Can dynamic light improve melatonin production and quality of sleep?
Abstract
Hospital lighting may cause disruption in the circadian rhythm, partly due to suppression of melatonin production. This may create sleep difficulties and delirium for ICU patients and health issues such as fatigue, poor sleep quality and chronic diseases for ICU staff. Dynamic RGB coloured light which changes colour and intensity in correlation with the time of day has been installed in a Danish ICU, aiming to create lighting conditions being close to daylight variations and supporting patient and staff rhythms. As the effect of dynamic light on patients may be biased by illness, organ failure, and so forth, the aim was to examine the influence of dynamic light on ICU nurses' melatonin production, quality of sleep, and well-being.
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