Czempik Piotr F, Jarosińska Agnieszka, Machlowska Krystyna, Pluta Michał
Department of Anaesthesiology and Intensive Care, Faculty of Medical Sciences in Katowice, Medical University of Silesia, Katowice, Poland.
Students' Scientific Society, Department of Anaesthesiology and Intensive Care, Faculty of Medical Sciences in Katowice, Medical University of Silesia, Katowice, Poland.
Indian J Crit Care Med. 2020 Jan;24(1):33-37. doi: 10.5005/jp-journals-10071-23323.
Sleep deprivation in the intensive care unit (ICU) has been linked to numerous complications. Light levels might impact the sleep of patients in the ICU. The aim of the study was to measure light levels during sleep-protected time in the ICU and to assess the impact of light intensity on sleep quantity/quality.
This prospective, observational study was conducted in a 10-bed, mixed surgical/medical ICU. For measuring light levels, a commercially available smartphone application was used. The measurements were performed between 23:30 and 06:15 hours at 15-minute intervals. To assess sleep quantity, we used Patient's Sleep Observation Behavioral Tool and to assess sleep quality, we used Richards-Campbell Sleep Scale.
The median number of time points at which patients were asleep was 20 (interquartile range, IQR 14-23) out of 25 (5 hours). The median self-reported quality of sleep (overall score) was 49 (IQR 28-71). The median values for individual questions are: question 1 (sleep depth)-54.0 (IQR 37-78), question 2 (sleep latency)-40.5 (IQR 6-90), question 3 (awakenings)-52.5 (IQR 28-76), question 4 (returning to sleep)-25.5 (IQR 11-78), and question 5 (sleep quality)-67.5 (IQR 5-76). No correlation was found between self-reported sleep quality and time spent asleep ( = 0.36). There was no correlation between average light levels during sleep-protected time and sleep quantity ( = 0.42)/sleep quality ( = 0.13). There was a correlation between average (13 ± 5 lux) light levels before sleep-protected time and sleep quality ( = 0.008).
Mean light levels of 11 ± 9 lux during sleep-protected time have no negative impact on quantity and quality of sleep in intensive care unit patients. Light levels up to 18 lux directly before falling asleep improve patients' self-reported quality of sleep in the ICU.
Finding safe levels of light intensity during sleep-protected time in ICU.
Czempik PF, Jarosińska A, Machlowska K, Pluta M. Impact of Light Intensity on Sleep of Patients in the Intensive Care Unit: A Prospective Observational Study. Indian J Crit Care Med 2020;24(1):33-37.
重症监护病房（ICU）中的睡眠剥夺与多种并发症相关。光照水平可能会影响ICU患者的睡眠。本研究的目的是测量ICU中睡眠保护时段的光照水平，并评估光照强度对睡眠量/睡眠质量的影响。
这项前瞻性观察性研究在一间拥有10张床位的外科/内科混合ICU中进行。为测量光照水平，使用了一款市售的智能手机应用程序。测量在23:30至06:15之间每隔15分钟进行一次。为评估睡眠量，我们使用了患者睡眠观察行为工具；为评估睡眠质量，我们使用了理查兹 - 坎贝尔睡眠量表。
在25个时间点（5小时）中，患者入睡的时间点中位数为20个（四分位间距，IQR 14 - 23）。自我报告的睡眠质量（总分）中位数为49（IQR 28 - 71）。各个问题的中位数分别为：问题1（睡眠深度） - 54.0（IQR 37 - 78），问题2（入睡潜伏期） - 40.5（IQR 6 - 90），问题3（觉醒次数） - 52.5（IQR 28 - 76），问题4（再次入睡） - 25.5（IQR 11 - 78），以及问题5（睡眠质量） - 67.5（IQR 5 - 76）。自我报告的睡眠质量与入睡时间之间未发现相关性（ = 0.36）。睡眠保护时段的平均光照水平与睡眠量（ = 0.42）/睡眠质量（ = 0.13）之间没有相关性。睡眠保护时段之前的平均光照水平（13 ± 5勒克斯）与睡眠质量之间存在相关性（ = 0.00）。
睡眠保护时段平均光照水平为11 ± 9勒克斯对ICU患者的睡眠量和睡眠质量没有负面影响。入睡直前光照水平高达18勒克斯可改善ICU患者自我报告的睡眠质量。
确定ICU中睡眠保护时段的安全光照强度水平。
Czempik PF, Jarosińska A, Machlowska K, Pluta M. 光照强度对重症监护病房患者睡眠的影响：一项前瞻性观察性研究。《印度重症监护医学杂志》2020；24(1):33 - 37。
