Repository logo

Hearing outcomes of cochlear implant recipients with pre-operatively identified cochlear dead regions.

Accepted version

No Thumbnail Available



Change log


Shrivastava, MK 
Eitutis, ST 
Lee, JW 
Axon, PR 
Donnelly, NP 


Objectives: To determine how patients who did not meet UK TA166 NICE criteria for cochlear implantation (CI) but were subsequently found to have cochlear dead regions (DRs) performed with CI.Methods: A retrospective review of medical records was performed on CI recipients: 152 controls and 40 in the DR group. Of these, 34 pairs were matched by pre-operative Bamford-Kowal-Bench (BKB) scores and compared.Results: The forty DR patients had a median age at implantation of 56 years. Their mean pre-operative BKB score of 23% increased to 78% after CI. Thirty-seven experienced improvements in BKB scores. In matched case-control analysis, the improvement in mean BKB score with CI was no different (p = 0.19) between the DR group and control group; a similar proportion of patients benefitted in each group.Discussion: This study is the largestreport to date of performance of patients with DRs, before and after CI. The DR group gain similar benefit as the controls.Conclusion: Patients with DRs, who did not meet TA166 NICE criteria, received the same benefit as those who did. TEN testing to detect DRs should be included in routine CI work-up where standard criteria are not met.



Cochlear implant, Dead region, TEN, Case-Control Studies, Cochlea, Cochlear Implantation, Cochlear Implants, Deafness, Female, Hearing, Hearing Tests, Humans, Male, Middle Aged, Postoperative Period, Preoperative Period, Retrospective Studies, Treatment Outcome

Journal Title

Cochlear Implants Int

Conference Name

Journal ISSN


Volume Title



Informa UK Limited


All rights reserved