Longitudinal Acoustic Threshold and Concurrent Electrode Impedance Changes After Cochlear Implantation With Lateral Wall Electrode Arrays
Abstract
PURPOSE: To investigate changes in hearing sensitivity post cochlear implantation with MED-EL and Advanced Bionics (AB) lateral wall electrode arrays, with a focus on characterizing delayed onset hearing loss (doHL) and concurrent electrode impedance changes. METHODS: A retrospective review of 96 adult cochlear implant (CI) recipients (101 ears; MED-EL: 51, AB: 50). Hearing sensitivity was assessed using the low-frequency pure tone average (LFPTA; 125, 250, 500 Hz). Immediate decrements in hearing sensitivity were considered separately from delayed decrements. The incidence, degree, and timing of doHL were characterized. Electrode impedances were considered for individuals with doHL compared with those with stable hearing. RESULTS: Median immediate hearing loss was 19 dB across manufacturers. At initial activation, 73% of subjects had functional (LFPTA
Fields of Study & Subjects
Hearing Loss and Rehabilitation
Ear Surgery and Otitis Media
Hearing
Cochlea
Tinnitus
Genetics
Publication details
- Journal / source
- Otology & Neurotology
- Publisher
- Ovid Technologies (Wolters Kluwer Health)
- Volume
- 47
- Issue
- 4
- Pages
- e635–e641
- Publication date
- 4 February 2026
- Language
- EN