Effects of short-term preoperative intranasal dexmedetomidine plus conventional treatment on delirium following cardiac surgery in patients with sleep disorders.

"Conflict of interest statement The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. Declarations Ethics approval and consent to participateThis study adhered to the “Declaration of Helsinki” as established by the World Medical Congress and was approved by the Chinese Ethics Committee of Registering Clinical Trials (approval number: ChiECRCT20210592). This study was also approved by the Ethics Committee of the First Hospital of the University of Science and Technology of China. All patients provided informed consent before participating in the study. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This research was self-financed and did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors."

"Trial registration URL: www.chictr.org.cn with registration number ChiCTR 2100043968, registered on 06/03/2021."