Vestibular Function After Cochlear Implantation Using Soft Surgery Techniques

2015-07-22 11:38:23 | BioPortfolio


This study will measure the effects of soft surgical techniques on vestibular function and quality of life in patients pre- and post-cochlear implant (CI) surgery. Additionally, the investigators will attempt to systematically evaluate the utility of different electrophysiological measures of vestibular system function in surgical ears.

Vestibular system function in CI patients will be evaluated pre-surgically and twice post-surgically, at 3 months and again at 1 year post-surgery. Traditional test techniques - such as VNG, rotational testing, and air conduction VEMPs - will be compared to and cross-checked with newer techniques including video head impulse testing (vHIT) and bone conduction VEMPs.


Design & Procedures: The current standard of care for CI patients includes a pre-op evaluation of the vestibular system. For this study, the investigators will compare subjects' routine pre-op test results to two additional post-op assessments performed for study purposes: one in the short term (~3 months post-op) and one in the long-term (~1 year post-op).

The vestibular assessment will take 2 hours and will include the following tests:

1. Video-nystagmography (VNG)

2. rotational testing

3. cervical VEMP testing (cVEMP)

4. ocular VEMP testing (oVEMP)

5. video head impulse testing (vHIT)

6. validated self-report quality of life questionnaire (Dizziness Handicap Inventory [DHI]).

Study Design

Allocation: Non-Randomized, Intervention Model: Single Group Assignment, Masking: Open Label


Vestibular Function in Cochlear Implant Patients


Vestibular testing


Duke University Medical Center
North Carolina
United States




Duke University

Results (where available)

View Results


Published on BioPortfolio: 2015-07-22T11:38:23-0400

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Medical and Biotech [MESH] Definitions

The 8th cranial nerve. The vestibulocochlear nerve has a cochlear part (COCHLEAR NERVE) which is concerned with hearing and a vestibular part (VESTIBULAR NERVE) which mediates the sense of balance and head position. The fibers of the cochlear nerve originate from neurons of the SPIRAL GANGLION and project to the cochlear nuclei (COCHLEAR NUCLEUS). The fibers of the vestibular nerve arise from neurons of Scarpa's ganglion and project to the VESTIBULAR NUCLEI.

Pathological processes of the VESTIBULAR LABYRINTH which contains part of the balancing apparatus. Patients with vestibular diseases show instability and are at risk of frequent falls.

Electronic hearing devices typically used for patients with normal outer and middle ear function, but defective inner ear function. In the COCHLEA, the hair cells (HAIR CELLS, VESTIBULAR) may be absent or damaged but there are residual nerve fibers. The device electrically stimulates the COCHLEAR NERVE to create sound sensation.

The vestibular part of the 8th cranial nerve (VESTIBULOCOCHLEAR NERVE). The vestibular nerve fibers arise from neurons of Scarpa's ganglion and project peripherally to vestibular hair cells and centrally to the VESTIBULAR NUCLEI of the BRAIN STEM. These fibers mediate the sense of balance and head position.

Pathological processes of the VESTIBULOCOCHLEAR NERVE, including the branches of COCHLEAR NERVE and VESTIBULAR NERVE. Common examples are VESTIBULAR NEURITIS, cochlear neuritis, and ACOUSTIC NEUROMA. Clinical signs are varying degree of HEARING LOSS; VERTIGO; and TINNITUS.

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