocolytics → Prepare for expedited/operative delivery. The presence of moderate variability in this scenario is a reassuring sign that the fetal central nervous system is not yet acidotic, giving time for corrective measures to work.
Concept Summary
Concept
Description
Clinical Implication
Late Deceleration
Gradual FHR decrease starting after contraction peak, mirroring contraction shape. Caused by UPI.
Sign of fetal hypoxia. Requires immediate intervention to improve placental perfusion.
Uteroplacental Insufficiency (UPI)
Inability of placenta to deliver adequate oxygen/nutrients to fetus.
Underlying cause of late decels. Associated with maternal hypertension, diabetes, postmaturity.
First-Line Interventions for Late Decels
Left lateral position, O2 administration, discontinue oxytocin, IV fluid bolus.
Nurse-initiated actions to maximize fetal oxygenation while notifying provider.
FHR Variability
Beat-to-beat fluctuations in baseline FHR. Reflects intact fetal CNS.
Moderate variability (as in scenario) is reassuring. Absent/minimal variability with late decels is an ominous sign.
Side-by-Side Comparison!
Deceleration Type
Shape & Timing
Pathophysiology (Cause)
Nursing Actions
Early Deceleration
Mirrors contraction. Onset & nadir correspond with start & peak of contraction.
Head compression (vagal response). Benign, normal finding.
No intervention needed. Reassure mother.
Late Deceleration
Onset after contraction starts, nadir after peak, recovery after contraction ends.
Uteroplacental insufficiency (fetal hypoxia).
LEFT LATERAL, O2, stop oxytocin, notify provider.
Variable Deceleration
Variable shape, abrupt onset & recovery. Often V/U-shaped. Timing variable.
Umbilical cord compression.
Change position (try knee-chest), O2, stop oxytocin, consider amnioinfusion.
Anatomy, Physiology & Pharmacology Points
Physiology: Uterine contractions compress spiral arteries, reducing placental blood flow. A healthy placenta has reserve; a compromised one does not, leading to fetal hypoxia (late decels).
Anatomy: The left lateral position relieves pressure on the maternal great vessels (aorta and inferior vena cava), preventing supine hypotensive syndrome.
Pharmacology: Oxytocin is a uterotonic. In the presence of non-reassuring patterns, it must be discontinued, not increased. Terbutaline is a tocolytic that may be used to relax the uterus in emergencies.
Memory Tips
LATE for PLACENTA: Late decelerations = Placental problem.
VEAL CHOP Mnemonic for FHR Patterns:
V - Variable decels → C - Cord Compression
E - Early decels → H - Head Compression
A - Accelerations → O - Okay (reassuring)
L - Late decels → P - Placental Insufficiency
First Actions are "LO": For Late decels, think Lateral position and Oxygen.
High-Frequency NCLEX Topics
Fetal monitoring is a Core NCLEX topic. You must know how to identify early, variable, and late decelerations from a strip and select the priority nursing action. NCLEX loves to test the difference between benign patterns (early decels, accelerations) and those requiring intervention (late decels, severe variables, prolonged decels).
Watch Out for Question Variations!
Symptom to Intervention: "The nurse notes recurrent late decelerations. Which action should the nurse take first?" (Answer: Reposition to left side).
Intervention to Rationale: "A nurse places a laboring client in the left lateral position. The client asks why. Which response is correct?" (Answer: "To increase blood flow to your baby.").
Outcome Evaluation: "After repositioning a client with late decels and administering O2, the FHR pattern improves. What does this indicate?" (Answer: The intervention was effective; the cause was likely transient uteroplacental insufficiency).
Nursing Clinical Practice GuideClinical Scenario: You are the nurse for Maria, a 32-year-old G2P1 at 39 weeks gestation being induced for gestational hypertension. She is receiving oxytocin via IV pump. On continuous electronic fetal monitoring (EFM), you notice the FHR baseline is 142 with moderate variability, but with each contraction, a smooth, gradual dip in the FHR begins about 20 seconds after the contraction starts and doesn't return to baseline until well after the contraction ends. The pattern is recurrent.
Nursing Intervention Strategy:
1. Immediate Action (Within seconds): Say "Maria, I need you to roll onto your left side for me, please." Assist her into left lateral position. Simultaneously, apply a non-rebreather mask at 10 L/min. Stop the oxytocin infusion by turning off the pump (per protocol or after notifying provider).
2. Assessment & Communication: Check maternal blood pressure and heart rate. Increase the IV fluid rate (e.g., Lactated Ringer's) with a 500-1000 mL bolus as ordered to support maternal circulation. Notify the provider immediately with a clear report: "Patient experiencing recurrent late decelerations. We have repositioned, administered O2, and stopped the oxytocin. FHR baseline 140s with moderate variability. Awaiting further orders."
3. Ongoing Monitoring & Preparation: Continuously monitor the FHR and uterine activity. Assess for improvement in the pattern. Prepare for possible next steps: administration of tocolytics (e.g., terbutaline), internal monitoring (FSE, IUPC), or preparation for an emergency cesarean section if the pattern does not correct.
Patient Safety and Precautions:
Never increase oxytocin in the face of non-reassuring FHR patterns. This is a critical safety error.
Ensure oxygen is delivered effectively—mask seal is tight, tubing is not kinked.
Monitor maternal oxygen saturation if available. Be aware that high-flow oxygen for prolonged periods is not typical; interventions are meant to be corrective and temporary.
Document thoroughly: time the pattern was noted, specific actions taken (position change, O2 L/min, oxytocin discontinued), notification of provider, and the fetal response to interventions.
Nursing Procedure & Medication FlowProcedure: Responding to Late Decelerations
1. Identify the pattern (recurrent late decels with/without other features).
2. Position Change: Assist to left lateral (or right lateral) position.
3. Oxygen Administration: Apply non-rebreather mask at 8-10 L/min.
4. Discontinue Uterotonic: Stop oxytocin/Pitocin infusion.
5. Increase IV Fluids: Open IV line or administer bolus per protocol/order.
6. Notify Provider and relay actions taken.
7. Consider Internal Monitoring if not already in place for more accurate assessment.
8. Evaluate Response: Monitor for resolution of decelerations.
9. Prepare for Delivery: If pattern does not improve, prepare for operative delivery.
Medication Alert: Oxytocin (Pitocin)
Action: Stimulates uterine contractions.
Nursing Responsibility: Always use an infusion pump. Monitor uterine activity and FHR continuously. Titrate per protocol based on contraction pattern and FHR.
Critical Action: Key Point!STOP the infusion immediately for: Contractions >90 seconds, resting tone >25 mmHg, FHR decelerations (late or severe variable), or tachysystole (>5 contractions in 10 minutes).
A Word from Your Senior Nurse
In labor and delivery, you are the guardian for two patients—the mother and the baby. The fetal monitor is your window into the baby's well-being. When you see late decelerations, don't panic, but act swiftly and deliberately. Your first moves—turning the mom and giving oxygen—are powerful. They buy time and often resolve the issue. Remember, the NCLEX wants you to be a safe, thinking nurse. It's not about memorizing that "4 is the answer," but understanding why turning left and giving O2 is the priority over pushing or waiting. That clinical reasoning is what will make you an excellent nurse at the bedside.
Late Deceleration — A gradual decrease in FHR beginning after the contraction peaks, caused by uteroplacental insufficiency and fetal hypoxia.
Uteroplacental Insufficiency — A condition where the placenta cannot deliver adequate oxygen and nutrients to the fetus, often causing late decelerations.
Left Lateral Position — A positioning intervention to displace the uterus off maternal great vessels, improving venous return and placental perfusion.
Oxytocin — A uterotonic medication used to induce or augment labor. Must be discontinued in the presence of non-reassuring FHR patterns.
FHR Variability — Beat-to-beat fluctuations in the baseline FHR, reflecting fetal central nervous system integrity. Moderate variability is reassuring.