Tools & calculators

PERC rule

Pulmonary embolism rule-out criteria for low-risk patients.

Last reviewed 2026-01-06|vte | pe | triage

Inputs

Age

years

Heart rate

bpm

Oxygen saturation

Unilateral leg swelling

Hemoptysis

Estrogen use

Recent surgery or trauma (<=4 weeks)

Prior DVT or PE

Enter values to see the result.

References