🫁 PESI (Pulmonary Embolism Severity Index)
Predict 30-day mortality in acute PE with the original Pulmonary Embolism Severity Index.
PESI (Pulmonary Embolism Severity Index)
Age (years)
Male sex
Cancer
Heart failure
Chronic lung disease
Heart rate ≥ 110
Systolic BP < 100
Respiratory rate ≥ 30
Temperature < 36°C
Altered mental status
SaO₂ < 90%
When to use
Risk-stratify PE and support outpatient vs inpatient decisions.
How it works
Age in years plus points (male 10, cancer 30, HF 10, lung 10, HR ≥110 20, SBP <100 30, RR ≥30 20, temp <36 20, altered mentation 60, SaO₂ <90% 20). Classes I (≤65) to V (>125).
Key points
- Classes I–II are low risk; may allow outpatient care.
- Classes IV–V indicate high mortality.
- sPESI is a simpler binary alternative.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.