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Purpose: This systematic review aims to compare the efficacy and safety of multilevel and single level surgery, including barbed pharyngoplasties, in the treatment of obstructive sleep apnea (OSA)., Methods: The study followed PRISMA guidelines and searched PubMed/MEDLINE, Google Scholar, and Ovid databases for studies evaluating the effect of barbed pharyngoplasties on adults with OSA. Prospective and retrospective cohort studies were included with pre- and post-treatment comparisons of sleep tests and self-reported clinical outcomes. Exclusion criteria were non-English studies, case reports, reviews, conference abstracts, letters, and pediatric studies. Successful surgery was classified using Sher's criteria., Results: The study selected a total of 1014 patients from 26 studies, 24 of which were longitudinal studies with 10 retrospective trials and 14 prospective studies. The average age of the patients was 46.9 years, with an average Body Mass Index (BMI) of 25.6 kg/m 2 . Most of the patients were male (84.6%). The study included only palatal surgical techniques with barbed sutures, and patients who underwent cardio-respiratory monitoring and Drug Induced Sleep Endoscopy (DISE) before surgery. Mean Apnea Hypopnea Index (AHI) preoperative was 32.9/h, AHI postoperative was 11.9/h, and mean reduction of AHI was 62.3%. The most commonly adopted palatoplasty was Barbed Repositioning Pharyngoplasty (BRP) in 16 out of 26 studies, followed by its subsequent modifications in 3 studies., Conclusions: Barbed pharyngoplasties appear to be effective both on objective measurement and subjective scores. DISE represents a fundamental tool to assess uni-level or multilevel obstruction. When retro-palatal collapse is present, barbed pharyngoplasty appears to be effective. Barbed pharyngoplasties maintain their good results both in single level or multilevel surgery. Randomized clinical controlled trials with multi-center cooperation and long-term study are necessary., (© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)