Mannheim Peritonitis Index
Mannheim Peritonitis Index (Wacha H, Linder MM, et al. 1987): weighted intraoperative factors (age, sex, organ failure, malignancy, duration, origin, spread, exudate) summed to 0-47, where > 26 marks high mortality risk.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Age > 50 years
- Yes
- Female sex
- Yes
- Organ failure
- Yes
- Diffuse generalized peritonitis
- Yes
- Exudate
- 6
Result: Mannheim Peritonitis Index 29 — high mortality risk (>= 26).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- < 26
- Lower mortality risk.
- >= 26
- High mortality risk (weighted intraoperative factors, 0-47; < 21 ~low, 21-29 intermediate, >= 30 high). A prognostic index, not a diagnosis.
What you enter
- Age > 50 years (5)
- Female sex (5)
- Organ failure (7)
- Malignancy (4)
- Preoperative duration > 24 h (4)
- Origin of sepsis not colonic (4)
- Diffuse generalized peritonitis (6)
- Exudate (clear 0 / cloudy-purulent 6 / fecal 12)
How this is calculated
Linder MM, Wacha H, Feldmann U, Wesch G, Streifensand RA, Gundlach E. The Mannheim peritonitis index. An instrument for the intraoperative prognosis of peritonitis. Chirurg. 1987;58(2):84-92. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.