The Pulmonary Embolism Rule-out Criteria in Low-risk Patients

A cluster randomized trial of the pulmonary embolism rule-out criteria (PERC) compared to usual care for patients estimated to be at low risk of pulmonary embolus (PE) in EDs showed that PERC was non-inferior to usual care at identifying patients who would be free of symptomatic PE at three months, resulting in less use of healthcare resources.