A 32-year-old multiparous woman at 30 weeks of gestation is referred from the primary health center with a blood pressure of 152/98 mmHg recorded on two occasions 4 hours apart. She denies headache, visual disturbances, or epigastric pain. Physical examination is unremarkable except for elevated BP. Urine dipstick shows trace proteinuria (

Question

A 32-year-old multiparous woman at 30 weeks of gestation is referred from the primary health center with a blood pressure of 152/98 mmHg recorded on two occasions 4 hours apart. She denies headache, visual disturbances, or epigastric pain. Physical examination is unremarkable except for elevated BP. Urine dipstick shows trace proteinuria (<1+). Platelet count is 210,000/μL, serum creatinine is 0.9 mg/dL, and liver enzymes are normal. Fetal heart rate is 140 bpm with reactive NST. What is the most appropriate next step in management?

Accepted Answer

A. Initiate oral antihypertensive therapy (labetalol or nifedipine) and arrange twice-weekly antenatal monitoring as outpatient. ## Clinical Diagnosis: Gestational Hypertension (Preeclampsia Without Severe Features) This patient meets criteria for preeclampsia (hypertension + proteinuria) but lacks severe features, allowing for outpatient management with close monitoring at 30 weeks gestation. ### Diagnostic Classification | Criterion | This Patient | Severe Preeclampsia? | |-----------|--------------|---------------------| | BP | 152/98 mmHg (≥140/90 on 2 occasions) | No (requires ≥160/110) | | Proteinuria | Trace (<1+) | No (requires ≥1+) | | Platelets | 210,000/μL | No (requires <100,000) | | Creatinine | 0.9 mg/dL | No (requires >1.1) | | Liver enzymes | Normal | No (requires >2× ULN) | | Symptoms | None (no headache, visual changes, epigastric pain) | No severe features | | Fetal status | Reactive NST, HR 140 | Reassuring | **Key Point:** This is **preeclampsia without severe features** (formerly called "preeclampsia without severe range BP"). Expectant management with intensive outpatient monitoring is appropriate at 30 weeks. ### Management Algorithm for Preeclampsia Without Severe Features at <34 Weeks ```mermaid flowchart TD A[Preeclampsia without severe features
Gestation <34 weeks]:::outcome --> B{Maternal/fetal stability?}:::decision B -->|Yes| C[Initiate oral antihypertensive]:::action C --> D[Twice-weekly antenatal visits]:::action D --> E[Weekly labs: CBC, LFTs, Cr]:::action E --> F[Twice-weekly NST]:::action F --> G{Progression to severe features?}:::decision G -->|No| H[Continue expectant management
until 37 weeks or labor]:::action G -->|Yes| I[Admit, MgSO4, deliver
within 24-48 hrs]:::urgent B -->|No| I ``` **High-Yield:** At <34 weeks with preeclampsia WITHOUT severe features, **expectant management with close outpatient monitoring is standard**. Delivery is NOT indicated unless severe features develop or fetal compromise occurs. ### Antihypertensive Therapy in Preeclampsia **Indications for treatment:** - Sustained BP ≥160/110 mmHg (severe range) → treat immediately - Sustained BP ≥140/90 mmHg with proteinuria (preeclampsia) → treat to prevent progression - Target: Maintain BP 140–150 systolic, 90–100 diastolic (avoid excessive lowering → placental hypoperfusion) **First-line oral agents:** | Agent | Dosing | Onset | Notes | |-------|--------|-------|-------| | **Labetalol** | 200 mg BD, titrate to 400 mg BD | 2–4 hours | Preferred in pregnancy; α + β blocker | | **Nifedipine (ER)** | 10–20 mg BD, titrate to 40 mg BD | 30 min–2 hours | Dihydropyridine; safe in pregnancy | | **Methyldopa** | 250 mg BD–TID | 4–6 hours | Slower onset; less commonly used now | **Avoid:** ACE inhibitors, ARBs, atenolol (teratogenic or adverse fetal effects). ### Monitoring Schedule for Preeclampsia Without Severe Features 1. **Antenatal visits:** Twice weekly (BP, symptoms, weight, urine protein) 2. **Laboratory tests:** Weekly CBC, liver enzymes, serum creatinine 3. **Fetal assessment:** Twice-weekly NST; ultrasound for growth if indicated 4. **Patient education:** Red-flag symptoms (headache, visual changes, epigastric pain, decreased fetal movement) **Clinical Pearl:** Preeclampsia can progress rapidly. Any development of severe features (BP ≥160/110, thrombocytopenia, elevated transaminases, neurological symptoms, pulmonary edema) mandates immediate hospitalization, magnesium sulphate, and delivery within 24–48 hours. ### Why NOT Magnesium Sulphate Now? - Magnesium sulphate is **seizure prophylaxis** for severe preeclampsia or eclampsia, not for mild-to-moderate disease - This patient has no severe features and is at low eclampsia risk - Routine use in preeclampsia without severe features increases maternal adverse effects without benefit ### Why NOT Corticosteroids or Delivery Now? - **Corticosteroids:** Indicated only if delivery is anticipated within 7 days (e.g., severe preeclampsia at 30 weeks planned for delivery). Not indicated for expectant management. - **Delivery:** Indicated at ≥37 weeks (or earlier if severe features develop). At 30 weeks with stable disease, benefits of in-utero maturation outweigh risks of prematurity. **Mnemonic: HELLP = Severe Preeclampsia Subset** — This patient does NOT have HELLP (normal platelets, normal LFTs), so expectant management is safe. **Warning:** Do NOT confuse gestational hypertension (elevated BP without proteinuria) with preeclampsia (elevated BP + proteinuria). This patient has proteinuria (trace), so the diagnosis is preeclampsia, not gestational hypertension alone. [cite:Williams Obstetrics 26e Ch 34; ACOG Practice Bulletin 202]

Answer

B. Admit for inpatient observation and initiate IV magnesium sulphate immediately

Answer

C. Administer a single dose of intramuscular betamethasone and plan delivery at 32 weeks

Answer

D. Perform immediate cesarean section to prevent progression to eclampsia

Explanation

Clinical Diagnosis: Gestational Hypertension (Preeclampsia Without Severe Features)

Diagnostic Classification

Management Algorithm for Preeclampsia Without Severe Features at <34 Weeks

Antihypertensive Therapy in Preeclampsia

Monitoring Schedule for Preeclampsia Without Severe Features

Why NOT Magnesium Sulphate Now?

Why NOT Corticosteroids or Delivery Now?

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Criterion	This Patient	Severe Preeclampsia?
BP	152/98 mmHg (≥140/90 on 2 occasions)	No (requires ≥160/110)
Proteinuria	Trace (<1+)	No (requires ≥1+)
Platelets	210,000/μL	No (requires <100,000)
Creatinine	0.9 mg/dL	No (requires >1.1)
Liver enzymes	Normal	No (requires >2× ULN)
Symptoms	None (no headache, visual changes, epigastric pain)	No severe features
Fetal status	Reactive NST, HR 140	Reassuring

Agent	Dosing	Onset	Notes
Labetalol	200 mg BD, titrate to 400 mg BD	2–4 hours	Preferred in pregnancy; α + β blocker
Nifedipine (ER)	10–20 mg BD, titrate to 40 mg BD	30 min–2 hours	Dihydropyridine; safe in pregnancy
Methyldopa	250 mg BD–TID	4–6 hours	Slower onset; less commonly used now