Educational draft · awaiting clinical reviewThe full textbook explains uncertainty but does not replace live national or local guidance, specialist advice, or current prescribing information.
Detect cord prolapse promptly, protect umbilical blood flow during emergency preparation and transfer, and select an appropriate urgent route of birth.
The umbilical cord normally remains above the presenting part, protected from direct pressure by the membranes and surrounding fluid. Prolapse becomes possible when space exists between the presenting part and the pelvis as fluid escapes. The diagnosis is often made after a sudden trace change, but a cord may be found incidentally on examination before the fetus becomes compromised. A normal rate at that moment is a window for organised urgent care, not evidence that the cord is safe.
Management aims to preserve flow during the short interval needed to achieve birth. Decompression is temporising, so a staff member should remain responsible for maintaining it while others prepare theatre, anaesthesia, transfer and newborn support. Before viability or when fetal death is confirmed, management requires a different individual discussion; the gestational boundaries printed in an older cord guideline should not substitute for current specialist perinatal counselling.
An unengaged head, malpresentation or premature fetus leaves space for the cord to descend when membranes rupture. The relevant mechanism is incomplete filling of the pelvic inlet, rather than fetal size alone.
Rapid fluid escape with polyhydramnios and procedures that lift the presenting part can facilitate prolapse. Amniotomy and obstetric manipulation therefore require awareness of lie, station and immediate birth facilities.
After birth of the first twin, changes in lie and presentation can leave the second twin vulnerable. Membrane rupture and examination must be interpreted within a skilled plan for second-twin management.
Pressure between the presenting part and the maternal pelvis compresses umbilical vessels. Contractions can intensify this obstruction, reducing oxygen delivery and explaining rapid fetal heart-rate deterioration.
Handling and exposure of the cord can provoke vasospasm in addition to mechanical pressure. Minimal manipulation complements elevation of the presenting part, because relieving pressure alone may not remove every impediment to flow.
Sustained interruption of placental circulation causes hypoxaemia followed by acidosis and possible brain injury. Fetal reserve, preceding compromise and the completeness of obstruction influence the clinical course.
A prolonged deceleration, persistent bradycardia or recurrent variable decelerations after spontaneous or artificial rupture is characteristic. The presenting part may previously have been described as high or poorly applied. Examine promptly rather than assuming a routine transient response to amniotomy.
A soft pulsatile structure may be felt below or beside the presenting part, or a loop may be visible externally. Distinguish it carefully from fetal fingers or toes. Absent palpable pulsation does not alone prove fetal death; confirm fetal cardiac activity appropriately.
Prematurity, breech or transverse lie, polyhydramnios, multiple pregnancy and an unengaged presenting part create room for descent. These associations support preventive planning but do not reliably predict every event, so teams must recognise prolapse in apparently low-risk labour too.
The cord may remain alongside the presenting part and escape an initial examination. Persistent concerning fetal changes still require senior assessment for other causes and urgent birth when indicated. Repeated attempts to find a cord should not delay a decision already justified by fetal compromise.
Excessively frequent contractions during oxytocin treatment can produce bradycardia without cord prolapse. Stop the infusion and assess urgently, while examination excludes a cord and other acute causes.
Abruption can abruptly impair placental exchange, sometimes with pain, bleeding and uterine tenderness. Visible loss may be small despite a major concealed event, and maternal resuscitation becomes central.
A blood-pressure fall after neuraxial analgesia can reduce uteroplacental perfusion. Maternal observations and timing help distinguish this treatable mechanism, although hypotension and cord compression can coexist.
Prolonged compromise may cause encephalopathy or death, making rapid recognition and coordinated relief of compression essential. Outcome assessment requires the newborn's evolving clinical condition as well as birth measurements.
Urgent caesarean or assisted vaginal delivery carries risks of bleeding, infection and trauma. Selecting the quickest safe route includes maternal assessment instead of pursuing speed without preparation.
The sudden emergency can be frightening even when mother and baby recover physically. Offer an understandable account, invite questions later and identify persistent distress requiring appropriate support.
Before amniotomy, assess lie, engagement and application to the cervix. Avoid artificial rupture with a high mobile part when possible; if essential, arrange immediate access to caesarean birth rather than relying on a slow controlled release alone.
Routine scanning does not predict prolapse reliably because cord position changes. Selected evaluation may inform particular breech plans, but a reassuring antenatal scan cannot establish that amniotomy or later membrane rupture is risk-free.
A woman who can see or feel a cord after waters break should call emergency services, adopt knee–chest while waiting if able, and avoid touching the cord. The professional team then adapts positioning safely for transport.
Successful elevation may restore fetal flow while the hand remains in place. Releasing pressure to see whether the improvement persists can cause avoidable recurrent compression; definitive birth planning should proceed from the diagnosed prolapse.
Trying to push a prolapsed cord back into the uterus to resume labour is not a recommended treatment.
Waiting to obtain a perfect CTG trace before relieving obvious cord compression loses valuable time.
Leaving the bladder distended during birth can obstruct delivery and complicate surgery; explicitly hand over the need to drain it.
Automatically choosing caesarean despite an immediately achievable safe vaginal birth can prolong the interval to delivery.
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At 38 weeks, a woman with a high fetal head develops bradycardia immediately after amniotomy. Vaginal examination reveals a pulsating cord below the head and a cervix dilated to five centimetres. What is the most appropriate immediate manoeuvre while help prepares birth?
National guidance is shown before implementation-dependent detail. Typical adult dose examples remain subject to patient factors, contraindications and the live BNF or specialist protocol. Source check completed 7 Sept 2026; clinical approval remains outstanding.
Editorial contact: Doctor’s Passport editorial team. Source-check date is separate from clinical approval. Report a content problem · Content changes
Use only with appropriate obstetric supervision and maternal monitoring. Consider tachyarrhythmia, cardiac disease, hyperglycaemia and hypokalaemia risk; it must not replace decompression or delay definitive birth.