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ICU sleep of poor quality

Sleep quality in ICU is fragmented, with patients unable to reach the deep stages necessary for physical and mental restoration, a small US study suggests

Researchers who monitored 16 ICU patients found a decrease in the proportion of deep sleep and an increase in superficial sleep.
Patients spent just 1% of sleep time in deep sleep – REM stages three and four – compared with healthy controls who spent 20% of sleep time in these stages.
Stages three and four are considered to be the restorative phases of sleep, study authors said in the Journal of Trauma: Injury, Infection and Critical Care. ‘Sleep in surgical patients cared for in the ICU is highly abnormal,’ they add.

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