PERC rule calculator: Difference between revisions
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{{PERC Calculator}} | {{PERC Calculator}} | ||
==References== | |||
<references/> | |||
[[Category:Pulmonary]] | |||
[[Category:Medical calculators]] | [[Category:Medical calculators]] | ||
[[Category:Pages using gadget Calculator]] | [[Category:Pages using gadget Calculator]] | ||
Latest revision as of 09:28, 22 March 2026
PERC Rule
| Criteria | No (0) | Yes (+1) |
|---|---|---|
| Age ≥50 years | 1 | |
| Heart rate ≥100 bpm | 1 | |
| SpO₂ <95% on room air | 1 | |
| Unilateral leg swelling | 1 | |
| Hemoptysis | 1 | |
| Recent surgery or trauma (within 4 weeks requiring hospitalization) | 1 | |
| Prior PE or DVT | 1 | |
| Hormone use (oral contraceptives, HRT, or estrogenic hormones) | 1 | |
| Positive Criteria | / 8 | |
| Score = 0 | PERC Negative — If pre-test probability is ≤15%, PE is effectively ruled out. No further workup needed (sensitivity 97.4%, NPV 99.5%). |
|---|---|
| Score ≥ 1 | PERC Positive — Cannot rule out PE by PERC alone. Consider D-dimer, Wells' score, or CTA based on clinical suspicion. |