A 32-year-old multiparous woman at 38 weeks gestation is admitted for planned vaginal delivery. She has a history of severe postpartum hemorrhage in her previous two deliveries, managed with oxytocin and blood transfusion. For prevention of PPH in this high-risk case, what is the drug of choice for active management of the third stage of labor?

Explanation

## Prevention of Postpartum Hemorrhage in High-Risk Cases **Key Point:** Oxytocin 10 IU given immediately after delivery of the baby (before placental delivery) is the gold-standard prophylactic uterotonic for prevention of PPH, especially in high-risk patients. ### Active Management of Third Stage of Labor (AMTSL) AMTSL comprises three components: 1. **Uterotonic administration** (immediately after baby delivery, before placental delivery) 2. **Controlled cord traction** (after signs of placental separation) 3. **Uterine massage** (after placental delivery) **High-Yield:** Oxytocin is the only uterotonic recommended for PROPHYLAXIS (prevention) of PPH. Ergot alkaloids and misoprostol are used for TREATMENT (after PPH has occurred). ### Why Oxytocin for Prevention | Aspect | Oxytocin | Ergot Alkaloids | Misoprostol | |--------|----------|-----------------|-------------| | **Timing** | Before placental delivery | After placental delivery | Before or after | | **Indication** | Prophylaxis & treatment | Treatment only | Treatment (limited prophylaxis) | | **Mechanism** | Sustained contraction | Tetanic contraction | Sustained contraction | | **Efficacy in prevention** | Excellent (30–40% ↓ PPH) | Not established for prevention | Moderate | | **Safety in retained placenta** | Safe | Risk of uterine tetany | Safe | | **Contraindications** | Minimal | HTN, preeclampsia, CAD | — | **Clinical Pearl:** In this high-risk multiparous woman with recurrent PPH, oxytocin prophylaxis should be given immediately after delivery of the baby (not after placental delivery). This allows sustained uterine contraction before the placenta separates, reducing bleeding from placental bed. ### Timing of Uterotonic Administration ```mermaid flowchart TD A[Vaginal Delivery]:::outcome --> B[Delivery of Baby]:::outcome B --> C[Immediate: Oxytocin 10 IU IV/IM]:::action C --> D[Signs of Placental Separation?]:::decision D -->|Yes| E[Controlled Cord Traction + Uterine Massage]:::action D -->|No| F[Wait 5–10 min, reassess]:::action E --> G[Placental Delivery]:::outcome G --> H{PPH ongoing?}:::decision H -->|Yes| I[Escalate: Ergot alkaloid or Misoprostol]:::action H -->|No| I2[Continue oxytocin infusion, monitor]:::action ``` **Warning:** ~~Ergot alkaloids should NOT be given before placental delivery~~ — risk of uterine tetany, retained placenta, and concealed hemorrhage. Ergot alkaloids are used AFTER placental delivery if bleeding continues. ### Evidence for Oxytocin Prophylaxis - **Cochrane review:** Oxytocin reduces PPH incidence by 30–40% when given prophylactically - **WHO recommendation:** Oxytocin 10 IU IM/IV immediately after delivery of baby is the standard for AMTSL - **RCOG guideline:** Oxytocin is the first-line uterotonic for prevention and treatment of PPH **Mnemonic:** **POPH** — Prophylaxis Of Postpartum Hemorrhage = Oxytocin (given before placental delivery).