• Jingyi Zhang, Xu Liu, Shiqian Zha, Hao Chen, Qingfeng Zhang, and Ke Hu.
• Department of Respiratory and Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan, China.
• Am. J. Med. 2024 Jun 24.

BackgroundIn certain situations, masks are worn during sleep to prevent respiratory infections. However, the effects of mask wearing on cardiopulmonary function during sleep are unknown. This study aimed to determine whether wearing masks during sleep has an impact on cardiopulmonary function, including in patients with obstructive sleep apnea.MethodsThis was a prospective, randomized crossover-controlled trial. The effects of wearing surgical masks or N95 respirators on cardiopulmonary function were measured in healthy subjects and patients with mild-moderate obstructive sleep apnea. Sleep breathing parameters were monitored during nocturnal sleep using a sleep monitor, and subjective feelings about mask wearing were assessed using a questionnaire.ResultsWearing masks during sleep at night did not significantly impact sleep breathing parameters. Furthermore, there were no significant differences in heart rate, blood oxygenation, and blood pressure before and after wearing masks. However, wearing masks wearing, especially the N95 mask, had an adverse impact on sleep quality, and masks were found to be subjectively uncomfortable.ConclusionWearing masks during sleep at night does not adversely affect cardiopulmonary function but they can be uncomfortable, especially the N95 mask. Thus, in circumstances where wearing N95 masks during nocturnal sleep proves intolerable, we recommend the use of surgical masks as a more comfortable alternative.Copyright © 2024 Elsevier Inc. All rights reserved.

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