BISAP Score

How to use it

1. 1

   All 5 criteria at admission. Advantage over Ranson: no 48h wait needed.

2. 2

   SIRS criteria. Temp <36 or >38°C, HR>90, RR>20, WBC<4 or >12×10⁹ — need ≥2.

3. 3

   Score ≥3. Organ failure in ~20% of patients; HDU/ICU management.

When to use it

ED pancreatitis triage

BISAP faster than Ranson at predicting severe pancreatitis on admission.

ICU threshold

BISAP ≥3 + CT showing necrosis → multidisciplinary pancreatitis team.

CTSI supplement

BISAP 0–1 can avoid CT in most patients — scan if clinical deterioration.