Article Citation: Kline JA, et al. “Prospective multicenter evaluation of the pulmonary embolism rule-out criteria”. J Thromb Haemost. 2008. 6(5):772-780. What we already know about the topic: PERC (Pulmonary Embolism Rule-out Criteria): Age > = 50 years, Pulse >= 100, SpO2 <= 95% on RA, Unilateral leg swelling, Hemoptysis, Surgery or trauma < = 4 weeksRead more