EBQ:PERC Rule Validation
Can risk stratification to low risk for pulmonary embolism (PE) in combination with a negative Pulmonary Embolism Rule Out Criteria (PERC) score reduce the probability of PE to less than 2%?
The combination of gestalt estimate of low suspicion for PE and PERC(-) reduces the probability of VTE to below 2% in about 20% of outpatients with suspected PE.
This was a prospective, non-interventional, multicenter study of patients presenting to the emergency department (ED) in 12 hospitals in the USA and one in Christchurch, New Zealand. Investigators were trained in applying the PERC Rule
- Is the patient older than 49 years of age?
- Is the pulse rate above 99 beats min)1?
- Is the pulse oximetry reading <95% while the patient breathes room air?
- Is there a present history of hemoptysis?
- Is the patient taking exogenous estrogen?
- Does the patient have a prior diagnosis of venous thromboembolism (VTE)?
- Has the patient had recent surgery or trauma? (Requiring endotracheal intubation or hospitalization in the previous 4 weeks.)
- Does the patient have unilateral leg swelling? (Visual observation of asymmetry of the calves.)
- ACEP clinical policy; Ann Emerg Med 2011; 57:628-650.