Comparison of labetalol and lidocaine in induction of controlled hypotension in tympanoplasty: a randomized clinical trial.

"Conflicts of interest The authors declare no conflicts of interest."

"This double-blind clinical trial was conducted between March 2019 and November 2020. The study protocol received ethical approval from the ethics committee of Shiraz University of Medical Sciences, Shiraz, Iran (ID: IR.SUMS.MED.REC.1397.391). Additionally, the trial was registered with the Iranian Registry of Clinical Trials in the WHO registry network on March 1, 2019 (trial ID: IRCT20180922041084N3). The study included 64 patients, aged 18–60 years, classified as ASA (American Society of Anesthesiologists) I and II, who were selected from Khalili and Dastgheib Hospitals in Shiraz, Iran. All participants provided written informed consent, and the study was conducted in accordance with the Helsinki Declaration-2013 and CONSORT guidelines."