Insertion Depth and Cochlear Implant Speech Recognition Outcomes: A Comparative Study of 28- and 31.5-mm Lateral Wall Arrays

Objectives: 1) To compare speech recognition outcomes between cochlear implant (CI) recipients of 28- and 31.5-mm lateral wall electrode arrays, and 2) to characterize the relationship between angular insertion depth (AID) and speech recognition. Study Design: Retrospective review. Setting: Tertiary academic referral center. Patients: Seventy-five adult CI recipients of fully inserted 28-mm (n = 28) or 31.5-mm (n = 47) lateral wall arrays listening with a CI-alone device. Interventions: Cochlear implantation with postoperative computed tomography. Main Outcome Measures: Consonant-nucleus-consonant (CNC) word recognition assessed with the CI-alone at 12 months postactivation. Results: The mean AID of the most apical electrode contact for the 31.5-mm array recipients was significantly deeper than the 28-mm array recipients (628° vs 571°, p 
Source: Otology and Neurotology - Category: ENT & OMF Tags: COCHLEAR IMPLANTS Source Type: research