Predicts mortality in acute pancreatitis (11 criteria)
Total Score
0–2 criteria: Mild pancreatitis. Predicted mortality < 1%. Conservative management; early oral feeding when tolerated.
Disclaimer: The clinical scoring and algorithms on this platform are intended strictly for professional informational purposes. They do not constitute a definitive medical diagnosis, treatment, or clinical decision. The final judgment and responsibility lie with the treating physician.
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Disclaimer: The clinical scoring and algorithms on this platform are intended strictly for professional informational purposes. They do not constitute a definitive medical diagnosis, treatment, or clinical decision. The final judgment and responsibility lie with the treating physician.
Apply Ranson's Criteria to patients admitted with acute pancreatitis to stratify severity and guide triage decisions. Note that the score can only be fully calculated 48 hours after admission — the 6 parameters at 48 hours are essential to the complete score. Use admission criteria (first 5 items) for early prognostication at presentation. These standard Ranson criteria are validated for alcoholic (non-gallstone) pancreatitis; gallstone pancreatitis uses a modified set with different thresholds (Age > 70, WBC > 18,000, Glucose > 220 mg/dL, LDH > 400 IU/L, with different 48-hour criteria).
For early (< 24h) severity stratification when 48-hour Ranson data is unavailable, the BISAP score (5 items, all obtainable within the first 24 hours) offers comparable predictive accuracy with a much faster turnaround. The two scores are complementary: use BISAP for initial triage and ICU vs. ward decision on admission; complete Ranson's at 48 hours to reassess severity trajectory and resource needs. A patient with a BISAP of 1 who develops a rising Ranson score to 4 at 48 hours should be managed as moderate-to-severe disease.
Ranson's score has two major limitations that must be understood: (1) It takes 48 hours to complete, making it useless for immediate triage at presentation. (2) It cannot be updated — once calculated, it is a snapshot of that 48-hour window and does not reflect subsequent improvement or deterioration. For ongoing severity monitoring during ICU admission, use serial SOFA scores or the modified CT Severity Index (CTSI/Balthazar score) on contrast-enhanced CT, which remains the gold standard for detecting local complications (pancreatic necrosis, abscess, pseudocyst).
Ranson JH, Rifkind KM, Roses DF, Fink SD, Eng K, Spencer FC.. Prognostic signs and the role of operative management in acute pancreatitis. Surgery, Gynecology & Obstetrics. 1974;139:69–81.