A 32-year-old multiparous woman at 28 weeks gestation with chronic hypertension presents with mild vaginal bleeding and mild abdominal pain. Vital signs are stable (BP 145/92 mmHg, HR 82 bpm). Fetal heart rate is 140 bpm with reactive NST. Ultrasound shows a small retroplacental clot (2 cm) with 60% placental abruption. Hemoglobin 10.8 g/dL, platelets 180,000/μL, fibrinogen 320 mg/dL. What is the most appropriate management?

Explanation

## Clinical Diagnosis: Grade 1–2 Abruptio Placentae **Key Point:** This patient has a **small retroplacental hematoma with mild symptoms, stable hemodynamics, reassuring fetal status, and normal coagulation parameters** — consistent with Grade 1 or early Grade 2 abruptio. Expectant management with close monitoring is appropriate. ### Severity Stratification | Parameter | This Patient | Grade 1 | Grade 2 | Grade 3 | |-----------|--------------|---------|---------|----------| | **Vaginal bleeding** | Mild | Mild | Moderate | Severe | | **Abdominal pain** | Mild | Mild | Moderate | Severe | | **Maternal BP** | 145/92 (stable) | Stable | Compensated | Shock | | **FHR pattern** | Reactive (140) | Normal | Abnormal | Bradycardia | | **Coagulation** | Normal (Fib 320) | Normal | Mild ↓ | Severe ↓ | | **Hematoma size** | 2 cm (small) | <10% | 10–20% | >20% | **High-Yield:** In **Grade 1 abruptio with stable mother and reassuring fetus**, expectant (conservative) management allows fetal maturation while maintaining readiness for emergency delivery if deterioration occurs. ### Management Pathway for Stable Abruptio ```mermaid flowchart TD A[Abruptio Placentae<br/>Grade 1–2]:::outcome --> B{Maternal stable?<br/>Fetus reassuring?}:::decision B -->|Yes| C[Admit for observation]:::action C --> D[Administer corticosteroids<br/>for fetal lung maturity]:::action D --> E[Continuous fetal monitoring]:::action E --> F[Serial ultrasound<br/>+ labs]:::action F --> G{Deterioration?}:::decision G -->|No| H[Plan delivery at<br/>34 weeks or viability]:::action G -->|Yes| I[Emergency delivery]:::urgent B -->|No| J[Emergency delivery<br/>Grade 3 protocol]:::urgent ``` ### Rationale for Expectant Management 1. **Fetal benefit:** At 28 weeks, each additional week of gestation significantly improves neonatal outcomes. Corticosteroids (betamethasone 12 mg IM × 2 doses 24 hours apart) reduce respiratory distress syndrome by ~50%. 2. **Maternal safety:** Normal coagulation parameters and stable hemodynamics allow safe observation. Continuous fetal monitoring will detect any deterioration requiring urgent delivery. 3. **Placental reserve:** A small (2 cm) retroplacental clot with only 60% abruption suggests partial separation; the remaining placenta can support the fetus if bleeding does not progress. 4. **Delivery at 34 weeks:** Balances fetal maturity (dramatically improved survival and morbidity) against risk of recurrent abruption (which occurs in ~10–15% of cases). **Clinical Pearl:** The **NST is the single most important test** in stable abruptio. A reactive NST with normal baseline and variability indicates fetal well-being and is reassuring for continued expectant management. Loss of reactivity or development of decelerations mandates urgent delivery. **Warning:** Do NOT discharge home — abruptio can recur suddenly and catastrophically. The patient must remain hospitalized with continuous monitoring. ### Corticosteroid Administration **Mnemonic: BCNS** — **B**etamethasone, **C**omplete course, **N**ot after 34 weeks (relative), **S**ingle course only. - **Dose:** Betamethasone 12 mg IM (or dexamethasone 6 mg IM × 4 doses 12 hours apart if betamethasone unavailable). - **Timing:** Optimal benefit if given 24 hours to 7 days before delivery. - **Indication:** All pregnancies 24–34 weeks with risk of preterm delivery. [cite:Williams Obstetrics 26e Ch 34; ACOG Practice Bulletin #181]