Objective To investigate the therapeutic effect of a modified operating procedure of palatopharyngoplasty (laPP) for the treatment of obstructive sleep apnea hypopnea syndrome (OSAHS) based on a clinical trial. Methods Included in this study were 47 cases with OSAHS, diagnosed based on the indicators of polysomnography (PSG) and treated by the modified operating procedure of palatopharyngoplasty. Then, all these cases were followed up for more than 6 months to evaluate their therapeutic effect with the therapy. Results This kind of modifi...