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Author (up) Griepentrog, J.E.; Labiner, H.E.; Gunn, S.R.; Rosengart, M.R. url  doi
  Title Bright environmental light improves the sleepiness of nightshift ICU nurses Type Journal Article
  Year 2018 Publication Critical Care (London, England) Abbreviated Journal Crit Care  
  Volume 22 Issue 1 Pages 295  
  Keywords Circadian; Light; Night shift; Nurse; Shift work sleep disorder  
  Abstract BACKGROUND: Shift work can disturb circadian homeostasis and result in fatigue, excessive sleepiness, and reduced quality of life. Light therapy has been shown to impart positive effects in night shift workers. We sought to determine whether or not prolonged exposure to bright light during a night shift reduces sleepiness and enhances psychomotor performance among ICU nurses.

METHODS: This is a single-center randomized, crossover clinical trial at a surgical trauma ICU. ICU nurses working a night shift were exposed to a 10-h period of high illuminance (1500-2000 lx) white light compared to standard ambient fluorescent lighting of the hospital. They then completed the Stanford Sleepiness Scale and the Psychomotor Vigilance Test. The primary and secondary endpoints were analyzed using the paired t test. A p value <0.05 was considered significant.

RESULTS: A total of 43 matched pairs completed both lighting exposures and were analyzed. When exposed to high illuminance lighting subjects experienced reduced sleepiness scores on the Stanford Sleepiness Scale than when exposed to standard hospital lighting: mean (sem) 2.6 (0.2) vs. 3.0 (0.2), p = 0.03. However, they committed more psychomotor errors: 2.3 (0.2) vs. 1.7 (0.2), p = 0.03.

CONCLUSIONS: A bright lighting environment for ICU nurses working the night shift reduces sleepiness but increases the number of psychomotor errors.

TRIAL REGISTRATION:, NCT03331822 . Retrospectively registered on 6 November 2017.
  Address Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, USA.  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1364-8535 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:30424793 Approved no  
  Call Number GFZ @ kyba @ Serial 2070  
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