A nurse is caring for a laboring client when the membranes rupture and a prolapsed umbilical cord is identified. The fetal heart rate drops from 140 bpm to 80 bpm. What is the nurse's immediate priority action?

The immediate priority is to relieve cord compression by positioning the client in knee-chest or Trendelenburg position and applying moist sterile gauze to the cord. This directly addresses fetal bradycardia and hypoxia, while other actions are supportive or contraindicated.

Understanding Umbilical Cord Prolapse
Umbilical cord prolapse (UCP) is an unpredictable and life-threatening obstetric emergency where the umbilical cord descends through the cervix alongside or ahead of the presenting fetal part after membrane rupture ^[3]. This creates a mechanical crisis: the cord becomes compressed between the fetal presenting part and the maternal pelvis, leading to a sudden obstruction of oxygenated blood flow to the fetus . The incidence is approximately 1 to 6 per 1000 pregnancies, and it carries a high perinatal mortality rate, ranging from 6% to 10% in high-income countries to 23% to 27% in low-income settings ^[3]. The dramatic drop in fetal heart rate from 140 bpm to 80 bpm is a direct cardiotocographic manifestation of this hypoxic insult, indicating severe fetal distress secondary to cord compression .

Why Option 2 is the Immediate Priority
The nurse's immediate priority is to relieve pressure on the prolapsed cord to restore fetal oxygenation while preparing for definitive delivery. The correct sequence involves two simultaneous, non-invasive actions: positioning and cord care.

First, positioning the client in a knee-chest position or Trendelenburg position uses gravity to shift the fetal presenting part away from the pelvis, thereby mechanically relieving compression on the umbilical cord. This is the fastest, most effective nursing intervention to restore blood flow.

Second, applying moist sterile gauze to the exposed cord serves a dual purpose. The moisture prevents the cord from drying out and undergoing vasospasm, which would further compromise blood flow. The sterile, loose application protects the cord from environmental contamination and minimizes handling, which can itself trigger vasospasm. It is critical to never attempt to push the cord back into the vagina, as this causes further compression and vascular damage.

Analysis of Incorrect Options

Option 1: Calling the healthcare provider and preparing for an emergency cesarean section is a critical step, but it is not the immediate nursing action. The fetus is in acute distress with a heart rate of 80 bpm. A delay of even a few minutes to make a phone call without first relieving cord compression allows ongoing hypoxia and increases the risk of perinatal mortality. The nurse must first intervene to resolve the compression, then delegate the call for help. UCP often necessitates an emergency cesarean delivery, but the nurse's hands-on intervention is the first link in the chain of survival .

Option 3: Administering oxygen at 10 L/min via face mask and starting IV fluids are important supportive measures to increase maternal oxygenation and circulating volume, which may indirectly benefit the fetus. However, these interventions do not address the primary problem: mechanical cord compression. Oxygen cannot reach the fetus if the umbilical vessels are occluded. These are secondary actions that can be performed by another team member after the primary maneuver to relieve pressure is initiated.

Option 4: Pushing the cord back into the vagina is a contraindicated and dangerous action. This maneuver does not reliably relieve compression; instead, it often worsens it by creating a tighter space and directly traumatizing the delicate Wharton's jelly and umbilical vessels. This can precipitate severe vasospasm, complete cessation of blood flow, and fetal demise. The cord must be kept visible and protected externally while the pressure from the presenting part is removed through maternal positioning. The classification of cord prolapse is based on the positional relationship of the cord to the presenting part, and manual replacement does not correct the underlying malposition ^[3].