Long Term Outcomes After Vestibular Implantation

Last updated: March 10, 2025
Sponsor: Johns Hopkins University
Overall Status: Active - Recruiting

Phase

N/A

Condition

Hearing Impairment

Ear Infections

Ear Infections (Pediatric)

Treatment

Labyrinth Devices MVI™ Multichannel Vestibular Implant System

Clinical Study ID

NCT06500975
IRB00434328
  • Ages 22-90
  • All Genders

Study Summary

Although cochlear implants can restore hearing to individuals who have lost cochlear hair cell function, there is no widely available, adequately effective treatment for individuals suffering chronic imbalance, postural instability and unsteady vision due to bilateral vestibular hypofunction. Prior research focused on ototoxic cases has demonstrated that electrical stimulation of the vestibular nerve via a chronically implanted multichannel vestibular implant can partially restore vestibular reflexes that normally maintain steady posture and vision; improve performance on objective measures of postural stability and gait; and improve patient-reported disability and health-related quality of life. This single-arm open-label study extends that research to evaluate outcomes for up to 8 individuals with non-ototoxic bilateral vestibular hypofunction, yielding a total of fifteen adults (age 22-90 years at time of enrollment) divided as equally as possible between ototoxic and non-ototoxic cases.

Eligibility Criteria

Inclusion

Inclusion Criteria

  • Adults older than 22 years old who

  • have previously been enrolled in Johns Hopkins University Institutional Review Board protocol NA_00051349, IRB00335294 or IRB00346924 and

  • have previously been implanted with a vestibular implant under FDA IDE G150198

Study Design

Total Participants: 32
Treatment Group(s): 1
Primary Treatment: Labyrinth Devices MVI™ Multichannel Vestibular Implant System
Phase:
Study Start date:
December 01, 2024
Estimated Completion Date:
December 31, 2029

Study Description

There is no widely available, adequately effective treatment for individuals suffering chronic imbalance, postural instability and unsteady vision due to loss of semicircular canal function despite vestibular rehabilitation exercises. The experience of 15 adults with bilateral vestibular hypofunction who underwent unilateral surgical placement of a vestibular implant and have received continuously motion-modulated electrical stimulation of the vestibular nerve for >6 months revealed vestibular implantation (VI) and motion-modulated stimulation can partially restore vestibular sensation and reflexes that normally maintain steady posture and vision. This study will examine long-term outcomes after vestibular implantation. Within constraints on power and/or minimum detectable effect size due to limits on the number of study participants permitted under IDE G150198, the study will test the following hypotheses regarding unilateral vestibular implantation, activation and long-term (≥3 years) continuous/daily use:

  1. It is safe, as determined by incidence of serious unanticipated adverse device-related events and as further quantified by proportions of:

    1. implanted ears with preservation of 4-frequency pure tone average for 0.5,1,2,4 kHz air-conducted audiometric detection thresholds ≤ 50 decibel (dB) HL and ear-specific speech discrimination ≥50% (consistent with Class A or B per American Academy of Otolaryngology-Head and Neck Surgery 1995 guidelines 13 ) or ≤ 30 dB change from preoperative baseline (if preoperative baseline is ≥20 dBHL) and ear-specific speech discrimination ≤30% worse than preoperative baseline (if preoperative baseline is ≤80%)

    2. participants with preservation of useful sound-field hearing by the above criteria, and

    3. implanted ears with preservation of otolith endorgan function, if present pre-operatively

  2. It is tolerable, as quantified by duration of compliance with use.

  3. It is efficacious, as defined by nonzero improvement with respect to preoperative baseline gait stability as quantified by Dynamic Gait Index (DGI) and vestibulo-ocular reflex gain during passive head impulse rotation (VHITG) .

Connect with a study center

  • Johns Hopkins School of Medicine

    Baltimore, Maryland 21287
    United States

    Active - Recruiting

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