Implantation of a vestibular prosthesis.

Conditions: cochlear implant, vestibular implant, vestibular prosthesis, bilateral vestibular areflexia, cochleair implant, vestibulair implantaat, vestibulaire prothese, bilateraal vestibulair functieverlies

Registration Number: NL-OMON22853

Lead Sponsor: Maastricht University Medical Centre (MUMC+)

Brief Summary: /A

Detailed Description: Not available

Recruitment & Eligibility

Status: Pending

Sex: Not specified

Target Recruitment: 5

Inclusion Criteria

1. Since vestibular surgery still has a risk of deafening the patients, the selected patients are >18 years old, have a bilateral loss of vestibular function with disabling symptoms and have a severe perceptive hearing loss in at least one ear (in other words: they are already deaf in the tested ear);

2. Giving informed consent.

Exclusion Criteria

1. Incapacitated patients;

2. Carrier of any other implanted electronic device (e.g. pace-maker);

Study & Design

Study Type: Interventional

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
1. The gain, phase and direction of VOR will be measured and adjusted accordingly, with use of electronystagmography and video-nystagmography in function of frequency and amplitude of electric stimulation in the conditions mentioned below:<br /><br>A. Patients with different vestibular loss etiology;<br /><br>B. Stimulation of the superior, lateral and posterior ampullary nerve;<br /><br>C. Using a long-term implanted vestibular prosthesis.<br /><br>2. Performance in balance tests (routine ENG-examination);<br /><br>3. Questionnaires about subjective parameters;<br /><br>4. Audiometric results pre- and postoperatively (including audiometric results during activation of the implant).

Secondary Outcome Measures