LAUSR

Background The frequency of postoperative complications is used as an indicator of surgical quality; however, comparison of outcomes is hampered by a lack of agreement on the definition of complications and their severity. A standard grading system for surgical complications is necessary to improve the quality of clinical research and reporting in head and neck reconstruction. Methods The aim of this study was to compare postoperative morbidity after microvascular head and neck reconstruction between patients with versus without a history of prior radiation therapy (RT) by using the Clavien–Dindo classification. A group of 274 patients was divided into two cohorts based on the history of prior RT: the RT group included 79 patients and the non-RT group included 195 patients. Postoperative (30-day) complications were compared between the groups with a nonstandardized evaluation system and the Clavien–Dindo classification. Results The grades of complications according to the Clavien–Dindo classification were significantly higher in the RT group than in the non-RT group. The frequency of postoperative complications did not differ significantly between the groups according to the nonstandardized evaluation system. Conclusions The Clavien–Dindo classification could serve as a useful, highly objective tool for grading operative morbidity after microvascular head and neck reconstruction when comparing similar defects and methods of reconstruction. Widespread use of the Clavien–Dindo classification system would allow adequate comparisons of surgical outcomes among different surgeons, centers, and therapies.