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ORIGINAL ARTICLE
Year : 2020  |  Volume : 22  |  Issue : 1  |  Page : 16-20

Prevalence of cochlear dead regions in hearing-impaired patients


1 Department of Otorhinolaryngology, Audiology Unit, Menoufia University Hospital, Menoufia, Egypt
2 Department of Otorhinolaryngology, Audiology Unit, Menoufia University Hospital, Menoufia, Egypt; King Abdullah Ear Specialist Center, Audiology Unit, King Abdulaziz University Hospital, King Saud University, Riyadh, KSA
3 Department of Otorhinolaryngology, Menoufia University, Menoufia, Egypt

Correspondence Address:
Dr. Medhat Fathy Yousef
King Abdullah Ear Specialist Center, Audiology Unit, King Abdulaziz University Hospital, King Saud University, Riyadh, KSA

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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/SJOH.SJOH_20_19

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Objective: The aim is to study the prevalence of dead regions in the cochlea in hearing-impaired patients with different audiometric configurations and to study the speech discrimination scores in dead regions of the cochlea. Materials and Methods: Eighty participants, with age ranging from 18 to 50 years, were divided into control group (30 normal-hearing participants) and study group (50 patients suffering from sensorineural hearing loss). All participants in the study were submitted to the following: medical and audiological history, otological examination, basic audiological evaluation in the form of pure-tone audiometry and tympanometry, auditory brainstem response, and the threshold-equalizing noise (TEN) test. Results: Thirty-nine patients in the study group gave negative results of TEN test and 11 patients gave positive results of TEN test. Conclusions: The prevalence of dead regions of the cochlea in this study was 22%. Dead regions in the cochlea were more common in patients with sloping, long-standing hearing loss and in high frequencies.


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