Severe Preeclampsia With HELLP and Fetal Growth Restriction at 31 Weeks
29-year-old G1P0 at 31+2 weeks presents with severe headache and right upper quadrant pain. BP 168/112 mmHg on two readings 15 minutes apart; reflexes brisk; urine protein-to-creatinine ratio 0.9. Platelets 92 × 10^9/L, AST 118 U/L, ALT 136 U/L, LDH 640 U/L, haptoglobin low, creatinine 88 µmol/L. Fetal ultrasound: estimated weight 1.3 kg (8th centile), AFI 6 cm, umbilical artery Doppler with elevated pulsatility index and absent end-diastolic flow. FHR tracing category I. She received betamethasone 12 hours ago. She has no prior hypertension, renal disease, or bleeding disorder. The cervix is closed, and the fetal membranes are intact. Her only medication is prenatal vitamins. She is 158 cm tall and weighs 82 kg. The unit has magnesium sulfate, labetalol, and a level III NICU.
1. Formulate the diagnosis and immediate maternal stabilization plan, including magnesium sulfate dosing and monitoring.
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She has severe preeclampsia with HELLP syndrome: BP at least 160/110, headache and right upper quadrant pain, proteinuria, thrombocytopenia, elevated transaminases, hemolysis, and renal involvement. Immediate priorities are seizure prophylaxis, blood pressure control, and delivery planning. Give magnesium sulfate 4–6 g IV loading dose over 20 minutes, followed by 1–2 g/hour, and monitor deep tendon reflexes, respiratory rate, urine output, and mental status; keep calcium gluconate at the bedside. Treat BP with IV labetalol in incremental doses or hydralazine, aiming for systolic below 160 and diastolic below 110 without abrupt hypotension. Restrict fluid to avoid pulmonary edema, place a Foley catheter for output, and check platelets, liver enzymes, and coagulation serially. Continue betamethasone because she is at 31 weeks, but do not let steroid completion delay delivery if maternal or fetal status deteriorates. Anesthesia and neonatology should be involved early.
2. How should the abnormal umbilical artery Doppler and growth restriction influence the timing of delivery at 31 weeks?
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Absent end-diastolic flow in the umbilical artery indicates significant placental insufficiency, and combined with severe preeclampsia and HELLP it makes prolonged expectant management unsafe. The fetus is growth restricted at the 8th centile with reduced amniotic fluid. At 31 weeks, corticosteroids have already been started, and the main reason to wait is to complete the 48-hour course if the mother is stable and fetal testing remains reassuring. However, maternal deterioration, worsening thrombocytopenia, liver dysfunction, abruption, or a nonreassuring fetal heart tracing should trigger immediate delivery regardless of steroid timing. Delivery should occur in a center with a level III NICU and cesarean capability. The mode of delivery depends on cervical favorability, fetal presentation, and maternal condition; severe preeclampsia itself is not an indication for cesarean. Continuous fetal monitoring and a clear threshold for expedited delivery are essential.
3. What postpartum risks must be monitored, and how does HELLP change anesthetic and transfusion planning?
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After delivery, HELLP can worsen for 24–48 hours, so continue magnesium sulfate for at least 24 hours postpartum and monitor platelets, liver enzymes, blood pressure, urine output, and signs of pulmonary edema or abruption. Risks include postpartum hemorrhage, disseminated intravascular coagulation, eclampsia, stroke, renal failure, and thromboembolism. Neuraxial anesthesia is generally avoided when platelets are below 70–80 × 10^9/L or there is coagulopathy because of epidural hematoma risk; general anesthesia may be needed for cesarean, with preparation for difficult airway and hypertension. Crossmatch blood, check fibrinogen, and have platelets and plasma available. Avoid NSAIDs if platelets are low or renal function is impaired. Continue antihypertensives postpartum and counsel about long-term cardiovascular risk. Document the placenta for pathology because placental insufficiency and abruption may explain the fetal growth restriction.