Observational StudyHighlightedEffect of Hydrogen Inhalation Therapy on Hearing Loss of Patients With Nasopharyngeal Carcinoma After RadiotherapyMHID-8463226PMID: 354337312022Frontiers in MedicineXiaofeng Kong, Tianyu Lu, You-Yong Lu, Zhinan Yin, Kecheng XuObjective: To evaluate the clinical efficacy and safety of hydrogen inhalation in improving hearing loss in patients with long-term survival of nasopharyngeal carcinoma after radiotherapy. Methods: The eustachian tube dysfunction score, pure tone air conduction threshold, bone conduction threshold, the score of tympanogram and otoscope were prospectively observed in patients with deafness after ra