Effects of Hyperbaric Oxygen Therapy on Middle and Inner Ear Functions

Fifty four patients already treated by hyperbaric oxygen therapy recruited from hyperbaric oxygen therapy center of Assiut university hospitals. Otoscopic examination for all patients must be done before and after the session , assessment of middle ear pressure and the state of the eustachian tube through doing eustachian tube function tests (Valsalva and Toynbee tests for ears with intact tympanic membrane and modified inflation - deflation tests for ears with perforated tympanic membrane) by tympanometry for all patients before and after the first session of hjyperbaric oxygen therapy and after completion of the tenth session. Assessment of the hearing threshold level of the patients immediately before the first session and after the tenth session of hyperbaric oxygen therapy through doing pure tone audiometry ( air conduction and bone conduction audiometry) and speech audiometry to assess the speech discrimination score for the patients