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Surgery

Original POSSUM Predicted Mortality calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Age
Cardiac signs
Respiratory signs
Systolic blood pressure
Pulse
Glasgow Coma Scale
Hemoglobin
White blood cell count
Serum urea
Serum sodium
Serum potassium
Electrocardiogram
Operative severity

Use findings at the time of surgery. Procedure examples are severity guidance; for an unlisted procedure choose the closest severity. Original POSSUM was developed for inpatient general surgical audit, is not the Portsmouth modification, and is not trauma-specific.

Number of procedures
Total blood loss
Peritoneal soiling
Presence of malignancy
Mode of surgery

Result

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Clinical inputs

  • Age
  • Cardiac signs
  • Respiratory signs
  • Systolic blood pressure
  • Pulse
  • Glasgow Coma Scale
  • Hemoglobin
  • White blood cell count
  • Serum urea
  • Serum sodium
  • Serum potassium
  • Electrocardiogram
  • Operative severity
  • Number of procedures
  • Total blood loss
  • Peritoneal soiling
  • Presence of malignancy
  • Mode of surgery

Primary source

Copeland GP et al. POSSUM: a scoring system for surgical audit. Br J Surg. DOI: 10.1002/bjs.1800780327. PMID: 2021856 (1991)

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