A 25-year-old primigravida at 40 weeks gestation is undergoing labor induction with oxytocin. Suddenly, she develops severe dyspnea, cyanosis, and hypotension. The fetal heart rate shows severe bradycardia. The nurse suspects anaphylactoid syndrome of pregnancy (ASP). What is the priority nursing intervention?

Upon suspecting anaphylactoid syndrome of pregnancy (ASP), the nurse must immediately call for help and activate the facility's obstetric emergency response team. The highest priority is to prepare for maternal cardiopulmonary arrest. Initiate high-quality CPR if the patient loses pulses, ensuring left uterine displacement to relieve aortocaval compression. Simultaneously, the team must prepare for an emergent cesarean delivery, as perimortem delivery within 5 minutes of arrest significantly improves maternal resuscitation outcomes and fetal survival.

While CPR is ongoing, manage the airway with 100% oxygen via bag-valve-mask and prepare for rapid sequence intubation. Establish large-bore intravenous access for fluid resuscitation and administration of emergency medications. Continuous fetal monitoring is secondary to maternal stabilization; the focus is on restoring maternal cardiac output to perfuse the uterus. Transfer to an operating room or prepare the labor room for an immediate bedside cesarean section. Post-resuscitation, anticipate massive transfusion protocol for DIC and transfer to an intensive care unit.