Abstract:ObjectiveTo study the application value of acoustic reflection technique in children with obstructive sleep apnea hypopnea syndrome (OSAHS).MethodsEndoscopic plasmaassisted bilateral tonsillectomy and adenoidectomy were applied to 61 children suffering from OSAHS.Before operation and one month after operation, acoustic reflection technique was adopted to measure their nasopharyngeal and opharyngeal volumes, and polysomnography to record their apnea hypopnea index (AHI), the number of obstructive apnea and the lowest oxygen saturation.Their results were statistically analyzed.ResultsThe postoperative volumes of nasopharynx and pharyngeal cavity, the AHI, the number of obstructive apnea and the lowest oxygen saturation were significantly improved compared with those before operation.The differences were statistically significant(all P<0.001).ConclusionsEndoscopic plasmaassisted bilateral tonsillectomy and adenoidectomyhave good therapeutic effect for OSAHS in children. With objective evaluation of the volumes of nasopharynx and pharyngeal cavity, acoustic reflection technique has good clinical application value for OSAHS in children.