Scalar Localization Cochlear Electrode Array Using 64 Slice CT

Mayo Clinic

Status: Completed

Conditions: Hearing Loss

Study type: Observational

Funder types: Other

Identifiers

NCT00587262

06-004832

Details and patient eligibility

About

Insertion of electrode array in scala vestibuli, rather than the preferred location within scala tympani, leads to loss of native hearing in those patients with isolated high-frequency hearing loss undergoing cochlear implantation.

Full description

We aim to determine the surgical placement in patients with high frequency who had long electrode array insertions because they did not meet audiometric criteria for short array devices.

From this basis we will be able to determine if suboptimal insertion (e.g., in the scala vestibuli) leads to loss of low-frequency hearing in these patients. We also will look at the possibilities of using this data in predicting outcomes, modifying implant design, and perfecting surgical technique.

Enrollment: 5 patients

Sex: All

Ages: 8 to 100 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Registered in the Cochlear Implant Database.
• Patient has short or long electrode cochlear implant for high frequency hearing loss.

Exclusion criteria

• Inability to provide consent.
• Patients with underlying otospongiosis, extensive labyrinthitis ossificans or cochlear dysplasia. (These patients would have been identified with pre-operative imaging prior to cochlear implantation).

Trial design

5 participants in 3 patient groups

1

Description:

Two pediatric participants with high frequency hearing loss post cochlear implant with either long or short electrode array.

2

Description:

Eight participants with high frequency hearing loss post cochlear implant with either short or long electrode array.

3

Description:

Fifteen participants from the existing Cochlear Implant data base.