• Elisa Mattiussi, Matteo Danielis, Lucia Venuti, Marta Vidoni, and Alvisa Palese.
• Department of Medical Sciences, Udine University, Italy.
• Intensive Crit Care Nurs. 2019 Aug 1; 53: 43-53.

ObjectivesTo summarise evidence on sleep deprivation and/or poor sleep determinants as experienced by intensive care unit patients.Research Methodology/DesignA systematic review of qualitative studies identified through PubMed, CINAHL and Scopus databases published in English up to 2018 was performed following PRISMA guidelines. The included studies were critically evaluated by using the Critical Appraisal Screening Programme tool. Study findings were then subjected to a meta-summary and a meta-synthesis.SettingIntensive Care Units.Main Outcome MeasuresCritically ill patients' experiences of sleep deprivation.ResultsSeven qualitative studies were included documenting the experience of 109 adult patients. A total of 12 codes emerged as causes of sleep deprivation and 'feeling fear/concern' was reported with the greatest frequency (71.4%) in the meta-summary. The 12 codes were categorised into three main themes influencing both directly and also interdependently the quality of sleep: (1) Experiencing complex interactions with the environment (nursing activities, frightening or disturbing sounds, acceptable sounds, time and space disorientation); (2) Undergoing intensive emotions and feelings (fear/concerns, state of abandon, inexplicable insomnia, inability to move, inability to talk) and (3) Receiving an appropriate standard of care (physical pain, feeling safe/unsafe).ConclusionsDespite the increased relevance of sleep deprivation and poor sleep quality, only a few studies have been performed to date aimed at identifying the factors involved in the phenomenon according to patient experience. The majority of determinants as identified from patients' perspective are modifiable.Copyright © 2019 Elsevier Ltd. All rights reserved.

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