The “Tiny Tips” series aims to provide helpful memory aids for remembering difficult to recall exam material for emergency medicine. You can get all of them compiled in an easy-to-review way by downloading the Tiny Tips deck of Boring Cards. This post outlines a mnemonic to help remember the PERC rule (Pulmonary Embolism Rule-out Criteria). PERC is a useful clinical decision rule to help rule-out pulmonary embolism in patients a clinician’s gestalt suggests …