Surgery calculators

Explore validated-style scores and utilities commonly used in Surgery. Follow links for full references, limitations, and the interactive calculator.

Caprini Score for Venous Thromboembolism (2005)
Perioperative VTE risk stratification score.
Risk Scores · Updated 4/13/2026
CHOLES Score (Duration of Laparoscopic Cholecystectomy)
Predictive score for difficult/prolonged laparoscopic cholecystectomy.
Risk Scores · Updated 4/13/2026
Gupta Postoperative Pneumonia Risk
Postoperative pneumonia risk estimate model.
Risk Scores · Updated 4/13/2026
Gupta Postoperative Respiratory Failure Risk
Postoperative respiratory failure risk estimate model.
Risk Scores · Updated 4/13/2026
Obesity Surgery Mortality Risk Score (OS-MRS)
Bariatric surgery mortality risk stratification using OS-MRS.
Risk Scores · Updated 4/13/2026
Pancreatic Fistula Risk Score
Risk of clinically relevant pancreatic fistula after surgery.
Risk Scores · Updated 4/13/2026
POSSUM Operative Morbidity and Mortality Risk
Operative morbidity and mortality prediction using POSSUM.
Risk Scores · Updated 4/13/2026

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