Headache at 33 Weeks in a Freestanding Birth Center
Amara, 34, G3P1011, is 33 weeks 4 days by a 9-week dating scan. She presents to a freestanding birth center for a routine visit. Blood pressure is 152/98, and repeated after 10 minutes in the left lateral position it is 154/100; her baseline this pregnancy was 108/68. She reports a frontal headache for 3 days that acetaminophen 650 mg every 6 hours has not touched, plus new floaters in her vision. Deep tendon reflexes are 2+ with no clonus. Labs drawn an hour ago: platelets 102,000, AST 74, creatinine 0.9, urine protein/creatinine ratio pending. Dipstick protein is 3+. She has no contractions, membranes are intact, and the fetal heart rate is 140 with a reactive NST. The receiving hospital with MFM and a level III nursery is 40 minutes away by ground.
1. State your working diagnosis with the specific findings that support it, then list your first five actions in order.
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Diagnosis: preeclampsia with severe features at 33w4d.
The diagnosis needs new hypertension after 20 weeks plus proteinuria or maternal organ dysfunction; she has both. What upgrades her is the headache unrelieved by ordinary analgesics, which counts as a severe feature independent of the blood pressure number. Resist the temptation to discount it because 154/100 is not in the severe range and platelets of 102,000 sit just above the 100,000 cut-off - one severe feature is sufficient.
- Call the receiving MFM/OB and activate transfer. Severe features are outside freestanding birth center scope regardless of how well she looks.
- Start magnesium sulfate (4–6 g IV over 15–20 minutes, then 1–2 g/h) before or during transport; monitor reflexes, respiratory rate, and urine output.
- Betamethasone 12 mg IM now, repeat in 24 hours. At <34 weeks this reduces RDS and IVH, and it does not obligate you to delay delivery if she deteriorates.
- Continuous fetal monitoring and maternal vitals every 15 minutes; send CBC, LFTs, creatinine, urine protein/creatinine, type and screen.
- Antihypertensives only for persistent ≥160/110 - not for her current pressures.
Expectant management to 34 weeks is reasonable only in a facility with MFM and continuous monitoring, which is why transfer and steroids are not competing priorities.
2. As you prepare transfer, Amara says she feels fine, wants to go home to pack, and plans to drive herself. How do you respond, and what do you document?
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This is informed refusal, and the response is a structured conversation, not a lecture.
Name the risk plainly: she has preeclampsia with severe features. Over the next hours to days she is at risk of seizure, stroke, placental abruption, and fetal compromise - events that can occur without warning and are the reason magnesium and continuous monitoring are recommended. Driving herself adds the risk of a seizure or visual change behind the wheel.
Make the recommended path easy: offer to call EMS or a family member now, start magnesium before departure, and state that the birth center cannot provide the monitoring severe features require. Say explicitly that you are not abandoning her - you will call report, send records, and follow up.
Assess capacity: she understands the information and can reason with it, so she may refuse. If she does: document the specific risks disclosed, her questions and statements in her own words, that she was offered EMS and magnesium, your consultant notification, and the written warning-sign list you gave her. Do not discharge her to home without a documented plan and a scheduled contact.
If she stays, she stays under continuous monitoring with magnesium running and a low threshold to activate EMS for seizure, severe hypertension, or nonreassuring fetal status.
3. While awaiting transport her BP is 168/112 on two readings 10 minutes apart. What do you do and why?
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Treat now - this is a persistent severe-range pressure, and the purpose is stroke prevention, not comfort.
Agent: labetalol 20 mg IV, hydralazine 5–10 mg IV, or immediate-release nifedipine 10 mg PO, repeated as needed per protocol, aiming for 130–150/80–100 within 30–60 minutes.
Why not lower it faster: a precipitous drop can reduce uteroplacental perfusion and cause fetal compromise. Aim for a controlled step-down, not a normal blood pressure.
Two traps to avoid:
- Magnesium is not an antihypertensive. It prevents and treats seizures; it will not bring 168/112 down.
- Do not let this delay transport. A severe-range pressure after 20 weeks, with her headache, is an indication for treatment and escalation, not a reason to settle in and watch.
Recheck every 10–15 minutes, keep continuous fetal monitoring, watch for pulmonary edema (crackles, falling saturation), and repeat labs to track platelets and transaminases. If pressures are refractory after repeated doses, that is a medical emergency requiring the receiving facility's protocol and likely magnesium continuation plus urgent delivery planning.