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Evaluation of the Effectiveness of Bone-anchored Hearing Aids (Baha) (Baha)

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: NCT01264510
Recruitment Status : Unknown
Verified December 2014 by University Hospital, Ghent.
Recruitment status was:  Active, not recruiting
First Posted : December 21, 2010
Last Update Posted : December 5, 2014
Information provided by (Responsible Party):
University Hospital, Ghent

Brief Summary:

A bone-anchored hearing aid (Baha) consists of a titanium implant located at the mastoid, and a sound processor connected with the implant. The sound processor delivers bone conducted stimuli to the cochlea, bypassing the outer and middle ear.

Some patients who are unable to wear or do not benefit from a conventional air-conduction hearing aid, are candidate for a Baha. Typically, these patients suffer from a conductive or a mixed hearing loss. Recently however, Baha's are also being recommended in patients with unilateral deafness. Sound coming from the deaf side is captured and transmitted through bone conduction to the normal inner ear. The overall benefit of a Baha is more difficult to assess in those patients.

Therefore, the goal of the current study is to examine the benefit of a Baha in patients with different audiological profiles (unilateral or bilateral conductive or mixed hearing loss, and unilateral deafness). Special attention will be given to predictive determinants of the benefit with a Baha, and to the improvement of pre-operative criteria and counseling of patients.

Condition or disease Intervention/treatment Phase
Conductive Hearing Loss Mixed Hearing Loss Unilateral Deafness Other: audiological test battery Phase 4

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 150 participants
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: The Evaluation of the Effectiveness of Bone-anchored Hearing Aids (Baha) in Patients With Conductive or Mixed Hearing Loss, or Unilateral Deafness
Study Start Date : March 2010
Estimated Primary Completion Date : August 2015
Estimated Study Completion Date : August 2015

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
patients implanted with a Bone-anchored hearing aid(Baha) Other: audiological test battery
routine audiological measurements.

Primary Outcome Measures :
  1. benefit of a Bone-anchored hearing aid (Baha) in patients with different audiological profiles [ Time Frame: after 3 months up to 10 years ]
    Patients who are already implanted with a Baha at the University Hospital of Ghent will be re-evaluated once using an audiological test battery. This evaluation will take place at least 3 months after implantation for the recently implanted subjects. For the subjects who are implanted in the past, this evaluation will take place maximum 10 years after implantation. The audiological test battery includes measurements of hearing thresholds, speech understanding in quiet and noise, and auditory orientation tests.

Secondary Outcome Measures :
  1. evaluation of subjective benefit of the Baha [ Time Frame: after 3 months ]
    The subjective benefit of the Baha in different situations will be evaluated by means of questionnaires. No measures regarding safety, tolerability or pain will be evaluated because these measures are already verified for the Baha. The outcome measures are strictly related to audiological factors (e.g. the difference in hearing thresholds/ speech understanding/ orientation with and without Baha). The test duration is estimated at 2 hours.

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:   No

Inclusion Criteria:

  • Patients (males and females) already implanted with a bone-anchored hearing aid (Baha) are included in the study.
  • Only patients above 18 years will be included.

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): NCT01264510

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University Hospital Ghent
Ghent, Belgium
Sponsors and Collaborators
University Hospital, Ghent
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Principal Investigator: Ingeborg Dhooge, MD, PhD University Hospital, Ghent

Additional Information:
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Responsible Party: University Hospital, Ghent Identifier: NCT01264510     History of Changes
Other Study ID Numbers: 2010/074
First Posted: December 21, 2010    Key Record Dates
Last Update Posted: December 5, 2014
Last Verified: December 2014
Keywords provided by University Hospital, Ghent:
conductive hearing loss
mixed hearing loss
unilateral deafness
implanted with Baha
conductive or mixed hearing loss implanted with a Baha or
unilateral deafness implanted with a Baha
Additional relevant MeSH terms:
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Hearing Loss
Hearing Loss, Conductive
Hearing Loss, Mixed Conductive-Sensorineural
Hearing Loss, Unilateral
Hearing Disorders
Ear Diseases
Otorhinolaryngologic Diseases
Sensation Disorders
Neurologic Manifestations
Nervous System Diseases
Signs and Symptoms