A 28-year-old primigravida at 34 weeks gestation presents to the antenatal clinic with a blood pressure of 158/102 mmHg. She reports a frontal headache and right upper quadrant pain for the past 6 hours. On examination, she has brisk reflexes with 2 beats of clonus. Urine dipstick shows 2+ proteinuria. Her platelet count is 95,000/μL, serum creatinine is 1.2 mg/dL, and AST is 68 U/L. What is the most appropriate immediate next step in management?

Explanation

## Clinical Diagnosis This patient presents with **severe preeclampsia with severe features** at 34 weeks gestation: **Key Point:** The clinical triad of severe hypertension (≥160/110 mmHg), severe headache with right upper quadrant pain, and thrombocytopenia (platelet count <100,000/μL) with elevated transaminases indicates **HELLP syndrome** (Hemolysis, Elevated Liver enzymes, Low Platelets) — a life-threatening variant of severe preeclampsia. ## Diagnostic Criteria Met | Feature | Finding | Criterion for Severe Preeclampsia | |---------|---------|-----------------------------------| | Blood pressure | 158/102 mmHg | ≥160/110 mmHg | | Headache | Present, frontal | Severe symptom | | Right upper quadrant pain | Present | Hepatic involvement | | Platelets | 95,000/μL | <100,000/μL | | Serum creatinine | 1.2 mg/dL | >1.1 mg/dL (elevated) | | AST | 68 U/L | >2× upper limit normal | | Proteinuria | 2+ | Present | | Clonus | 2 beats | Hyperreflexia present | ## Management Algorithm ```mermaid flowchart TD A[Severe Preeclampsia/HELLP at 34 weeks]:::outcome --> B{Maternal/fetal stability?}:::decision B -->|Unstable or deteriorating| C[Immediate delivery]:::urgent B -->|Stable| D[Corticosteroids for fetal lung maturity]:::action D --> E[Antihypertensive therapy]:::action E --> F[Plan delivery within 24 hours]:::action C --> G[Prepare for emergency cesarean]:::action F --> H[Vaginal delivery if cervix favorable]:::action H --> I[Cesarean if not progressing]:::action ``` ## Rationale for Correct Answer **High-Yield:** At 34 weeks with HELLP syndrome, the standard of care is **delivery within 24 hours** after maternal stabilization with corticosteroids for fetal lung maturity. **Key Point:** 1. **Administer intramuscular betamethasone** (12 mg × 2 doses, 24 hours apart) to accelerate fetal lung maturity and reduce neonatal morbidity/mortality — this is standard even at 34 weeks when delivery is imminent. 2. **Arrange urgent delivery within 24 hours** — HELLP syndrome is an indication for delivery regardless of gestational age because maternal mortality risk escalates rapidly. Vaginal delivery is preferred if cervix is favorable; otherwise, cesarean section. **Clinical Pearl:** The presence of **2 beats of clonus** (ankle clonus) is a sign of severe CNS hyperreflexia and increased seizure risk — this mandates urgent delivery and seizure prophylaxis (magnesium sulfate). ## Why NOT Expectant Management Expectant management (option 1) is **contraindicated** in HELLP syndrome because: - Platelet count <100,000/μL indicates active hemolysis and thrombocytopenia. - Elevated transaminases signal hepatic injury. - Maternal mortality increases with each hour of delay. - Expectant management is reserved for preeclampsia *without* severe features at <34 weeks. ## Why NOT Observation Alone Oral nifedipine (option 3) alone is **inadequate** because: - It does not address the underlying HELLP pathology. - Observation for 48 hours risks maternal eclampsia, pulmonary edema, acute kidney injury, or placental abruption. - Delivery is the definitive treatment for HELLP syndrome. ## Why NOT Immediate Cesarean Without Corticosteroids Emergency cesarean (option 4) **without prior corticosteroid administration** is suboptimal because: - A 24-hour window allows one dose of betamethasone, which significantly reduces neonatal respiratory distress syndrome, intraventricular hemorrhage, and neonatal death. - If maternal condition deteriorates acutely (eclampsia, pulmonary edema, DIC), emergency cesarean is performed immediately, but the initial approach is stabilization + corticosteroids + planned delivery. ## Seizure Prophylaxis **Key Point:** Magnesium sulfate (loading dose 4–6 g IV over 20–30 minutes, then 1–2 g/hour infusion) must be started immediately for seizure prophylaxis in severe preeclampsia with severe features.