Sleep quality and associated factors in conscious patients hospitalized in the Intensive Care Unit
DOI:
https://doi.org/10.63688/1s48n341Keywords:
sleep quality, intensive care units, critical care, adult, nursing careAbstract
Sleep quality in conscious patients hospitalized in intensive care units (ICUs) is affected by multiple factors; therefore, it is necessary to improve rest and promote an optimal environment during hospitalization. Objective: To analyze the available scientific evidence regarding sleep quality and associated factors in conscious adult patients hospitalized in intensive care units. Methodology: A systematic literature review with a narrative synthesis approach was conducted following the PRISMA 2020 guidelines. The search was carried out in the PubMed and SciELO databases during the 2021–2026 period. Original studies related to sleep quality and associated factors in adult ICU patients were included. Results: The included studies showed that sleep disturbances in critically ill patients are mainly associated with environmental factors such as noise, artificial lighting, and nighttime healthcare activities, as well as clinical and psychological factors including pain, anxiety, disease severity, mechanical ventilation, and invasive devices. Furthermore, sleep disturbances were associated with delirium and neurocognitive alterations. Non-pharmacological interventions, particularly noise reduction, light control, and reorganization of nighttime care, demonstrated favorable results in improving rest. Conclusions: Sleep quality in ICU patients is affected by multiple environmental, clinical, psychological, and healthcare-related factors that interact during hospitalization. Non-pharmacological interventions and nursing care play an important role in promoting rest and supporting comprehensive critical patient care.
References
Brancato, D., Mer, M., & Jooma, Z. (2025). Noise levels in intensive care units at Charlotte Maxeke Johannesburg Academic Hospital. Southern African Journal of Critical Care. https://doi.org/10.7196/SAJCC.2025.v41i3.3169
Carrera, M. P., Alegría, L., Brockmann, P., García, P., Henríquez-Beltrán, M., & Bakker, J. (2024). Nonpharmacological interventions to promote sleep in the adult critical patients unit: A scoping review. Australian Critical Care. https://doi.org/10.1016/j.aucc.2024.03.010
Darby, A., Northam, K., Austin, C. A., Chang, L., & Campbell-Bright, S. (2021). Development and implementation of a multicomponent protocol to promote sleep and reduce delirium in a medical intensive care unit. Annals of Pharmacotherapy. https://doi.org/10.1177/10600280211038168
Erbay Dalli, Ö., & Kelebek Girgin, N. (2025). Sleep quality and disruptive factors in intensive care units: A comparison between mechanically ventilated and spontaneously breathing patients. Nursing in Critical Care. Recuperado de https://pmc.ncbi.nlm.nih.gov/articles/PMC12162166/
Gao, C., Wang, A., Wang, Y., He, Y., Xu, M., & Wang, Q. (2025). Survey of perceived sleep quality and nursing implications in 172 adult ICU patients. European Journal of Medical Research. https://doi.org/10.1186/s40001-025-03017-0
Jonescu, E. E., Litton, E., & Farrell, B. (2025). Investigating the interplay of thermal, lighting, and acoustics in intensive care for enhanced patient well-being and clinical outcomes. HERD: Health Environments Research & Design Journal. https://doi.org/10.1177/19375867251317235
Kang, J., Cho, H., Kim, S., & Jeong, J.-H. (2026). Sleep quality and delirium occurrence in intensive care unit patients: A prospective observational study. Nursing in Critical Care. https://doi.org/10.1111/nicc.70435
Liu, C., Ji, X., Lu, J., Zhong, L., Hu, J., Wang, Y., Zhou, Q., & Xie, B. (2024). Assessment of sleep quality using cardiopulmonary coupling and its predictive value for delirium in ICU patients. Sleep Medicine. https://doi.org/10.1016/j.sleep.2024.05.056
Liu, C., Ji, X., Lu, J., Zhong, L., Hu, J., Wang, Y., Zhou,Q., & Xie, B. (2024). Assessment of sleep quality using cardiopulmonary coupling and its predictive value for delirium in ICU patients. Sleep Medicine. https://doi.org/10.1016/j.sleep.2024.12.020
Lkoul, A., Oumbarek, K., Bouchriti, Y., Jniene, A., & Dendane, T. (2024). Environmental factors affecting sleep quality in intensive care unit patients in Southern Morocco: An assessment study. Advances in Respiratory Medicine. Recuperado de https://pmc.ncbi.nlm.nih.gov/articles/PMC12189919/
Matsuura, Y., Ohno, Y., Natori, H., Ichikawa, A., Nakamura, M., Akiyama, R., & Ueno, T. (2025). Electroencephalography-based evaluation of the impact of night-time nursing care on sleep during intensive care unit administration after cardiac surgery. Journal of Intensive Care. https://doi.org/10.1186/s40560-025-00789-0
Soares, P. H., & Serafim, R. B. (2024). Delirium and sleep quality in the intensive care unit: The role of melatonin. Critical Care Science. https://doi.org/10.62675/2965-2774.20240083-en
Tonna, J. E., Dalton, A., Presson, A. P., Zhang, C., Colantuoni, E., Lander, K., et al. (2021). The effect of a quality improvement intervention on sleep and delirium in critically ill patients in a surgical ICU. Chest. https://doi.org/10.1016/j.chest.2021.03.030
Yang, J., & Zhou, J. (2024). Effect of the levels and sources of noise on the sleep quality of conscious patients in emergency intensive care unit. Noise & Health. https://doi.org/10.4103/nah.nah_83_24
Zhang, Y., Yang, Y., Cheng, C., Hou, G., Ding, X., & Ma, J. (2024). Evidence-based intervention study to improve sleep quality in awake adult ICU patients: A prospective, single-blind, clustered controlled trial. Critical Care. https://doi.org/10.1186/s13054-024-05161-1
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Copyright (c) 2026 Jessica Pamela Correa Quito, Adriana Jazmín Echaiz Del Pezo, Diego Andrés Cabezas López (Autor/a)

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