Sleep Quality in ICU Subjects Receiving Noninvasive Respiratory Support: A Prospective Observational Study.

Area of Science:

• Critical care medicine
• Sleep science
• Respiratory therapy

Background:

• Sleep deprivation is prevalent in intensive care units (ICUs) due to critical illness and environmental factors.
• Sleep quality in patients requiring noninvasive respiratory support is not well understood.

Purpose of the Study:

• To evaluate sleep quantity and quality in ICU patients receiving noninvasive ventilation (NIV) or high-flow nasal cannula (HFNC).

Main Methods:

• Prospective observational study in a teaching hospital ICU.
• Enrolled 72 patients on NIV or HFNC who could tolerate polysomnography (PSG).
• Sleep was assessed overnight using standard PSG.

Main Results:

• Patients on noninvasive respiratory support had significantly shorter total sleep time, lower sleep efficiency, and increased wake after sleep onset compared to healthy adults.
• Sleep architecture was altered, with higher stage 1 non-REM sleep, lower stage 3 non-REM sleep, lower REM sleep, longer REM latency, and a higher arousal index.
• Patients with clinical improvement showed better sleep quality, characterized by lower stage 1 non-REM sleep and higher REM sleep.

Conclusions:

• Noninvasive respiratory support in the ICU is associated with poor sleep quality, irrespective of the modality (NIV vs. HFNC).
• Clinical improvement in these patients is linked to relatively better sleep quality.