A pregnant client at 34 weeks gestation presents to the labor and delivery unit reporting a sudden gush of clear fluid from the vagina 2 hours ago. Which assessment finding would be the nurse's priority concern?
1Maternal temperature elevated to 99.2°F (37.3°C) with no other signs of infection
2Fetal heart rate baseline of 140 beats per minute with moderate variability
3Umbilical cord prolapse with fetal heart rate dropping to 80 beats per minute✓ 정답
4Amniotic fluid sample that tests positive for ferning on microscopic exam
해설
Umbilical cord prolapse with fetal bradycardia (80 bpm) is an obstetric emergency requiring immediate intervention to prevent fetal hypoxia and death. Other findings (mild maternal fever, normal FHR, positive ferning) are less urgent.
Clinical Priority: Recognizing Obstetric Emergencies in PROM
When a client presents with a sudden gush of fluid, the clinical picture points to rupture of membranes. While confirmation of this diagnosis and monitoring for infection are important, the nurse's immediate priority is to identify life-threatening complications that require emergent intervention. The assessment finding of greatest concern is one that indicates acute fetal compromise.
Analysis of Assessment Findings
Umbilical cord prolapse is an obstetric emergency where the umbilical cord descends through the cervix alongside or ahead of the presenting fetal part after membrane rupture. The sudden gush of fluid can carry the cord downward, leading to compression of the cord between the fetal presenting part and the maternal pelvis. This compression acutely occludes umbilical blood flow, causing severe fetal hypoxia and bradycardia. A fetal heart rate dropping to 80 beats per minute is a profound, late sign of fetal distress and requires immediate action to relieve cord compression and prepare for emergency cesarean delivery. This scenario represents an immediate threat to fetal life and is the highest priority on the NCLEX-RN framework of airway, breathing, and circulation, applied here to the fetus.
The other findings, while relevant to the care of a client with premature rupture of membranes (PROM), do not represent an immediate crisis:
- A maternal temperature of 99.2°F (37.3°C) is a very mild elevation. While it requires continued monitoring as a potential early sign of chorioamnionitis, a significant infectious process is a developing concern, not an immediate emergency like a prolapsed cord .
- A fetal heart rate baseline of 140 beats per minute with moderate variability is a reassuring sign. It indicates a well-oxygenated fetal central nervous system and is a normal, expected finding.
- A positive ferning test on a microscopic exam of the vaginal fluid confirms that the membranes have ruptured. This is a diagnostic finding that confirms the suspected PROM but does not, by itself, signal an emergency.
Pathophysiology and Clinical Reasoning
The pathophysiology of PROM involves a complex interplay of factors that weaken the chorioamniotic membranes, including infectious, inflammatory, and mechanical processes . Once the membranes rupture, the protective barrier is lost, creating risks for both infection and cord prolapse. The sudden loss of fluid, as described in the scenario, mechanically increases the risk of the cord washing down into the vagina, especially if the presenting part is not well-applied to the cervix. The resulting cord compression leads directly to fetal hypoxemia, which is immediately reflected as a deep, persistent bradycardia. This is a classic presentation that the NCLEX-RN tests under "management of care" and "physiological adaptation," requiring the nurse to rapidly distinguish between an expected finding, a developing complication, and an immediate emergency. The nurse's priority is to perform a sterile vaginal examination to assess for a prolapsed cord and, if found, manually elevate the presenting part off the cord while calling for immediate assistance.
Clinical Case: Cord Prolapse in PROM
Scenario: A 30-year-old G2P1 at 34 weeks gestation presents with a sudden gush of clear fluid 2 hours ago. On initial assessment, the nurse visualizes a loop of umbilical cord protruding from the vagina. Fetal heart rate is auscultated at 80 bpm.
Immediate Nursing Actions:
Call for Help: Activate the obstetric emergency team and notify the provider immediately. This is a surgical emergency.
Relieve Cord Compression: Perform a sterile vaginal exam and gently elevate the presenting fetal part off the cord. Maintain this position continuously.
Maternal Positioning: Place the client in an extreme Trendelenburg or knee-chest position to use gravity to keep the fetus from compressing the cord.
Bladder Instillation: If delivery is not imminent, prepare to assist with instilling 500-700 mL of warmed sterile saline into the maternal bladder via a Foley catheter to elevate the presenting part.
Administer Oxygen and IV Fluids: Provide 10 L/min oxygen via non-rebreather mask and establish a large-bore IV line for a fluid bolus to improve fetal oxygenation and perfusion.
Continuous Fetal Monitoring: Apply an external fetal monitor if possible without delaying interventions, or auscultate FHR frequently to assess response to interventions.
Prepare for Emergency Cesarean: Have the surgical team prepare the operating room. If the cord is visible and pulsating, the fetus is viable, and an immediate cesarean section is required.
Critical Considerations:
Do not attempt to push the cord back in. This can cause vasospasm and worsen hypoxia.
Keep the exposed cord warm and moist. Cover it with sterile saline-soaked gauze to prevent drying and vasospasm.
Monitor for fetal demise. If the cord is no longer pulsating, assess for fetal heart sounds. If absent, confirm with ultrasound and manage supportively.
Document: Time cord prolapse was identified, interventions performed, FHR response, and communication with the provider.
Umbilical Cord Prolapse — An obstetric emergency where the umbilical cord slips into the vagina ahead of the presenting fetal part after membrane rupture, risking cord compression and fetal hypoxia.
Premature Rupture of Membranes (PROM) — Spontaneous rupture of the amniotic sac before the onset of labor, often presenting with a sudden gush of fluid.
Ferning Pattern — A microscopic arborization pattern seen when amniotic fluid dries on a slide, used as a confirmatory test for membrane rupture.
Fetal Bradycardia — A sustained fetal heart rate below 110 beats per minute, which is a late sign of severe fetal distress and hypoxia.