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Evaluation of a Revised Indication for Determining Adult Cochlear Implant Candidacy

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01337076
Recruitment Status : Completed
First Posted : April 18, 2011
Results First Posted : September 25, 2014
Last Update Posted : October 27, 2016
Information provided by (Responsible Party):

Brief Summary:
The Sponsor values the progression of hearing healthcare practice and acknowledges a need for re-evaluation of indications for determining adult cochlear implant candidacy. This need arises from current research, peer reviewed literature, and technological advancement with concomitant performance outcomes. To address this specifically, the Sponsor proposes to evaluate the safety and efficacy of the Cochlear™ Nucleus® implant system with a revised indication.

Condition or disease Intervention/treatment Phase
Hearing Loss Device: cochlear implant Not Applicable

Detailed Description:
Existing research, as discussed, supports the opinion that current candidacy criteria are set conservatively. The Sponsor, in addition to the support of recent peer reviewed literature illustrating a need for an appropriate criteria and more suitable speech recognition measure, believe it is appropriate at this time to re-evaluate the candidacy requirements associated with adult cochlear implantation. Specifically, this will be accomplished by evaluating the safety and efficacy of the Cochlear™ Nucleus® cochlear implant system under revised cochlear implant indications. The proposed approach would be to evaluate individuals scoring between 10 - 40% inclusively on Consonant Nucleus Consonant (CNC) monosyllabic words who do not meet current approved speech perception criteria with the widely used sentence measure Hearing In Noise Test (HINT) in quiet. No change to current qualifying audiometric criteria (bilateral moderate to profound sensorineural hearing loss in the low frequencies and profound hearing loss in the mid to high speech frequencies) for implant candidacy is proposed.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 21 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Evaluation of a Revised Indication for Determining Adult Cochlear Implant Candidacy
Study Start Date : May 2012
Actual Primary Completion Date : January 2014
Actual Study Completion Date : January 2014

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
cochlear implant Device: cochlear implant
Cochlear implant surgery
Other Name: implantable hearing device

Primary Outcome Measures :
  1. CNC Monosyllabic Word Score - Treated Ear [ Time Frame: Six months ]

    The primary study endpoint was to test whether a statistically significant difference could be obtained between the mean, preoperative Consonant Nucleus Consonant (CNC) monosyllabic word score in the ear to be implanted compared to the postoperative CNC word score in the cochlear implant alone condition at 6 months postimplant activation for candidates who currently perform outside the approved Nucleus® cochlear implant candidacy requirements.

    CNC Word Test is a validated test of open-set word recognition. The test consists of 10 lists with 50 monosyllabic words in each list. Subject responses are scored for both words and phonemes correct in the correct sequence. Subjects will be tested using a configuration of speech at 0º azimuth in quiet.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Eighteen years of age or older at the time of the study.
  • Preoperative aided CNC word score in quiet of greater than or equal to 10% and less than or equal to ¬¬40% in the ear to be implanted; equal to but no better than 50% in the contralateral ear
  • Bilateral moderate to profound hearing loss in the low frequencies (up to 1000 Hz) and profound sensorineural hearing loss in the high speech frequencies (3000 Hz and above)
  • Willingness to use bimodal stimulation (i.e. a cochlear implant on one ear and a hearing aid on the contralateral ear) through at least 6-months postactivation.
  • English spoken as the primary language.

Exclusion Criteria:

  • Congenital hearing loss (for the purpose of this study, onset prior to 2 years-of-age).
  • Preoperative aided HINT sentence score less than or equal to 50% in the ear to be implanted
  • Ossification, absence of cochlear development or any other cochlear anomaly that might prevent complete insertion of the electrode array.
  • Hearing loss of neural or central origin (e.g., deafness due to lesions on the acoustic nerve or central auditory pathway).
  • Active middle-ear infection.
  • Unwillingness and/or inability of the candidate to comply with all investigational requirements including, but not limited to, study protocol and surgical procedure.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01337076

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United States, Minnesota
Mayo Clinic
Rochester, Minnesota, United States, 55905
Sponsors and Collaborators
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Principal Investigator: Colin Driscoll, MD Mayo Clinic
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Responsible Party: Cochlear Identifier: NCT01337076    
Other Study ID Numbers: CAM-EXP-A2010-01
First Posted: April 18, 2011    Key Record Dates
Results First Posted: September 25, 2014
Last Update Posted: October 27, 2016
Last Verified: September 2016
Additional relevant MeSH terms:
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Hearing Loss
Hearing Disorders
Ear Diseases
Otorhinolaryngologic Diseases
Sensation Disorders
Neurologic Manifestations
Nervous System Diseases
Signs and Symptoms