When recurrent, deep variable decelerations with a slow return to baseline are observed, the nurse must act systematically to rule out the most dangerous cause: umbilical cord prolapse. This condition can lead to rapid fetal asphyxia and requires immediate recognition.
Immediate Vaginal Examination: The priority action is to perform a sterile vaginal examination to palpate for a pulsating cord. If a prolapsed cord is felt, the examiner's hand remains in place to elevate the presenting part off the cord while calling for emergency assistance.
Positioning Maneuvers: If cord prolapse is ruled out, reposition the client to the left lateral, knee-chest, or Trendelenburg position to relieve cord compression. Administer oxygen by non-rebreather mask at 10 L/min and increase the IV fluid rate as ordered.
Continuous Monitoring and Notification: Notify the provider immediately of the findings. If the pattern persists or worsens, prepare for expedited delivery. Continuous electronic fetal monitoring is essential to assess for progression to Category III tracing.
Documentation: Record the FHR pattern description, interventions performed, maternal vital signs, cervical dilation, station, and response to interventions in the medical record.