Selection of speech processor in cochlear implant patients: experience in a tertiary hospital.

Abstract

Background: There are two types of speech processors used in CI devices: behind-the-ear (BTE) and off-the-ear (OTE).

Objectives: This study aimed to investigate the characteristics of patients and revision cases in relation to the type of speech processors.

Materials and methods: A retrospective review of 452 ears that underwent CI was performed.

Results: Children with severe inner ear anomalies (91.7%) more frequently preferred BTE speech processors than those without severe inner ear anomalies (p = .000). The magnet strength used in OTE speech processor users was significantly higher than in BTE speech processor users (p = .002). In cochlear implantees who underwent surgery before 12 months of age, the magnet strength in the revision group was greater than in the non-revision group (p = .025).

Conclusions and significance: Overall, our findings suggest factors to consider when choosing the type of speech processor and modifying the magnet strength of the implant device. The choice between BTE and OTE speech processors led to different required magnet strengths, contributing to the occurrence of skin flap inflammation.