| Effect of bright light on shift work nurses in hospitals. | |
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MedLine Citation:
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PMID: 20973396 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The aim of this study are to assess, in a hospital setting, the effects of Bright Light (BL) on the rhythms in body temperature, plasma melatonin, plasma cortisol and subjective alertness during shift work. In our experimental design, 34 healthy shift work nurses from a university hospital were exposed to bright light (4500 lux) during two break times (21:15 to 22; 00 and 3:15 to 4:00) for four consecutive weeks. In this survey, the subjects were studied under 24 h of realistic conditions during which their plasma cortisol and plasma melatonin was measured at 3 h intervals. In addition, their body temperatures were measured during and after night shift work. Subjective alertness and fatigue were evaluated with the Karolinska Sleepiness Scale (KSS) and Visual Analog Scale (VOI). It was found that bright light administration significantly suppressed nighttime melatonin levels during night shift, most strongly at 2:00 a.m. A one-way ANOVA, with repeated measurement design, revealed that Bright Light (BL) tended to increase cortisol levels and body temperature and improved alertness significantly during night shift. These results demonstrate that photic stimulation in a hospital setting can have a powerful influence on the adjustment of the circadian system. |
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Authors:
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Z Zamanian; H Kakooei; S M T Ayattollahi; M Dehghani |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Pakistan journal of biological sciences: PJBS Volume: 13 ISSN: 1028-8880 ISO Abbreviation: Pak. J. Biol. Sci. Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-10-25 Completed Date: 2010-11-09 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101247723 Medline TA: Pak J Biol Sci Country: Pakistan |
Other Details:
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Languages: eng Pagination: 431-6 Citation Subset: IM |
Affiliation:
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Department of Occupational Health, College of Health, Shiraz University of Medical Sciences, Shiraz, Iran. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Circadian Rhythm Female Humans Lighting* Male Middle Aged Nursing Staff, Hospital* Work Schedule Tolerance* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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