Updated July 2026 · 8 min read
Part of the ICU Emergencies Hub — browse every related guide in one place.
HELLP can arrive with an almost-normal blood pressure and a complaint that sounds like heartburn — and then bleed, seize, or rupture a liver capsule. The nurse who reads the lab trend and takes right-upper-quadrant pain in a pregnant or postpartum woman seriously catches this disease before it turns catastrophic.
HELLP is a severe variant of preeclampsia named for its lab triad: Hemolysis, Elevated Liver enzymes, and Low Platelets. It is best understood as preeclampsia that has attacked the liver and the blood, and the danger is that it can look deceptively mild on the outside. Many women with HELLP have blood pressures that are only modestly elevated — or even normal — so a nurse waiting for a severe-range pressure to raise the alarm can be caught off guard. The presenting complaint is often right-upper-quadrant or epigastric pain, nausea, and malaise, and it gets mislabeled as reflux, gallbladder, or a stomach bug in a pregnant or recently delivered woman.
| Letter | What it reflects | Why it matters |
|---|---|---|
| Hemolysis | Red cells shredded in damaged small vessels | Anemia, rising LDH/bilirubin, schistocytes |
| Elevated Liver enzymes | Liver ischemia and stretch of the capsule | RUQ pain, risk of hematoma/rupture |
| Low Platelets | Platelets consumed at damaged vessel walls | Bleeding risk, can herald DIC |
Two things make HELLP a critical-care disease. The first is bleeding: platelets are falling and the coagulation system can tip into DIC, so any procedure, any delivery, and any trauma carries a heightened hemorrhage risk. The second is the liver itself. Severe HELLP can produce a subcapsular liver hematoma, and if that capsule ruptures the patient can exsanguinate into the abdomen — a sudden picture of shoulder-tip or worsening RUQ pain, hypotension, and shock. These patients also carry the full preeclampsia risk set: eclamptic seizures, pulmonary edema, placental abruption, and acute kidney injury.
The framework mirrors severe preeclampsia. Magnesium sulfate for seizure prophylaxis, antihypertensives for severe-range pressure, and, definitively, delivery — HELLP does not resolve until the pregnancy is over, and it often continues to worsen for the first day or two afterward before it turns the corner. Supportive care is where the ICU nurse lives: serial platelet and hemoglobin trends, transfusion of platelets or blood products to prepare for or respond to bleeding, careful fluid balance because these patients edge toward pulmonary edema, and vigilance for the liver catastrophe.
| Piece | Why |
|---|---|
| Magnesium sulfate | Seizure prophylaxis (same as preeclampsia) |
| Antihypertensives | Control severe-range pressure, protect the brain |
| Blood products / platelets | Manage bleeding risk and active hemorrhage |
| Delivery | Definitive treatment — may worsen 24–48 hr first |
Watch for the same eclampsia warnings as any preeclamptic patient — headache, visual changes, hyperreflexia. Watch the bleeding: oozing IV sites, bruising, mucosal bleeding, and a dropping hemoglobin. Watch the belly: escalating RUQ or new shoulder pain with hypotension is the liver-rupture story and demands immediate escalation. And do not relax after delivery — HELLP peaks postpartum, so the mother who just delivered is often the one who needs the closest eye. Keep blood products, magnesium, and antihypertensives close, and keep the OB, anesthesia, and critical-care teams looped in.
Related reading: preeclampsia & eclampsia, postpartum hemorrhage, the massive transfusion protocol, and IV magnesium.
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