Why this topic matters: Uterine rupture is a tear through the uterine muscle, usually during late pregnancy or labour. It can cause catastrophic maternal haemorrhage, fetal hypoxia, fetal expulsion into the abdomen, shock and death. A previous caesarean or uterine surgery increases risk, but rupture can occur in an unscarred uterus with obstructed labour, trauma or excessive uterotonic stimulation. Abnormal fetal heart rate is often the earliest sign. Treat suspected rupture as a category-1 obstetric emergency—call the team, resuscitate and expedite laparotomy without waiting for imaging.
Learning objectives
- Define complete and incomplete rupture and explain how scar, obstruction and uterotonic stress weaken the uterus.
- Identify risk factors and early maternal/fetal warning signs during labour and after birth.
- Perform immediate maternal ABCDE, fetal assessment, haemorrhage response and safe transfer.
- Describe definitive surgical, anaesthetic, neonatal, transfusion and post-operative care.
- Plan prevention through VBAC counselling, labour monitoring, safe induction and emergency preparedness.
Definition and types
Complete uterine rupture is a full-thickness separation of the myometrium and serosa, allowing the fetus, placenta or both to enter the peritoneal cavity. Incomplete rupture/dehiscence involves separation of the muscle with an intact serosa and may be less dramatic, but it still requires specialist assessment. Rupture may occur at a previous lower-segment caesarean scar, classical scar, myomectomy site, cornual area or an unscarred uterus.
Major maternal danger comes from rapid intra-abdominal bleeding, uterine vessel injury, bladder/ureter damage and shock. Major fetal danger comes from abrupt loss of uteroplacental perfusion, cord compression, hypoxia, prematurity and trauma.
Risk factors
| Risk group | Examples | Clinical implication |
|---|---|---|
| Previous uterine scar | Previous caesarean, especially classical/upper-segment incision; prior rupture; myomectomy entering the cavity; uterine reconstruction. | Review operative records and plan birth in a facility with immediate emergency surgery and blood. |
| Induction/augmentation | Oxytocin or prostaglandins, especially high dose, prolonged labour or poor monitoring. | Use a written protocol, careful titration and continuous maternal/fetal monitoring. |
| Obstructed/overdistended uterus | Cephalopelvic disproportion, malpresentation, macrosomia, multiple pregnancy, hydrocephalus or grand multiparity. | Recognise prolonged labour, bandl’s ring, arrest and rising maternal/fetal distress early. |
| Trauma/procedures | Abdominal trauma, difficult instrumental delivery, manual procedures or external manipulation. | Assess for bleeding, pain and fetal compromise after trauma. |
| Unscarred uterus | Rare spontaneous rupture, placenta percreta, congenital anomaly or severe obstructed labour. | Do not exclude rupture because there is no scar history. |
Clinical warning signs
- Fetal: sudden prolonged bradycardia, recurrent late decelerations, loss of variability or persistent abnormal CTG—the most common early warning.
- Maternal pain: sudden severe abdominal pain, pain between contractions, shoulder-tip pain or new tenderness; epidural analgesia can blunt pain.
- Labour change: cessation of contractions, change in abdominal contour, loss of fetal station, presenting part rising or inability to hear fetal heart where previously clear.
- Bleeding/shock: vaginal bleeding may be small despite major internal haemorrhage; tachycardia, pallor, sweating, dizziness, hypotension, oliguria and collapse are late signs.
- Urinary signs: haematuria or blood at catheter insertion may suggest bladder injury.
Suspect rupture immediately when a woman in labour with a uterine scar develops an abnormal fetal heart rate, sudden pain, haemorrhage, maternal shock, loss of station or cessation of contractions. Do not wait for all signs to appear.
First contact and emergency activation
- Shout for obstetric, anaesthetic, theatre, neonatal and blood-bank help. State: “suspected uterine rupture with maternal/fetal compromise.”
- Stop oxytocin, prostaglandin or other uterotonic infusion immediately; do not continue augmentation while assessing.
- Position supine with left uterine displacement or left lateral tilt, maintain airway and give high-concentration oxygen for maternal hypoxaemia or severe distress.
- Apply continuous fetal and maternal monitoring if this does not delay theatre; prepare for immediate transfer to the operating room.
- Do not perform forceful vaginal examination, instrumental delivery or repeated attempts to push the fetus down.
Maternal ABCDE resuscitation
A — Airway
- Assess consciousness, vomiting and aspiration risk; call anaesthesia early because rapid deterioration and general anaesthesia may be required.
- Suction and protect the airway as trained; maintain left uterine displacement during resuscitation.
B — Breathing
- Measure respiratory rate, SpO₂ and work of breathing. Give high-flow oxygen for hypoxaemia, shock or fetal compromise according to local protocol.
- Prepare assisted ventilation if exhaustion, reduced consciousness or massive haemorrhage causes respiratory failure.
C — Circulation and haemorrhage
- Insert two large-bore IV cannulas if possible. Take full blood count, group/crossmatch, coagulation, fibrinogen, electrolytes, renal function and blood gas/lactate.
- Start warmed isotonic crystalloid only as a bridge; activate the major obstetric haemorrhage/massive transfusion protocol early.
- Monitor pulse, BP, capillary refill, mental state, urine output and response. Insert a urinary catheter when safe and record hourly output.
- Use blood products and calcium/viscoelastic guidance according to the facility protocol; involve anaesthesia/critical care for vasopressor support if shock persists.
D — Disability
- Record AVPU/GCS and bedside glucose; confusion/collapse indicates severe shock, hypoxia or medication effect.
- Provide reassurance and explain actions briefly; do not leave the woman alone.
E — Exposure
- Assess abdominal contour, tenderness, vaginal bleeding, fetal station, urine and surgical scars while preserving warmth and dignity.
- Do not delay theatre for a complete examination or imaging when clinical suspicion is high.
Fetal assessment and neonatal preparation
- Use continuous fetal heart monitoring when feasible; a sudden persistent bradycardia or pathological CTG is an indication for immediate obstetric action.
- Document the last reassuring fetal heart rate, time of deterioration, contractions, medication doses and decision-to-delivery times.
- Call the neonatal resuscitation team; prepare warmer, airway equipment, ventilation, umbilical access supplies and blood/glucose monitoring.
- Do not delay maternal life-saving surgery for a prolonged fetal assessment. Delivery is usually by emergency laparotomy/caesarean unless the fetus has already delivered and the surgical team directs otherwise.
Investigations—but never at the cost of delay
- Bedside haemoglobin may underestimate acute blood loss; trend laboratory haemoglobin, lactate, coagulation and fibrinogen while resuscitating.
- Ultrasound may show free fluid or absent fetal location but is not required to confirm rupture in a crashing patient.
- Crossmatch sufficient blood and prepare platelets/plasma according to the haemorrhage protocol.
- Review previous operative notes, gestational age, placenta location, induction agents, oxytocin dose and fetal/maternal monitoring.
Definitive emergency management
- Proceed to immediate laparotomy and delivery under the obstetric/anaesthetic team. NICE classifies suspected uterine rupture as a category-1 indication because it threatens the woman or fetus.
- At surgery, control haemorrhage, deliver the fetus, assess the tear, repair the uterus when safe and fertility-preserving, or perform hysterectomy when bleeding, tissue damage or future risk makes repair unsafe.
- Inspect bladder, ureters, bowel and broad ligament; involve urology/general surgery when injured.
- Administer broad-spectrum antibiotics according to the caesarean/obstetric infection protocol and continue haemorrhage management.
- After surgery, transfer to high-dependency/ICU if shock, coagulopathy, organ injury, massive transfusion or ventilation is required.
Postoperative and postpartum care
- Monitor airway, breathing, circulation, uterine/vaginal bleeding, wound, drains, urine output, temperature, pain, haemoglobin, coagulation and electrolytes.
- Assess for renal injury, DIC, sepsis, ileus, bladder injury, wound infection and thromboembolism.
- Provide lactation and newborn support, analgesia, antibiotics and thromboprophylaxis as prescribed.
- Explain operative findings, repair/hysterectomy, transfusion and future pregnancy implications sensitively and with an interpreter when needed.
- Offer psychological first-line support; uterine rupture, emergency surgery, neonatal compromise or hysterectomy can be traumatic.
Nursing and EMT responsibilities
- Record times precisely: recognition, stopping oxytocin, call for help, IV access, blood samples, blood products, theatre arrival and delivery.
- Use two-person checks for blood, uterotonics, anaesthetic drugs and emergency infusions; monitor transfusion reactions.
- Maintain left uterine displacement during initial resuscitation, keep the woman warm and provide clear updates to her chosen support person.
- Prepare theatre and neonatal equipment, confirm allergies/consent where possible and transfer with full monitoring and resuscitation equipment.
- Use SBAR handover including scar history, gestation, fetal tracing, maternal vitals, estimated blood loss, fluids/blood and drugs given.
Prevention and risk reduction
- Review previous uterine surgery and operative records during antenatal care; counsel about planned repeat caesarean versus VBAC in an appropriate facility.
- Offer continuous fetal and maternal monitoring for planned VBAC and ensure immediate caesarean, anaesthesia, blood and neonatal capability.
- Use induction/augmentation only with clear indication, safe doses, careful cervical/contractile assessment and continuous monitoring where required.
- Recognise prolonged/obstructed labour, malpresentation, macrosomia and rising maternal/fetal distress early; do not delay referral from a lower-level facility.
- Educate the woman and family to report persistent scar pain, bleeding, faintness, reduced fetal movement or sudden change in labour immediately.
Clinical scenarios
Scenario 1 — VBAC bradycardia: A woman attempting VBAC develops sudden fetal bradycardia, abdominal pain and cessation of contractions. Stop oxytocin, call obstetric/theatre/neonatal teams, left lateral tilt, oxygen if indicated, two IV lines, blood sampling/crossmatch and immediate category-1 laparotomy. Do not wait for ultrasound.
Scenario 2 — Silent rupture with epidural: A woman with an epidural has recurrent pathological CTG, maternal tachycardia and loss of fetal station but little pain. Treat the CTG and station change as possible rupture; epidural does not exclude it. Activate theatre and resuscitation immediately.
Scenario 3 — Postpartum collapse: After difficult labour, a woman becomes pale and hypotensive with abdominal distension and little vaginal bleeding. Suspect concealed intra-abdominal haemorrhage, activate major obstetric haemorrhage, start resuscitation and expedite surgical assessment.
Common errors to avoid
- Waiting for maternal hypotension or visible vaginal bleeding; fetal heart abnormalities may occur first.
- Continuing oxytocin/prostaglandin or delaying theatre for ultrasound, paperwork or a complete vaginal examination.
- Assuming an epidural excludes rupture because pain is minimal.
- Using large volumes of crystalloid without early blood-bank/massive-transfusion activation.
- Failing to prepare neonatal resuscitation or to document decision-to-delivery times.
RUPTURE NOW: R — Recognise fetal bradycardia/pain/shock; U — Uterotonics off; P — Phone obstetric, anaesthetic, theatre, neonatal and blood teams; T — Tilt left/oxygen/ABCDE; U — Use two IVs and crossmatch; R — Resuscitate with blood pathway; E — Expedite laparotomy; N — Neonatal resuscitation; O — Observe post-op; W — Watch for trauma, sepsis and coagulopathy.
Revision questions
- Define complete versus incomplete uterine rupture.
- List five risk factors and explain how induction/augmentation increases risk.
- What fetal heart-rate change is often the earliest sign?
- Why can an epidural mask the presentation?
- Outline the first five actions when rupture is suspected.
- What are the maternal and neonatal priorities during transfer to theatre?
Key takeaways
Suspected uterine rupture is a category-1 obstetric emergency. Stop uterotonics, call the full team, resuscitate the mother, monitor the fetus, activate blood support and expedite laparotomy—do not wait for classic pain, visible bleeding or imaging.
References for further study
- WHO. A Pocket Guide for Clinical Management of Obstetric and Neonatal Emergencies in Africa.
- NICE. Caesarean birth (NG192) — suspected uterine rupture as a category-1 emergency.
- RCOG. Birth after Previous Caesarean Birth (Green-top Guideline No. 45).
- ACOG. First and Second Stage Labor Management and VBAC resources.
- Follow current Uganda Ministry of Health emergency obstetric and neonatal care, haemorrhage, blood-transfusion and referral protocols.