BISAP Score (Pancreatitis Severity) — Free Online Calculator
BISAP Criteria
BISAP Score
0
< 1% mortality risk
About This Calculator
The BISAP (Bedside Index for Severity in Acute Pancreatitis) score is a prognostic scoring system that predicts mortality in acute pancreatitis. It uses five simple parameters available within the first 24 hours of admission. BISAP is simpler than APACHE II and Ranson's criteria, requiring no complex physiological data, and can be calculated at the bedside using routine clinical information.
Formula
Interpretation
| BISAP Score | Mortality Risk |
|---|---|
| 0 | < 1% |
| 1 | < 2% |
| 2 | ~2% |
| 3 | 5–8% |
| 4 | 10–20% |
| 5 | > 25% |
References
- Wu BU, et al. The early prediction of mortality in acute pancreatitis: a large population-based study. Gut. 2008;57(12):1698-1703.
- Papachristou GI, et al. Comparison of BISAP, Ranson's, APACHE-II, and CTSI scores in predicting organ failure, complications, and mortality in acute pancreatitis. Am J Gastroenterol. 2010;105(2):435-441.
Frequently Asked Questions
When should the BISAP score be calculated?
BISAP should be calculated within the first 24 hours of hospital admission using data available at presentation. It is designed for early risk stratification, unlike Ranson's criteria which require 48 hours for complete assessment.
How does BISAP compare to Ranson's criteria and APACHE II?
BISAP is simpler (5 variables vs. 11 for Ranson's and 14+ for APACHE II) and can be calculated immediately on admission. Studies show comparable prognostic accuracy. BISAP is particularly useful for identifying low-risk patients who may be candidates for early discharge.
What does the 'S' in BISAP stand for and how is it determined?
The 'S' stands for SIRS (≥ 2 criteria). To assess this component, check: Temperature >38°C or <36°C, Heart rate >90 bpm, Respiratory rate >20/min or PaCO2 <32 mmHg, and WBC >12,000 or <4,000 or >10% bands. If ≥ 2 are present, score 1 point for BISAP.
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⚠ Medical Disclaimer
This tool is for educational and informational purposes only. It is not intended to replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional for clinical decisions.