PESI Score Calculator (Pulmonary Embolism Severity)

Pulmonary Embolism Severity Index (PESI) for 30-day mortality risk class after acute PE.

For educational and clinical reference. Not a substitute for medical judgment. See the medical disclaimer.
PESI total
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Risk class
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References

  1. Aujesky D, Obrosky DS, Stone RA, et al. Derivation and validation of a prognostic model for pulmonary embolism. Am J Respir Crit Care Med. 2005;172(8):1041-1046.

How to use

  1. Enter age and sex, then tick each clinical criterion that is present.
  2. The PESI total and risk class (I–V) update instantly.
  3. Class I–II identifies low-risk PE potentially suitable for early discharge.

Frequently asked questions

What is the PESI?

The Pulmonary Embolism Severity Index predicts 30-day mortality after acute PE using age, sex, and 9 clinical variables, classifying patients into 5 risk classes.

How are PESI classes interpreted?

Class I–II is low risk (consider outpatient management); Class III–V indicates progressively higher 30-day mortality.

PESI vs simplified PESI?

The original PESI is more granular (5 classes); sPESI is a dichotomous simplification (0 vs ≥ 1) that is easier to apply with similar performance.

Why is age weighted so heavily?

Age in years is added directly as points, so it dominates the score — older patients reach higher risk classes even with few other findings.

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