A 28-year-old gravida 3, para 2 client at 38 weeks gestation is admitted to the labor and delivery unit with strong, frequent contractions. She has a history of two previous cesarean deliveries. During active labor, the client suddenly screams in severe pain, and the fetal heart rate drops to 80 bpm with late decelerations. The client's vital signs show: BP 90/50 mmHg, HR 120 bpm, and she appears pale and diaphoretic. What is the nurse's immediate priority action?

In suspected uterine rupture, the immediate priority is to stop oxytocin infusion and prepare for emergency cesarean delivery to prevent maternal hemorrhage and fetal hypoxia. Other options like oxygen administration or repositioning are supportive but secondary to urgent surgical intervention.

Clinical Presentation Analysis
This client presents with a classic triad of uterine rupture: sudden, severe abdominal pain during active labor, a precipitous drop in fetal heart rate (80 bpm with late decelerations), and maternal hemodynamic instability (BP 90/50 mmHg, HR 120 bpm, pallor, diaphoresis). The history of two prior cesarean deliveries is the most significant risk factor, as a scarred uterus is present in the vast majority of rupture cases ^[2].

Pathophysiology and Risk Factors
A complete uterine rupture involves a full-thickness disruption of the myometrium and serosa, confirmed intraoperatively ^[2]. The risk is directly related to the type of uterine scar; a classical (vertical) cesarean incision carries the highest risk, though a low transverse scar, common in prior deliveries, also elevates risk during a trial of labor . The strong, frequent contractions described suggest possible tachysystole from oxytocin administration, which increases intrauterine pressure and wall tension, predisposing the scarred segment to dehiscence. When rupture occurs, the uterine contents can be extruded into the peritoneal cavity, causing catastrophic hemorrhage, placental abruption, and acute fetal hypoxia, reflected in the profound bradycardia .

Prioritization of Interventions
The immediate priority is to stop any agent that is increasing uterine wall stress. If oxytocin is infusing, discontinuing it removes the stimulus for further contractions, which could extend the rupture and worsen hemorrhage . Simultaneously, preparation for emergency cesarean delivery must begin, as definitive surgical repair and fetal rescue are the only life-saving measures. Maternal stabilization and fetal resuscitation are concurrent, not primary, actions in this scenario because the underlying cause is mechanical disruption that requires surgical correction.

Analysis of Incorrect Options
- Option 1 (Administer oxygen): Oxygen supplementation is a supportive measure for fetal resuscitation but does not address the catastrophic loss of uterine integrity and placental perfusion. It is secondary to stopping the oxytocin and preparing for surgery.
- Option 2 (Increase IV fluids and notify physician): Fluid resuscitation is critical for managing hemorrhagic shock, and physician notification is essential. However, this option fails to include the most immediate nursing action: discontinuing the uterotonic agent. Stopping oxytocin takes seconds and directly impacts the pathophysiology.
- Option 4 (Reposition to left lateral): Lateral positioning relieves aortocaval compression and may transiently improve maternal cardiac output and fetal oxygenation, but it is ineffective in the face of active uterine rupture and exsanguination. Continuous monitoring without immediate intervention delays definitive care.

Clinical Decision-Making Framework
The nurse's immediate priority action follows the "find and fix the cause" principle. The client's history and sudden deterioration point to uterine rupture as the precipitating event. The most direct and rapid intervention the nurse can perform to halt the progression of this emergency is cessation of oxytocin, which directly reduces the force driving the rupture. This action is the critical first step in the coordinated rapid response that includes fluid resuscitation, preparation for emergency surgery, and neonatal resuscitation team activation . The incidence of complete uterine rupture is low (0.044% in one cohort), but when it occurs in a scarred uterus, the time from recognition to surgical intervention is the primary determinant of maternal and neonatal outcomes ^[2].