increase of the apnoeahypopnoea index after uvulopalatopharyngoplasty analysis of failure from 70 patients who had uvulopalatopharyngoplasty uppp operation and a pre and postoperative sleep registration we could retrospectively determine the failures and the correlation between variables such as age gender body mass index bmi earlier or concomitant tonsillectomy unilevel uvulapalatetonsil or multilevel base of tongue as well obstruction during sleep endoscopy and treatment outcome from 70 patients the preoperative sleep registration classified 15 social unacceptable snorers and 55 obstructive sleep apnoea syndrome osas patients in this study we focused on the osas patients from the 55 osas patients 32 were classified as successful after uppp because they had a decreased apnoeahypopnoea index ahi after surgery 056 as between the level of obstructions p 024 for earlier or concomitant tonsillectomy we found a statistically difference p 0039 but a very small number in the high failure group n 8 we conclude that although sleep endoscopy adds to better patient selection and better results paradoxically the finding of obstruction on palateuvula level during sleep endoscopy can still give uppp failures