Umbilical cord prolapse and the category 1 cesarean
Stem
A 33-year-old G3P2 at 39 weeks, 82 kg, is 6 cm dilated with no epidural. After artificial rupture of membranes with a high presenting part, the midwife feels a loop of cord and the fetal heart rate falls to 70 per minute. The obstetrician is pushing the presenting part up with two fingers and calls a category 1 cesarean. She ate a sandwich 3 hours ago. Her airway examination is unremarkable.
Question
What is your anesthetic plan?
Ideal answer
HeadlineCord prolapse with fetal bradycardia: delivery within 30 minutes. If the heart rate stays low despite elevation, I do a rapid sequence general anesthetic; if it recovers, a quick spinal.
- Ask what the fetal heart is doing now, because relieving compression decides how much time I have.1
- Persistent bradycardia: rapid sequence induction, after preoxygenation and antacid, with left uterine displacement while the hand stays in the vagina.
- Recovered heart rate: single-shot spinal by an experienced anesthetist, because regional is safer than general; no repeated attempts.1
- Verbal consent and the neonatal team called, because category 1 delivery cannot wait for paperwork.1
- Terbutaline 0.25 mg subcutaneously if delivery is delayed, because tocolysis reduces cord compression from contractions.1
Watch for: the fetal heart rate through every move and transfer; a renewed fall converts my plan to general anesthesia.
Breaking down the answer
- Why it is an emergency — perinatal mortality was 91 per 1000 in one large study and more than ten-fold higher when prolapse occurs outside hospital.1
- Temporary measures — manual elevation, knee–chest or head-down left lateral position, or filling the bladder with 500–750 mL; the bladder must be emptied again before birth.1 Changes if: transfer by ambulance, where knee–chest is unsafe.
- General versus regional — general anesthesia complications are rare with modern technique but still higher than regional; regional is reasonable once temporary measures have relieved compression.1
- Who is at risk — breech, transverse or unstable lie, second twin, polyhydramnios, prematurity and amniotomy with a high presenting part; incidence 0.1–0.6%, about 1% in breech.1 External cephalic version and twin gestations also list cord prolapse among their complications.2
- Full dilatation — operative vaginal birth can be attempted if it will be quick and safe;1 I may then need only a pudendal block or a top-up.
Follow-up question
With manual elevation and head-down positioning the fetal heart rate recovers to 140 per minute. The obstetrician asks you to place the spinal with her in the knee–chest position so elevation is easier. What do you do?
Follow-up answer
HeadlineA recovered heart rate buys time for a spinal, but not in knee–chest; I place it lateral with the hand still elevating.
RCOG does not recommend siting a spinal in the knee–chest position.1 I place it lateral, one experienced attempt, with left uterine displacement afterward and a phenylephrine infusion running. The fetal heart is monitored continuously; if it falls again or the block fails, I convert immediately to rapid sequence induction. With a normal heart rate, a category 2 cesarean can be considered.1 The bladder is emptied before incision.
Pitfalls that cost points
- Pushing the cord back into the vagina; manual replacement is not recommended, and loops outside should be handled minimally to avoid vasospasm.1
- Removing the elevating hand to move the patient faster; compression returns at once.
- Forgetting to empty the filled bladder before incision, risking bladder injury.
Rapid-fire
Q: Decision-to-birth target for category 1? A: Within 30 minutes.1
Q: Bladder volume to elevate the presenting part? A: 500–750 mL through a catheter, then clamp it.1
Q: Tocolytic and dose? A: Terbutaline 0.25 mg subcutaneously while preparing for cesarean if fetal heart rate abnormalities persist.1
Q: Is written consent required? A: Verbal consent is acceptable for a category 1 cesarean.1
Numbers to know
| Item | Value |
|---|---|
| Incidence | 0.1–0.6%; ~1% with breech1 |
| Perinatal mortality | 91 per 1000 in one study1 |
| Bladder filling | 500–750 mL1 |
| Terbutaline | 0.25 mg SC1 |
| Category 1 target | Birth within 30 min1 |
Links
- General anesthesia for cesarean delivery, Neuraxial anesthesia for cesarean: epidural top-up, failed block and conversion, Fetal heart rate tracings and emergent delivery, Rapid sequence induction and full stomach, Uterotonics and tocolytics
- RCOG Green-top Guideline No. 50, Umbilical Cord Prolapse (2014)
Sources
- 1.Umbilical Cord Prolapse (Green-top Guideline No. 50, 2nd edition) · RCOG, 2014 · rcog.org.ukOfficial RCOG PDF (November 2014), linked from the RCOG guideline page; replaces a third-party mirror that now returns 403.
- 2.Anesthetic approaches for malpresentation and multiple gestation · Curr Opin Anaesthesiol (PMC13124260), 2026 · pmc.ncbi.nlm.nih.gov
Facts on this page were checked against these sources on Nov 2, 2026. Guidelines change; confirm doses against current institutional protocols.