🫃 BISAP Score (Pancreatitis Severity)
Predict mortality in acute pancreatitis within 24 hours using the BISAP score.
Clinical takeaway
Calculable within the first 24 h (unlike Ranson).
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When to use
Early severity assessment in acute pancreatitis.
How it works
1 point each: BUN > 25 mg/dL, impaired mental status, SIRS, age > 60, pleural effusion. ≥ 3 = high risk.
Key points
- Calculable within the first 24 h (unlike Ranson).
- ≥ 3 marks higher mortality and organ failure risk.
- Combine with revised Atlanta criteria and imaging.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| BUN > 25 mg/dL | No |
|---|---|
| Impaired mental status (GCS < 15) | No |
| SIRS (≥ 2 criteria) | No |
| Age > 60 | No |
| Pleural effusion | No |
→BISAP0/5
- Mortality (approx.)：< 2%
- Interpretation：Lower risk.
| BUN > 25 mg/dL | Yes (+1) |
|---|---|
| Impaired mental status (GCS < 15) | Yes (+1) |
| SIRS (≥ 2 criteria) | Yes (+1) |
| Age > 60 | Yes (+1) |
| Pleural effusion | Yes (+1) |
→BISAP5/5
- Mortality (approx.)：~13–22%
- Interpretation：High risk — consider higher level of care.
Frequently asked questions
- What is BISAP Score (Pancreatitis Severity)?
- Predict mortality in acute pancreatitis within 24 hours using the BISAP score.
- How is BISAP Score (Pancreatitis Severity) calculated? What is the core formula?
- 1 point each: BUN > 25 mg/dL, impaired mental status, SIRS, age > 60, pleural effusion. ≥ 3 = high risk.
- When is BISAP Score (Pancreatitis Severity) used?
- Early severity assessment in acute pancreatitis.
- What are the key clinical points for BISAP Score (Pancreatitis Severity)?
- Calculable within the first 24 h (unlike Ranson). ≥ 3 marks higher mortality and organ failure risk. Combine with revised Atlanta criteria and imaging.
- What are the limits and cautions when using BISAP Score (Pancreatitis Severity)?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is BISAP Score (Pancreatitis Severity) calculated in practice? Can you show a worked example?
- Inputs: BUN > 25 mg/dL No, Impaired mental status (GCS < 15) No, SIRS (≥ 2 criteria) No, Age > 60 No, Pleural effusion No → Result: BISAP 0 /5（Mortality (approx.): < 2%, Interpretation: Lower risk.） Inputs: BUN > 25 mg/dL Yes (+1), Impaired mental status (GCS < 15) Yes (+1), SIRS (≥ 2 criteria) Yes (+1), Age > 60 Yes (+1), Pleural effusion Yes (+1) → Result: BISAP 5 /5（Mortality (approx.): ~13–22%, Interpretation: High risk — consider higher level of care.）