Audiological Outcomes and Associated Factors after Pediatric Cochlear Reimplantation.

Cochlear implants are the most common and successful sensory neuroprosthetic devices. However, reimplantation can be required for medical reasons, device failure, or technological upgrading. Resolving the problem driving the intervention and offering stable or better audiological results are the main challenges.

Cone-beam computed tomography in children with cochlear implants: The effect of electrode array position on ECAP.

Objectives: To assess the feasibility of using cone-beam computed tomography (CBCT) in young children with cochlear implants (CIs) and study the effect of intracochlear position on electrophysiological and behavioral measurements.

Methods: A total of 40 children with either unilateral or bilateral cochlear implants were prospectively included in the study. Electrode placement and insertion angles were studied in 55 Cochlear implants (16 straight arrays and 39 perimodiolar arrays), using either CBCT or X-ray imaging.

Modeling of Auditory Neuron Response Thresholds with Cochlear Implants.

The quality of the prosthetic-neural interface is a critical point for cochlear implant efficiency. It depends not only on technical and anatomical factors such as electrode position into the cochlea (depth and scalar placement), electrode impedance, and distance between the electrode and the stimulated auditory neurons, but also on the number of functional auditory neurons. The efficiency of electrical stimulation can be assessed by the measurement of e-CAP in cochlear implant users.

Effects of electrode array length on frequency-place mismatch and speech perception with cochlear implants.

Frequency-place mismatch often occurs after cochlear implantation, yet its effect on speech perception outcome remains unclear. In this article, we propose a method, based on cochlea imaging, to determine the cochlear place-frequency map. We evaluated the effect of frequency-place mismatch on speech perception outcome in subjects implanted with 3 different lengths of electrode arrays.

Reliability and complications of 500 consecutive cochlear implantations.

Objectives: To assess device failures as well as early postoperative, late postoperative, and medical complications occurring after cochlear implantation and to discuss their causes and treatments.

Study Design: Retrospective study of 500 consecutive cochlear implantations.

Setting: Tertiary referral center.