Ranson criteria to predict severity of acute pancreatitis

0 hours
Age	>55
White blood cell count	>16,000/mm3
Blood glucose	>200 mg/dL (11.1 mmol/L)
Lactate dehydrogenase	>350 U/L
Aspartate aminotransferase (AST)	>250 U/L
48 hours
Hematocrit	Fall by ≥10 percent
Blood urea nitrogen	Increase by ≥5 mg/dL (1.8 mmol/L) despite fluids
Serum calcium	<8 mg/dL (2 mmol/L)
pO2	<60 mmHg
Base deficit	>4 MEq/L
Fluid sequestation	>6000 mL

Ranson_criteria_pancreatiti.htm

The presence of 1 to 3 criteria represents mild pancreatitis; the mortality rate rises significantly with four or more criteria.

Adapted from Ranson, JHC, Rifkind, KM, Roses, DF, et al, Surg Gynecol Obstet 1974; 139:69.

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