A 32-year-old multigravida (G3P2) at 34 weeks gestation is admitted with abdominal pain and vaginal bleeding. On examination, the uterus is tender, and the fetal lie is transverse. Fetal heart rate is 136 bpm. Ultrasound shows a transverse lie with the placenta on the anterior wall. The cervix is 2 cm dilated. What is the most appropriate immediate management?

Explanation

## Transverse Lie in Labour: Emergency Management ### Clinical Context This patient presents with: - **Transverse lie at 34 weeks** (unstable lie) - **Vaginal bleeding + abdominal pain** (suggests placental abruption or labour onset) - **Cervical dilation (2 cm)** (labour in progress) - **Anterior placenta** (may indicate placenta praevia or abruption) **Key Point:** Transverse lie with labour is an obstetric emergency. Vaginal delivery is impossible; the only safe option is caesarean section. Attempting ECV in active labour is contraindicated and dangerous. ### Why Immediate Caesarean Section? 1. **Labour with transverse lie = obstructed labour** → uterine rupture, fetal death, maternal exsanguination if allowed to progress. 2. **Vaginal bleeding + pain** → suggests abruption or uterine irritability; labour is imminent or ongoing. 3. **Cervical dilation** → labour is established; ECV is contraindicated. 4. **Fetal viability at 34 weeks** → neonatal survival >95% with modern NICU care; delivery is safer than expectant management. **High-Yield:** Transverse lie in labour is a **Category 1 (crash) caesarean indication**. Do not delay for investigations or ECV attempts. [cite:ACOG Obstetric Care Consensus] ### Transverse Lie: Risk Factors & Prevention | Risk Factor | Mechanism | |---|---| | Multiparity | Lax uterine muscles | | Placenta praevia | Occupies lower segment, prevents vertex engagement | | Uterine anomaly | Distorted cavity | | Polyhydramnios | Excess mobility | | Fetal anomaly (e.g. anencephaly) | Abnormal fetal shape | | Previous transverse lie | Recurrence risk ~10% | **Clinical Pearl:** Transverse lie persists in ~10% of pregnancies if undetected at term. Routine antenatal care at 36 weeks should identify and manage it (ECV, admission, planned CS). **Mnemonic — Transverse Lie Complications: RUPT** - **R**upture (uterine) - **U**mbilical cord prolapse (if membranes rupture) - **P**rolapsed arm / fetal part - **T**otal fetal loss (if labour continues) ### Decision Tree for Transverse Lie ```mermaid flowchart TD A[Transverse lie detected]:::outcome --> B{In labour or rupture signs?}:::decision B -->|Yes| C[Emergency CS immediately]:::urgent B -->|No| D{Gestation <36 weeks?}:::decision D -->|Yes| E[Bed rest, tocolytics, steroids]:::action D -->|No| F{Contraindications to ECV?}:::decision F -->|Yes| G[Planned CS at 37-39 weeks]:::action F -->|No| H[Attempt ECV at 37 weeks]:::action H --> I{Successful?}:::decision I -->|Yes| J[Vaginal delivery or planned CS]:::action I -->|No| K[Planned CS at 39 weeks]:::action ```