Sleep, circadian rhythms and outcomes in intensive care unit - Report - MDSpire

Sleep, circadian rhythms and outcomes in intensive care unit

  • By

  • Marie-Anne Melone

  • Brian K. Gehlbach

  • May 29, 2026

  • 0 min

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Impact of Sleep and Circadian Disruptions on Clinical Outcomes in the ICU

Overview

This narrative review highlights the significant impact of sleep and circadian rhythm disruptions on clinical outcomes in critically ill patients. It discusses associations with prolonged mechanical ventilation, delirium, and long-term cognitive impairment following ICU discharge.

Background

Sleep and circadian rhythms are crucial for maintaining physiological homeostasis, influencing various bodily functions. In the ICU, these systems are often disrupted, which can complicate recovery and worsen clinical outcomes. Understanding these disruptions is essential for improving patient care and outcomes in critical illness.

Data Highlights

No specific numerical data or trial data provided in the source material.

Key Findings

  • Disrupted sleep architecture is linked to prolonged mechanical ventilation and weaning failure.
  • Alterations in sleep and circadian rhythms correlate with increased delirium and acute brain dysfunction.
  • Circadian rhythm disruptions are associated with systemic inflammation and adverse prognosis.
  • Sleep disturbances may persist post-ICU discharge, contributing to cognitive impairment and reduced quality of life.
  • Methodological limitations exist in current studies, necessitating further rigorous interventional trials.

Clinical Implications

Healthcare professionals should be aware of the potential impact of sleep and circadian rhythm disruptions on critically ill patients. Addressing these issues may improve recovery and long-term outcomes, highlighting the need for targeted interventions in the ICU setting.

Conclusion

The evidence suggests that sleep and circadian disruptions are clinically relevant factors in critical illness, warranting further investigation into their role as potential therapeutic targets.

Related Resources & Content

  1. Society of Critical Care Medicine, Critical Care Medicine, 2025 -- Executive Summary of a Focused Update to the Clinical Practice Guidelines for the Prevention and Management of Pain, Anxiety, Agitation/Sedation, Delirium, Immobility, and Sleep Disruption in Adult Patients in the ICU
  2. Intensive Care Medicine — Exploring the Relationship Between Night Shifts, Human Factors, and ICU Errors: Is There a Causal Link?
  3. Intensive Care Medicine — Melatonin to prevent delirium in the ICU: revisiting the evidence
  4. Intensive Care Medicine — Influence of Chronotype on Night Shift Fatigue, Sleepiness, and Psychomotor Performance in ICU Nurses
  5. Intensive Care Medicine — Memory, sedation, and recovery in the ICU: what should we do better?
  6. Executive Summary of a Focused Update to the Clinical Practice Guidelines for the Prevention and Management of Pain, Anxiety, Agitation/Sedation, Delirium, Immobility, and Sleep Disruption in Adult Patients in the ICU - PubMed
  7. A systematic meta-review of interventions to prevent and manage delirium in the Intensive Care Unit: Part 1 – Pharmacological interventions | Critical Care | Springer Nature Link
  8. Low-Dose Melatonin for Prevention of Delirium in Critically Ill Patients: A Multicenter, Randomized, Placebo-Controlled Feasibility Trial - PubMed

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