Sleep Quality Management in Intensive Care Units

In intensive care units (ICUs), patients frequently experience profoundly disrupted sleep owing to environmental stressors such as excessive noise, suboptimal lighting and frequent clinical interventions. Critical illness itself, along with continuous monitoring and therapeutic procedures, fragments sleep into numerous brief episodes, predominantly comprising light sleep stages and offering scant deep (N3) or rapid eye movement (REM) sleep. This disturbance contributes to cognitive impairment, heightened delirium risk, prolonged mechanical ventilation and slower overall recovery. Effective sleep quality management in ICUs therefore demands a multifaceted strategy: environmental optimisation through noise reduction programmes and dynamic lighting control; scheduling of care activities to minimise nocturnal interruptions; deployment of non-pharmacological measures such as earplugs, eye masks and soothing auditory stimuli; architectural design modifications that foster a more restorative atmosphere; and judicious pharmacological interventions to support circadian realignment. Advances in bedside monitoring—including adapted polysomnography protocols and actigraphy—have refined our understanding of sleep patterns in critically ill patients, enabling tailored interventions. On a global scale, incorporating sleep improvement into ICU design and care programmes is increasingly recognised as vital for enhancing patient outcomes and mitigating post-intensive care syndrome.

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Sleep Quality Management in Intensive Care Units publication trend

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Technical terms

Polysomnography: A comprehensive sleep study employing electroencephalography, electrooculography and electromyography to record brain activity, eye movements and muscle tone, regarded as the gold standard for sleep measurement. Sleep architecture: The structured progression through sleep stages—light, deep (N3) and REM—over a sleep episode, serving as an indicator of sleep quality and continuity. Circadian rhythm: The endogenous 24-hour cycle regulating physiological processes, notably the sleep–wake cycle, which can be disrupted by illness and ICU routines. Post-intensive care syndrome: A spectrum of physical, cognitive and psychological impairments persisting after critical illness, often exacerbated by chronic sleep disruption. Sleep fragmentation: The occurrence of frequent brief awakenings during sleep, diminishing overall restorative benefit.

References

1. Creating the ICU of the future: patient-centred design to optimise recovery. Critical Care (2023).
2. The trajectory of sleep after critical illness: a 24-month follow-up study. Annals of Intensive Care (2025).
3. Clinical review: The impact of noise on patients' sleep and the effectiveness of noise reduction strategies in intensive care units. Critical Care (2009).
4. Effects of earplugs and eye masks combined with relaxing music on sleep, melatonin and cortisol levels in ICU patients: a randomized controlled trial. Critical Care (2015).