At 34 weeks, epigastric pain and malaise with a blood pressure of 155/95 mm Hg do not diagnose HELLP. They do make it unsafe to use the severe-range blood-pressure threshold as a rule-out. The case also lacks important context—baseline blood pressure, prior laboratory results, pain duration, and a repeat reading—so the right move is focused evaluation, not a confident label.
A blood-pressure category is not a HELLP rule-out
A reading of 155/95 is elevated but below the severe range of 160 systolic or 110 diastolic. In someone previously normotensive, a formal diagnosis of gestational hypertension generally requires two elevated readings at least four hours apart, unless severe-range pressure requires faster action. That classification addresses blood-pressure severity; it does not decide whether HELLP is developing. Nor does a non-severe-range reading alone establish that the overall presentation lacks severe features; symptoms and other end-organ findings must be assessed separately.
HELLP can present atypically without hypertension, proteinuria, or both; ACOG notes that up to 15% of cases lack one or both. Epigastric or right-upper-quadrant pain and malaise are warning symptoms, but neither is specific enough to establish HELLP alone.
The mechanism explains why the number on the cuff is not a gate for testing. HELLP involves microvascular injury associated with pregnancy-related endothelial dysfunction: red cells can be damaged, platelets consumed, and the liver injured. Liver involvement may cause upper abdominal pain, but the same symptom can arise from other hepatic, biliary, or gastrointestinal problems. Symptoms raise concern; laboratory patterns and the clinical course refine it.
Ask whether the pattern is present—and whether it is changing
Start by confirming the blood pressure with an appropriate cuff and repeat measurement. Ask about the patient’s usual pressure, prior platelet and liver-enzyme results, onset and persistence of pain, vomiting, headache or visual symptoms, dyspnea, bleeding, and relevant renal, hepatic, or hematologic conditions. A single value is harder to interpret without that baseline.
A focused initial laboratory assessment commonly includes a CBC with platelet count, AST and ALT, creatinine, and tests for hemolysis such as LDH, bilirubin, and—when useful—haptoglobin or a peripheral smear. Urine protein helps assess the broader preeclampsia picture, but a negative result does not rule out HELLP.
Many clinicians use a laboratory benchmark of LDH at least 600 U/L, AST/ALT above twice the upper limit of normal, and platelets below 100,000/µL. Diagnostic benchmarks can vary. Use the pattern to recognize established disease, not as a reason to postpone obstetric discussion or repeat testing when symptoms persist and early results are subtle.
| Finding | How to use it | What it does not establish |
|---|---|---|
| BP 155/95 | Repeat it and interpret it alongside baseline and symptoms; it is below severe range | That HELLP is absent—or that gestational hypertension is confirmed from one reading |
| No proteinuria | Consider it as part of the preeclampsia assessment | That HELLP is excluded |
| Platelets still in range but falling from baseline | Treat the trend as a reason to reassess in context | HELLP by itself; a downward trend is a warning, not a diagnosis |
| Epigastric pain | Investigate for pregnancy-related disease and other causes | HELLP without supporting clinical or laboratory evidence |
Make repeat testing part of the plan
One reassuring panel is a snapshot. If pain persists or worsens, blood pressure rises, or the overall condition changes, reassess rather than treating the first result as clearance. Repeat the relevant CBC, liver and hemolysis studies, and other tests according to the patient’s trajectory and the obstetric team’s plan. A downward platelet trend may matter before the count crosses a diagnostic threshold, but it is not diagnostic on its own.
Guidance on the interval for established HELLP is not identical. ACOG describes close monitoring with laboratory testing at least every 12 hours; a 2024 guideline from German-, Austrian-, and Swiss obstetric societies recommends initial repeats every 6–8 hours, especially when early changes are subtle or the classic pattern is incomplete. These are monitored-care frameworks, not a universal ED timer. Deterioration calls for action sooner, not waiting for the next scheduled draw.
Escalate the concern, not just the blood pressure
Contact obstetrics early when HELLP is plausible, and arrange gestation-appropriate fetal assessment through the local pathway. If symptoms persist, laboratory findings evolve, or the patient is clinically unwell, plan monitored specialist reassessment rather than discharge based only on one non-severe pressure or one initial panel. If appropriate obstetric and maternal-care resources are not available locally, discuss transfer early.
The ED role is to recognize the risk, stabilize the patient, gather useful trends, and bring the right team into the decision. If HELLP is established, the obstetric team coordinates further stabilization and delivery planning; the ED should not wait for every result to return before making that consultation.
Practical takeaways
- 155/95 is below severe range, not a HELLP exclusion test. Repeat the pressure and interpret it with the patient’s baseline and symptoms.
- Third-trimester epigastric or right-upper-quadrant pain warrants a focused evaluation. Check platelets, liver enzymes, renal function, and hemolysis markers; urine protein is not a rule-out.
- A single normal or borderline panel may not settle an evolving presentation. Reassess the patient, trend concerning results with obstetrics, and match the monitoring plan to the clinical trajectory.
