ICU sleep of poor quality
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.