• Ilda Amirian, Lærke T Andersen, Jacob Rosenberg, and Ismail Gögenur.
• Department of Surgery, Herlev Hospital, University of Copenhagen, Herlev, Denmark. Electronic address: iamirian@gmail.com.
• J Surg Educ. 2014 Jul 1; 71 (4): 543-50.

ObjectiveTo monitor surgeons' performance and cognition during night shifts.DesignSurgeons were monitored before call and on call (17-hour shift). Psychomotor performance was assessed by laparoscopic simulation and cognition by the d2 test of attention. The surgeons performed the laparoscopic simulation and the d2 test of attention at 8 a.m. before call and at 4 a.m. on call. Sleep was measured by wrist actigraphy and sleepiness by the Karolinska sleepiness scale.SettingDepartment of Surgery at Herlev Hospital, Denmark.ParticipantsOverall, 30 interns, residents, and attending surgeons were included and completed the study. One participant was subsequently excluded owing to myxedema.ResultsThe surgeons slept significantly less on call than before call. There was increasing sleepiness on call; however, no significant differences were found in the precall laparoscopic simulation values compared with on-call values. The d2 test of attention showed significantly improved values on call compared with before call.ConclusionSleep deprivation during a 17-hour night shift did not impair surgeons' psychomotor or cognitive performance.Copyright © 2014 Association of Program Directors in Surgery. Published by Elsevier Inc. All rights reserved.

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