This rule is a screening tool with high sensitivity, but low specificity. In other words, a patient meeting all of the PERC criteria has a very low likelihood of having a PE, but a person failing
Check all of the following that are true: In patients with low suspicion for PE (best-guess pre-test probability <15%) AND all are true, only 0.9% had PE (n=7527) and it can be ruled-out without
Always double CHECK inputs and computer-generated outputs, data processing and original sources manually. Normal values presented here are only a general guide. It is essential to
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For patients who are at low risk for acute PE, use the Pulmonary Embolism Rule-out Criteria (PERC) to exclude the diagnosis without further diagnostic testing.
Although this study was not reported as a management study and indeed the study documented that clinicians often fail to document all the components of the PERC rule in the medical
If the patient is considered low risk, the PERC Rule may help avoid further testing. If the patient is moder-ate or high risk, then PERC Rule cannot be utilized.
To enable clinicians to confidently rule out PE while reducing the number of unnecessary CTPAs, several clinical rules have been developed and validated.
The PERC Rule for Pulmonary Embolism Rules out PE if no criteria are present and pre-test probability is ≤15%.
We found that PERC rule is highly effective in ruling out the PE in settings of low clinical suspicion and D-dimer testing is therefore unnecessary when the pretest probability is low.
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