A nurse is assessing a primigravida client at 40 weeks gestation who has been in active labor for 12 hours. The cervix remains at 6 cm dilation with minimal change over the past 4 hours. Fetal heart rate is 140-150 bpm with moderate variability. Contractions occur every 2-3 minutes, lasting 60-70 seconds with strong intensity. What is the nurse's priority assessment at this time?

A primigravida at 40 weeks presents with a prolonged active phase. After 12 hours of active labor with strong, frequent contractions, cervical dilation has arrested at 6 cm for 4 hours. The fetal heart rate tracing is reassuring (140-150 bpm, moderate variability). The priority is to identify the mechanical cause of the arrest before considering operative interventions.

• Evaluate fetal position: Perform Leopold's maneuvers and, if indicated, a vaginal examination to determine the fetal lie, presentation, and position. An occiput posterior or transverse position is a common cause of arrest despite adequate contractions.
• Assess fetal station: Determine the level of the presenting part relative to the ischial spines. A high station despite strong contractions may indicate cephalopelvic disproportion (CPD) or a malposition.
• Rule out CPD: Assess for clinical signs of pelvic inlet or outlet contracture. If CPD is suspected, a trial of labor may be contraindicated, and cesarean birth may be necessary.

The contraction pattern is already documented as adequate (every 2-3 minutes, lasting 60-70 seconds, strong intensity). Therefore, the problem is not the "powers" but likely the "passenger" or "passage." Identifying the fetal position and station directly addresses these factors and guides the next steps, such as position changes, amniotomy, oxytocin augmentation, or operative delivery.

• Assist the client into positions that promote fetal rotation and descent (e.g., hands and knees, side-lying, upright positions).
• Continue to monitor fetal heart rate and contraction pattern for signs of fetal intolerance or tachysystole.
• Provide emotional support and pain management, as prolonged labor increases maternal fatigue and anxiety.
• Prepare for potential interventions, including amniotomy, oxytocin augmentation, or cesarean birth, based on assessment findings and provider orders.