Emergency Medicine

PESI (PE Severity Index)

30-day mortality risk in pulmonary embolism.

Education and reference only. Not a substitute for clinical judgement, local policy or product labelling. Always verify before clinical use. Values are calculated in your browser and never stored.

When to use

Use in confirmed PE to estimate 30-day mortality and help identify low-risk patients suitable for outpatient management.

Why use

It supports safe early discharge decisions in low-risk PE.

Advice

Classes I–II (≤85 points) are low risk and may be suitable for outpatient treatment with appropriate support. Use with clinical judgement and local pathways.

Evidence & references

  1. Aujesky D et al. Derivation and validation of a prognostic model for pulmonary embolism. Am J Respir Crit Care Med. 2005.

Related calculators

Wells Score for PEPre-test probability of pulmonary embolism.PERC RuleRules out PE in low-risk patients when all criteria are absent.

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