34-year-old woman with postpartum headache and visual changes
A 34-year-old woman presents to the emergency department with a headache for two days. Six days ago, she had an uncomplicated spontaneous vaginal delivery at 39 weeks gestation. Her pregnancy was notable for normal blood pressures throughout. The headache is bilateral, pounding, and not relieved by acetaminophen. Today, she also reports seeing "shimmering spots" in her vision. She is a graphic designer and initially attributed her symptoms to long hours on a new project. Her temperature is 37.1°C (98.8°F), blood pressure is 168/108 mmHg, heart rate is 92/min, and respirations are 16/min. Examination shows 2+ pitting edema of the lower extremities and brisk 3+ patellar reflexes bilaterally. Laboratory results show a platelet count of 115,000/mcL, creatinine of 1.1 mg/dL, and AST of 85 U/L. Urinalysis shows 3+ proteinuria. Which of the following is the most appropriate next step in management?
See the answer and explanation below:
Post-Call Recovery Reads
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C
Explanation
Clinical Pearl:
Postpartum preeclampsia can develop in women with no prior history of hypertensive disorders of pregnancy. New-onset hypertension with headache or visual symptoms in the postpartum period should be treated as preeclampsia with severe features, with intravenous magnesium sulfate for seizure prophylaxis.
Explanation:
This patient presents with classic signs and symptoms of postpartum preeclampsia with severe features: new-onset severe-range hypertension, severe headache, visual disturbances, thrombocytopenia, elevated liver enzymes, and proteinuria, all developing within the first week after delivery. According to current obstetrics and gynecology society guidance, the most critical intervention is the initiation of intravenous magnesium sulfate to prevent eclamptic seizures, a life-threatening complication. While administering intravenous labetalol is also necessary to control the severe-range blood pressure, seizure prophylaxis with magnesium sulfate is the highest priority to prevent immediate neurologic catastrophe. A non-contrast head CT would be indicated for focal neurologic deficits or atypical features, but treatment for classic preeclampsia should not be delayed. Administering furosemide is incorrect as it can worsen the intravascular volume depletion characteristic of preeclampsia. Arranging for outpatient follow-up is dangerously inadequate given the acuity and severity of her presentation.
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