Classic 11-point severity scoring for acute pancreatitis — 5 admission criteria plus 6 criteria at 48 hours
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Clinical background · Scoring criteria · Evidence-based pearls
Ranson's Criteria were developed by Dr. John Ranson at New York University in 1974 from a retrospective analysis of 100 patients with acute pancreatitis. The original 11-criteria system (5 measured at admission + 6 at 48 hours) was specifically validated for pancreatitis from any aetiology, with separate criteria for alcoholic pancreatitis. For 50 years, Ranson's Criteria remained the most widely taught and used severity assessment tool in acute pancreatitis — though its 48-hour completion requirement and complexity have led to its gradual replacement by BISAP, APACHE-II, and CT severity index in contemporary practice.
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