PERC Rule for Pulmonary Embolism

Shows the PERC criteria, which can rule out PE if all criteria are present and pre-test probability is ≤15%.

Age < 50?
HR < 100?
O2 Sat on Room Air >94%?
No Prior History of DVT/PE?
No Recent Trauma or Surgery?
No Hemoptysis?
No Exogenous Estrogen?
No Clinical Signs Suggesting DVT?
Patient has none of these
Score points








The NNT : Quick Summaries of Evidence-Based Medicine