In:
Otology & Neurotology, Ovid Technologies (Wolters Kluwer Health), Vol. 42, No. 8 ( 2021-09), p. 1149-1155
Abstract:
To characterize the relationship between cochlear duct length (CDL) and initial hearing preservation among cochlear implant recipients of a fully inserted 31.5 mm flexible lateral wall electrode array. Study Design: Retrospective review. Setting: Tertiary academic referral center. Patients: Adult cochlear implant recipients who presented preoperatively with unaided hearing detection thresholds of ≤ 65 dB HL at 125 Hz and underwent cochlear implantation with a 31.5 mm flexible lateral wall array. Intervention: Cochlear implantation with a hearing preservation surgical approach. Main Outcome Measures: Computed tomography was reviewed to determine CDL. Hearing preservation was characterized by the shift in low-frequency pure-tone average (LFPTA; 125, 250, and 500 Hz), and shift in individual unaided hearing detection thresholds at 125, 250, and 500 Hz. Results: Nineteen patients met the criteria for inclusion. The mean CDL was 34.2 mm (range: 30.8–36.5 mm). Recipients experienced a mean LFPTA shift of 27.6 dB HL (range: 10–50 dB HL). Significant, negative correlations were observed between CDL and smaller threshold shifts at individual frequencies and LFPTA ( p ≤ 0.048). Conclusion: A longer CDL is associated with greater likelihood of preserving low-frequency hearing with long arrays. Low-frequency hearing preservation is feasible with fully inserted long flexible arrays within the initial months after cochlear implantation. Preoperative measurement of CDL may facilitate a more individualized approach in array selection to permit optimal cochlear coverage while enhancing hearing preservation outcomes.
Type of Medium:
Online Resource
ISSN:
1531-7129
,
1537-4505
DOI:
10.1097/MAO.0000000000003181
Language:
English
Publisher:
Ovid Technologies (Wolters Kluwer Health)
Publication Date:
2021
detail.hit.zdb_id:
2058738-7
