A 32-year-old primigravida at 34 weeks gestation presents to the emergency department with sudden onset of severe abdominal pain and vaginal bleeding. She reports a history of poorly controlled hypertension (BP 160/100 mmHg today) and denies any trauma. On examination, the uterus is tender and rigid with a board-like consistency. Fetal heart rate is 90 bpm (baseline 140 bpm). Ultrasound shows a large retroplacental clot. Her hemoglobin is 9.2 g/dL (was 11.5 g/dL one week ago), and coagulation profile shows PT 16 sec, aPTT 38 sec, fibrinogen 180 mg/dL, and D-dimer elevated. What is the most appropriate immediate management?

Explanation

## Clinical Diagnosis: Abruptio Placentae with Disseminated Intravascular Coagulation (DIC) ### Key Clinical Features Pointing to Diagnosis **Key Point:** The triad of sudden severe abdominal pain, vaginal bleeding, and uterine tenderness with a board-like uterus in the third trimester is pathognomonic for abruptio placentae. - Hypertension is the strongest risk factor for placental abruption - Retroplacental clot on ultrasound confirms diagnosis - Fetal bradycardia (90 bpm) indicates fetal distress and placental insufficiency - Acute drop in hemoglobin (11.5 → 9.2 g/dL) indicates significant concealed hemorrhage ### Coagulopathy Assessment | Parameter | Finding | Significance | |-----------|---------|---------------| | Fibrinogen | 180 mg/dL | Moderately reduced (normal >250); indicates DIC | | PT | 16 sec | Prolonged; factor consumption | | aPTT | 38 sec | Prolonged; factor consumption | | D-dimer | Elevated | Confirms ongoing thrombin generation and fibrinolysis | | Hemoglobin | 9.2 g/dL | Acute anemia from concealed hemorrhage | **High-Yield:** Abruptio placentae causes DIC through release of thromboplastic substances from damaged placental tissue into maternal circulation. ### Management Algorithm ```mermaid flowchart TD A[Abruptio Placentae Diagnosed]:::outcome --> B{Maternal/Fetal Stability?}:::decision B -->|Fetal distress + DIC| C[Correct Coagulopathy First]:::action C --> D[FFP 4-6 units + Cryoprecipitate 10 units]:::action D --> E[Recheck PT/aPTT/Fibrinogen]:::action E --> F[Target: Fibrinogen >100 mg/dL]:::action F --> G[Emergency Cesarean Section]:::action G --> H[Fetal & Maternal Survival]:::outcome B -->|Stable, <34 weeks| I[Consider Expectant Management]:::action ``` ### Why Correct Answer (Option B) is Correct **Clinical Pearl:** In abruptio placentae with DIC and fetal distress, the sequence is critical: 1. **Rapid coagulopathy correction** (FFP + cryoprecipitate) — essential to prevent intraoperative hemorrhage 2. **Emergency cesarean section** — indicated for fetal distress (bradycardia) and maternal hemorrhage **Key Point:** Fibrinogen <100 mg/dL or rapidly falling fibrinogen is an indication for cryoprecipitate. FFP provides factors II, V, VII, IX, X; cryoprecipitate provides fibrinogen, factor VIII, von Willebrand factor, and fibronectin. The fetal bradycardia (90 bpm) and retroplacental clot indicate imminent fetal demise — cesarean section cannot be delayed beyond coagulopathy correction. [cite:Williams Obstetrics 26e Ch 34]