ObjectiveTo evaluate the therapeutic effectof combined radiofrequency tongue base reduction (RTBR) and uvulopalatopharyngoplasty (UPPP) for the treatment of type II obstructive sleep apneahypopnea syndrome (OSAHS).MethodsClinical data of 164 patients suffering from OSAHS surgically treated in our department from Jan. 2012 to May 2017 were analyzed retrospectively. The diagnosis was confirmed by polysomnography (PSG), and the obstructive plane was determined by Apneagraph 200(AG200) and computed tomography (CT) of upper airway. All patients underwent UPPP with RFBT. Postoperative PSG was adopted to assess the treatment outcome.Results137 cases were followed up.The followup period ranged from 2 to 66 months with an average of (13.37±11.95). Of the 137 cases, the cure rate was 14.6%(20/137), significant effective rate was 23.36%(32/137), and the effective rate was 30.66%(42/137) respectively, with an overall effective rate of 68.61%(94/137).ConclusionsCombination of RTBR and UPPP is effective for the treatment of OSAHS. The therapeutic effect maybe underestimated in our study due to relatively low followup rate.