A nurse is caring for a primigravida client at 40 weeks gestation who has been in active labor for 12 hours with minimal cervical dilation progress. The fetal heart rate shows late decelerations, and the client is experiencing strong, frequent contractions. What is the priority nursing intervention?

When a laboring patient presents with a Category III fetal heart rate tracing (e.g., late decelerations) and arrest of dilation, the nurse must recognize this as an obstetric emergency. Immediate notification of the provider and preparation for emergent cesarean delivery are the priorities. Simultaneously, initiate intrauterine resuscitative measures as a bridge to delivery: administer oxygen via non-rebreather mask at 10 L/min, position the patient in left lateral position to maximize uteroplacental perfusion, discontinue oxytocin infusion, and administer a rapid intravenous fluid bolus as ordered.

Late decelerations result from uteroplacental insufficiency, where diminished blood flow and oxygen transfer during contractions lead to fetal myocardial hypoxia. Persistent late decelerations indicate fetal metabolic acidosis. When this occurs alongside labor dystocia (e.g., no cervical change for 4 hours with adequate contractions), the likelihood of a safe vaginal delivery diminishes rapidly. Continuing labor under these conditions risks worsening fetal acidemia, hypoxic-ischemic encephalopathy, or stillbirth.

• Activate the chain of command and call for immediate obstetric and anesthesia provider presence.
• Prepare the operating room and gather necessary supplies (e.g., surgical prep kit, indwelling catheter).
• Ensure informed consent is obtained per facility protocol, explaining the urgency of the situation to the patient and support person.
• Continuously monitor fetal heart rate and maternal vital signs until transfer to the operating room.
• Document all interventions, communications, and the patient's response in the medical record.

Following delivery, anticipate the need for neonatal resuscitation due to potential acidosis. Participate in a team debriefing to review the event, communication effectiveness, and system improvements. Provide emotional support to the patient and family, addressing any concerns about the emergent nature of the delivery.