🚨 Cord Prolapse — Overview
Umbilical cord prolapse occurs when the umbilical cord descends through the cervix alongside or ahead of the presenting foetal part after membrane rupture. The presenting part compresses the cord against the maternal pelvis, causing acute foetal hypoxia.
CORD PROLAPSE = OBSTETRIC EMERGENCY. Every minute of cord compression increases foetal hypoxia and perinatal mortality risk. Decision-to-delivery interval should be <30 minutes (Category 1 caesarean section).
Types of Cord Presentation
Cord Prolapse (Overt)
- Membranes ruptured
- Cord descends BELOW presenting part
- Cord may be visible at introitus or palpable on vaginal examination
- Immediate emergency — foetal compromise occurs rapidly
Cord Presentation (Occult)
- Membranes INTACT
- Cord felt through forewaters on VE
- Less urgent but requires monitoring and often elective CS
- If membranes rupture → becomes frank prolapse
Incidence
- ~0.1–0.6% of deliveries
- Perinatal mortality: ~90/1000 if outside hospital; ~30/1000 in hospital with rapid response
Diagnosis
- Sudden severe foetal bradycardia or prolonged deceleration on CTG — ESPECIALLY following membrane rupture or vaginal examination
- Cord visible at vaginal introitus
- Cord palpable on digital vaginal examination
- Any sudden CTG deterioration after membrane rupture = exclude cord prolapse with immediate VE
🏃 Emergency Management of Cord Prolapse
THE PRIORITY: Relieve cord compression while preparing for immediate delivery.
Immediate Actions (Simultaneous)
- CALL FOR HELP: Emergency call — senior obstetrician, anaesthetist, midwives, theatre team, neonatal team. State: "CORD PROLAPSE — Category 1 caesarean section needed."
- RELIEVE CORD COMPRESSION: Insert fingers into vagina and MANUALLY ELEVATE the presenting part off the cord. Maintain upward pressure throughout — DO NOT remove hand until delivery.
- POSITION THE MOTHER:
- Knee-chest (all-fours) position: Mother kneels on all fours, chest lowered to bed — gravity lifts presenting part away from cord. PREFERRED if cord not yet prolapsed through introitus
- Trendelenburg position (steep head-down): Alternative — gravity shifts presenting part cephalad
- Left lateral (Sims') position: Acceptable alternative
- HANDLE CORD GENTLY: Wrap exposed cord in warm wet gauze — prevents vasospasm from cold/drying. Do NOT attempt to replace cord into uterus (futile and harmful).
- OXYGEN: High-flow O₂ to mother — improves foetal oxygenation while preparing for delivery.
- IV ACCESS + BLOODS: FBC, group and save, coagulation — in preparation for caesarean.
- BLADDER FILLING: Rapidly fill urinary bladder with 500–750 mL saline via urinary catheter — acts to lift presenting part mechanically and reduce cord compression. Useful as temporary measure during transfer to theatre.
- URGENT DELIVERY: Category 1 caesarean section if not fully dilated. If fully dilated: assisted vaginal delivery (ventouse/forceps) may be faster — obstetrician decision.
Bladder filling technique: Insert urinary catheter → fill bladder with 500–750 mL sterile saline via giving set rapidly → clamp catheter → this hydrostatically elevates the presenting part off the cord. Empty bladder immediately before incision in theatre.
Tocolysis
- Consider IV or sublingual terbutaline (tocolytic) to reduce uterine contractions temporarily — reduces intermittent cord compression during contractions while awaiting delivery
- Terbutaline 0.25 mg SC/IV — useful temporising measure
Key Principles
The one action that saves babies: Manual elevation of the presenting part immediately upon diagnosis, maintained continuously until delivery. This single intervention prevents most foetal mortality from cord prolapse.
📊 Risk Factors for Cord Prolapse
Foetal Risk Factors
- Malpresentation (breech, shoulder, transverse lie) — highest risk
- Prematurity (<37 weeks) — poorly fitting presenting part
- Multiple pregnancy (second twin particularly)
- Small for gestational age
- Long umbilical cord
Maternal/Obstetric Risk Factors
- Polyhydramnios — cord washed down on membrane rupture
- Multiparity (poorly engaged presenting part)
- Artificial rupture of membranes (ARM) — greatest iatrogenic risk
- External cephalic version (ECV)
- Internal podalic version
- Amnioinfusion
ARM (Artificial Rupture of Membranes) — highest iatrogenic risk: Before performing ARM, always ensure the presenting part is well-engaged (2/5 or less palpable abdominally). ARM with a poorly-engaged presenting part (3/5 or more) dramatically increases cord prolapse risk. Palpate cord position beforehand.
Prevention
- CTG monitoring after membrane rupture (spontaneous or artificial)
- VE immediately after membrane rupture to exclude cord prolapse
- ARM only when presenting part well-engaged
- Elective caesarean for known malpresentations (breech, transverse lie) with polyhydramnios