Sleep in the intensive care unit

Margaret A. Pisani, Randall S. Friese, Brian K. Gehlbach, Richard J. Schwab, Gerald L. Weinhouse, Shirley F. Jones

Research output: Contribution to journalReview articlepeer-review

266 Scopus citations


Sleep is an important physiologic process, and lack of sleep is associated with a host of adverse outcomes. Basic and clinical research has documented the important role circadian rhythm plays in biologic function. Critical illness is a time of extreme vulnerability for patients, and the important role sleep may play in recovery for intensive care unit (ICU) patients is just beginning to be explored. This concise clinical review focuses on the current state of research examining sleep in critical illness. We discuss sleep and circadian rhythm abnormalities that occur in ICU patients and the challenges to measuring alterations in circadian rhythm in critical illness and review methods to measure sleep in the ICU, including polysomnography, actigraphy, and questionnaires. We discuss data on the impact of potentially modifiable disruptors to patient sleep, such as noise, light, and patient care activities, and report on potential methods to improve sleep in the setting of critical illness. Finally, we review the latest literature on sleep disturbances that persist or develop after critical illness.

Original languageEnglish (US)
Pages (from-to)731-738
Number of pages8
JournalAmerican journal of respiratory and critical care medicine
Issue number7
StatePublished - Apr 1 2015


  • Circadian rhythm
  • Critical illness
  • Polysomnography
  • Sleep disruption

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine
  • Critical Care and Intensive Care Medicine


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