BUN > 25 mg/dL (8.9 mmol/L) :
Abnormal mental status with a Glasgow coma score < 15 :
Evidence of SIRS :
> 60 years old :
Pleural effusion :

The Bedside Index of Severity in Acute Pancreatitis (BISAP) score is used to predict the mortality in patients with acute pancreatitis.

Formula :

Points are given for each variable.

Explanation of Result :

A score of 0-2 is low mortality of less than 2%.

A score of 3-5 is associated with a higher mortality of more than 15%.

* Please verify all calculations prior to clinical use.


  • Wu BU1, Johannes RS, Sun X, Tabak Y, Conwell DL, Banks PA. The early prediction of mortality in acute pancreatitis: a large population-based study. Gut. 2008 Dec;57(12):1698-703. PMID: 18519429.