Ranson Criteria Calculator

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Ranson's Criteria

Clinical Decision Tool

Calculates Ranson criteria for severity assessment in non-gallstone acute pancreatitis.

Age >55 years

No 0 Yes (+1) +1

WBC >16 ×10⁹/L

No 0 Yes (+1) +1

Glucose >11.1 mmol/L (>200 mg/dL)

No 0 Yes (+1) +1

LDH >350 IU/L

No 0 Yes (+1) +1

AST >250 IU/L

No 0 Yes (+1) +1

Haematocrit fall >10 percentage points by 48 h

No 0 Yes (+1) +1

BUN rise >1.8 mmol/L (>5 mg/dL) by 48 h despite fluids

No 0 Yes (+1) +1

Serum calcium <2.0 mmol/L (<8 mg/dL)

No 0 Yes (+1) +1

PaO₂ <60 mmHg

No 0 Yes (+1) +1

Base deficit >4 mEq/L

No 0 Yes (+1) +1

Estimated fluid sequestration >6 L

No 0 Yes (+1) +1

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