Ranson's criteria for non-gallstone acute pancreatitis (the gallstone version uses different thresholds).
Ranson 1974 thresholds apply to non-gallstone pancreatitis only (gallstone: age >70, WBC >18,000, glucose >220, LDH >400, AST >250; 48 h: Hct fall >10%, BUN rise >2, Ca <8, base deficit >5, sequestration >4 L). The full score needs both admission and 48-hour data. Mortality figures come from 1970s cohorts and overestimate current outcomes; prefer BISAP/APACHE II or clinical judgment.
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