Methods
tonsillar hypertrophy.or recurrent tonsillitis, peritonsillitis, hemorrhage
PERITONSILLAR ABSCESS, SYSTEMIC DISEASE, ACUTE TONSILLITIS, PERITONSILLITIS, IMMUNODEFICIENCY SYNDROME, HEMORRHAGE, BLEEDING DISORDER
Adult patients who underwent tonsillectomy due to tonsillar hypertrophy.or recurrent tonsillitis in the Department of Otorhinolaryngology-Head and Neck Surgery between April 2012 to September 2020 were recruited. The exclusion criteria were acute tonsillitis within 2 weeks, peritonsillitis or peritonsillar abscess, bleeding disorder, immunodeficiency syndrome, and systemic disease. A sample size calculation was performed using Power Analysis and Sample Size software (version 11.0). Our previous hemorrhage rate of two techniques are used to calculate the sample size, for an alpha level of 0.025, a desired type II error rate of 0.1, and power of 0.9. The total calculated sample size was 613. Therefore, 620 subjects were enrolled, affording adequate power in this study. Group allocation was performed by the principal investigator and a registered operating room nurse using simple random sampling. Specifically, consecutive subjects who met the inclusion criteria and signed the consent form were assigned random numbers generated by the SPSS for Windows software package (ver.18.0; SPSS, Inc., Chicago, IL, USA), which allocated them to either coblation or modified modified monopolar tonsillectomy group.All surgeries were performed by the senior author, who has more than 20 years of experience with tonsillectomy and 5 years of coblation. However, principal investigator didn’t perform the surgery for patients.