EpistemisPERC Pulmonary Embolism Exclusion Rule
Eight criteria that, all negative and only in the patient with low clinical probability, allow pulmonary embolism to be ruled out without requesting a D-dimer. A single positive criterion invalidates the rule: then we must continue studying.
Required inputs
| Variable | Example value |
|---|---|
| Previous clinical probability of pulmonary embolism | — |
| Age 50 years or older | — |
| Heart rate of 100 bpm or more | — |
| Oxygen saturation less than 95% with ambient air | — |
| Hemoptysis | — |
| Estrogen treatment | — |
| Previous deep vein thrombosis or pulmonary embolism | — |
| Surgery or trauma with hospitalization in the last 4 weeks | — |
| Unilateral edema of one leg | — |
Run the calculation in the app
This page explains the score but does not run it. In Epistemis, the calculator validates units, flags values outside physiological ranges, and provides the interpretation that a number alone cannot convey.
Epistemis is educational review material. It is not a medical device, does not diagnose or prescribe treatment, and does not replace formal medical training, current clinical guidelines, or professional clinical judgment.
- Specialty
- Pneumology and Respiratory
- Area
- Internal Medicine
- Variables
- 9