The PERC Rule for Pulmonary Embolism Rules out PE if no criteria are present and pre-test probability is ≤15%.
This PERC rule calculator differentiates between patients at low or high risk of pulmonary embolism.
PERC Rule Calculator Check all of the following that are true: Age <50yr Pulse ox >94% (room air) HR <100 No prior PE or DVT No recent surgery or trauma (within prior 4wk, requiring general anesthesia) No hemoptysis No hormonal use (oral contraceptives, hormone replacement, or estrogenic hormone use in male or female patients) No unilateral leg ...
Confused about when to use Wells or PERC for pulmonary embolism? Learn how to apply each tool correctly to reduce unnecessary CT scans without missing a diagnosis.
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Apply the PERC Rule to exclude PE in low-risk patients. For emergency and internal medicine providers.
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The PERC (Pulmonary Embolism Rule-out Criteria) rule can be used in the initial evaluation for pulmonary embolism (PE) in low-risk patients to exclude the diagnosis of PE based on historical and physical examination data alone.
Following this princeps study, several other studies assessed the safety of a PERC-based policy to exclude PE in low-risk emergency patients with a PERC-negative rule. Two meta-analyses [17, 27] confirmed the benefits and safety of the PERC rule, with a rate of PE after follow-up lower than 1 % in PERC-negative patients.