A patient in labor experiences a sudden drop in fetal heart rate and reports a gush of fluid. The nurse suspects an umbilical cord prolapse. What is the immediate nursing action?

Choice A rationale Applying a fetal scalp electrode requires sterile technique and assessment time, which is not the immediate, life-saving intervention needed for a suspected umbilical cord prolapse. Umbilical cord prolapse causes immediate, severe fetal compromise due to compression of the cord, leading to reduced oxygen and nutrient supply. The immediate priority is relieving the cord compression to restore uteroplacental perfusion and fetal oxygenation. The electrode does not address the cause of the distress. Choice B rationale While an emergency cesarean section is typically the definitive treatment, preparing for it is not the immediate action to alleviate the acute fetal distress caused by the compressed umbilical cord. The initial nursing action must focus on repositioning the patient to use gravity to relieve pressure on the cord, thereby immediately improving fetal oxygen supply before surgical preparation can be completed. Choice C rationale Positioning the patient in a knee-chest (or Trendelenburg) position uses gravity to shift the fetal presenting part away from the prolapsed umbilical cord, thus immediately relieving the compression. This action is critical for restoring blood flow through the umbilical vessels, which in turn optimizes fetal oxygenation, making it the highest priority life-saving nursing action. Choice D rationale Administering oxygen to the mother may increase the maternal partial pressure of oxygen and potentially marginally increase fetal oxygenation, but it does not address the primary, severe problem of umbilical cord compression. It is a supportive measure often used alongside repositioning but is secondary to the immediate goal of physically alleviating the pressure on the prolapsed cord.