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Heart and clots · Pulmonary embolism rule-out criteria
PERC rule
Whether a low-risk patient needs any test for PE at all.
TellEach item is a sign of a clot in the lung or a reason to have one. When none are there in a low-risk patient, the test does more harm than good.
0 of 8 present
PERC negative
If your pretest probability was already low, PE is ruled out. No D-dimer needed.
Nothing you enter is saved or sent. US units. Education, not medical advice.