[There is a need for further studies exploring the sleep in patients during intensive care unit admission].

Sleep deprivation and fragmentation are common in intensive care unit (ICU) patients.

• Polysomnography studies indicate significant disruptions in sleep among ICU patients.
• Delirium often occurs alongside sleep deprivation and exhibits overlapping symptoms.
• Mechanically ventilated patients typically receive sedation, which complicates accurate sleep assessments.
• Further studies are needed to investigate the connections between circadian rhythm disturbances, sleep disorders, delirium, and sedation in ICU settings.

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