Effect of Dexmedetomidine on Posttraumatic Stress Disorder in Patients Undergoing Emergency Trauma Surgery: A Randomized Clinical Trial 1. Intraoperative and postoperative dexmedetomidine significantly decreased the incidence of post-traumatic stress disorder (PTSD) in patients with trauma undergoing emergency surgery. Evidence Rating Level: 1 (Excellent) The incidence of PTSD after trauma hospitalization is reported to be as