Assessment of Bimodal Contribution in Adult Cochlear Implant Users

Bnai Zion Medical Center

Status: Unknown

Conditions: Deafness

Treatments: Behavioral: Speech perception tests and self-rating questionnaire

Study type: Interventional

Funder types: Other

Identifiers

NCT02331017

BZ0084

Details and patient eligibility

About

To evaluate the combination of electric hearing through Cochlear Implant and acoustic hearing through hearing aid in bimodal users with moderate-to-severe hearing loss in the non-implanted ear. The research will also provide pilot study data on unilateral Cochlear Implant recipients with residual useful acoustic hearing in the implanted ear whose acoustic hearing has been preserved.

Full description

Many current unilateral Cochlear Implant users have some residual acoustic hearing in the opposite ear as well as in the implanted ear. The amount of useful residual acoustic hearing varies among these implantees. There are several acoustic and electric combinations in the bilateral-bimodal listening mode depending on the amount of useful residual acoustic hearing in each ear. The combination of low frequency acoustic information provided by the hearing aid on each ear, completes the high frequency electric information provided by the Cochlear Implant (complementary bimodal benefit). Each of the different rehabilitation combinationsfor unilateral Cochlear Implant users enablesa unique integration of the three aspects of bilateral hearing bilaterality, binaurality and bimodality which may provide significant advantages over unilateral Cochlear Implant stimulation in terms of speech perception in noise, complementary information as well as localization abilities.

The study will include 20 bilateral-bimodal users with moderate-to-severe hearing loss at 250 Hz, 500 Hz and 1000 Hz in the non-implanted ear, who use hearing aids for at least 75% of their waking hours. Evaluation utilizes bilateral-binaural and bimodal complementary effects task-specific test batteries based on published doctoral research project. The assessment protocol consisted of tests that include various speech materials, different maskers, presentation of the noise from different locations in space, right/left speech lateralization, pitch-related tasks and subjective questionnaires. All tests will be administered in three listening conditions: Cochlear Implant -alone, hearing aid-alone and Cochlear Implant +hearing aid.

Enrollment: 20 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Bilateral-bimodal users
• With moderate-to-severe hearing loss at 250 Hz, 500 Hz and 1000 Hz in the non-implanted ear
• Who use hearing aids for at least 75% of their waking hours

Exclusion criteria

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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20 participants in 1 patient group

Bimodal users

Experimental group

Description:

Bilateral-bimodal users with moderate-to-severe hearing loss who use hearing aids for at least 75% of their waking hours. Administration of Speech perception tests and self-rating questionnaire

Treatment:

Behavioral: Speech perception tests and self-rating questionnaire