Umbilical cord prolapse: revisiting its definition and management

Area of Science:

• Obstetrics and Gynecology
• Perinatal Medicine
• Emergency Medicine

Background:

• Umbilical cord prolapse is an unpredictable obstetrical emergency with significant perinatal mortality.
• Current definitions of cord prolapse and related conditions are inconsistent in medical literature.
• Occult cord prolapse is a misnomer; a proposed classification system clarifies positional relationships and associated fetal risks.

Purpose of the Study:

• To propose a standardized classification for umbilical cord prolapse, cord presentation, and compound cord presentation.
• To analyze the urgency of delivery based on fetal heart rate patterns and cord arterial pH decline.
• To review and recommend maneuvers for relieving cord compression during preparation for urgent delivery.

Main Methods:

• Literature review and analysis of existing definitions and classifications.
• Examination of data correlating fetal heart rate patterns, delivery intervals, and cord arterial pH.
• Evaluation of the efficacy of different maneuvers for relieving cord compression.

Main Results:

• A proposed classification system ranks fetal risk from highest to lowest: cord prolapse, cord presentation, and compound cord presentation.
• Cord arterial pH significantly declines with bradycardia-to-delivery interval, indicating irreversible pathology.
• The knee-chest position demonstrated the greatest cord compression relief, followed by bladder filling and Trendelenburg position.

Conclusions:

• A clear classification system for cord presentation is essential for accurate risk assessment.
• Urgent cesarean delivery is indicated for umbilical cord prolapse, with urgency dictated by fetal heart rate.
• Specific maneuvers, applied judiciously, can mitigate fetal risk during the management of umbilical cord prolapse.