Severe pre-eclampsia with HELLP at 33+4 weeks
Amara is a 34-year-old G2P1 at 33+4 weeks' gestation who attends triage with a 3-day history of frontal headache and visual flashing lights. Her blood pressure is 168/112 mmHg on two readings 15 minutes apart, and urine dipstick shows 3+ protein. She has brisk reflexes and mild right upper-quadrant tenderness. Bloods: platelets 92 × 10^9/L, AST 118 U/L, ALT 96 U/L, creatinine 92 µmol/L, uric acid 410 µmol/L. The cardiotocograph is normal with no contractions. She had an uncomplicated vaginal delivery at term three years ago. She is Rh positive and has no comorbidities. The maternity unit has a level 2 neonatal unit and access to adult intensive care, but no on-site interventional radiology. She is keen to know whether she can go home to arrange childcare.
1. What is your immediate management, and how do you decide the timing and mode of delivery?
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This is severe pre-eclampsia with HELLP syndrome at 33+4 weeks. Admit to obstetric high-dependency care, start continuous maternal and fetal monitoring, and secure IV access. Give magnesium sulfate for seizure prophylaxis (4 g loading dose over 20 minutes, then 1 g/hour) and treat systolic BP ≥160 mmHg or diastolic ≥110 mmHg with IV labetalol or hydralazine to a target of <150/100 mmHg, avoiding sudden hypotension. Give betamethasone if delivery is not immediately required. Delivery is indicated because of severe features, but the exact timing is a trade-off: if platelets, liver enzymes, blood pressure and fetal status are stable, a 24–48-hour window allows steroids to act; do not delay for steroids if there is worsening HELLP, uncontrolled hypertension, renal impairment, pulmonary oedema, abruption or non-reassuring CTG. At 33+4 weeks, plan delivery in a unit with neonatal support. Mode depends on cervical favourability, fetal lie and CTG: vaginal birth is reasonable for a cephalic, stable fetus, but caesarean section is indicated for fetal compromise, malpresentation or failed induction. Avoid ergometrine postpartum and use oxytocin with careful fluid balance.
2. How would you counsel her about magnesium sulfate and what monitoring would you institute?
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Explain that magnesium sulfate reduces the risk of eclamptic seizures but causes flushing, nausea, heaviness, and at higher levels respiratory depression, loss of reflexes and oliguria. It is given IV and continued for 24 hours after delivery or after the last seizure. Monitor respiratory rate (at least 12–16/min), deep tendon reflexes, hourly urine output, oxygen saturation and conscious level; check serum magnesium if there is renal impairment or clinical concern. Keep calcium gluconate at the bedside as an antidote. Restrict maintenance fluids to about 80 mL/hour unless there is another indication, because pre-eclampsia predisposes to pulmonary oedema. Document fluid balance and avoid fluid boluses without senior review. If she develops oliguria, reduce or stop magnesium and reassess. Explain that magnesium does not treat the hypertension itself, so antihypertensives continue. After delivery, monitor blood pressure for at least 72 hours, check platelets and liver enzymes until improving, and give thromboprophylaxis once bleeding risk is acceptable.
3. What postpartum risks would you anticipate, and how does this affect delivery planning?
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Even after delivery, HELLP can worsen for 24–48 hours. Anticipate postpartum haemorrhage from thrombocytopenia and uterine atony, so avoid ergometrine and have uterotonics and blood products available. Monitor for pulmonary oedema, acute kidney injury, liver haematoma or rupture, and hypertensive crisis. She needs strict input/output monitoring, repeated full blood count, renal and liver function, and early senior review if platelets fall or liver enzymes rise. Because she is at high risk of venous thromboembolism, use mechanical prophylaxis initially and start low-molecular-weight heparin when bleeding has settled. Plan delivery where there is adult intensive care and neonatal level 2 support; this unit has both, so transfer is not needed. Counsel that recurrence risk in future pregnancy is significant and that prepregnancy counselling and low-dose aspirin should be discussed.