- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04198909
Optimization of a Non-invasive Electrophysiological Method for Studying the Functionality of Auditory Nerve Fibers (ECOG)
August 8, 2023 updated by: University Hospital, Clermont-Ferrand
Acoustic overexposure can induced temporary or hearing loss.
Usually hearing loss is associated with cochlear cell damages.
Recently, a new pathological entity was described and called "hidden hearing loss".
In animal model, the histopathology revealed a selective reduction in the number of auditory fibers, resulting in a decrease in the amplitude of wave I of the auditory brainstem response.
Electrocochleography (Ecog) is a method for recording the electrical potentials of the cochlea (e.g.
wave I).
In clinical routine, Ecog is performed invasively with sedation or local anesthesia.
Actually, a non invasive approach could be perform but it seems necessary to optimize this method and to define reference values in healthy volunteers.
Study Overview
Status
Recruiting
Conditions
Detailed Description
The sound overexposure is a major cause of hearing disorders.
The installation of hearing disorders can be temporary or permanent.
Most of the time the investigators see a rise in hearing thresholds that can be accompanied by tinnitus.
However, sometimes-hearing disorders aren't characterized by higher auditory threshold but by a complaint of understanding in noise.
Two explanation are the either possible with a lesion at the peripheral level (sensory organ) or central lesion (auditory pathways).
Peripheral damage is easily analysed by conventional tests such as the audiogram.
Concerning the central lesions, through to the Electrocochleography, one sees a diminution of the wave I which corresponds to the nerve fiber injury.
The wave I can more easily be analysed by the Electrocochleography method.
This technique previously used an electrode deposited trans-tympanically in contact with the sensory organ.
But, the evolution of a non-invasive technique is now available.
However, several assemblies of the electrode are then possible without knowing the impact of these on the morphology of the wave I.
Moreover, no normative values are also referenced in the literature on the population without hearing problems.
It's in this context that clinical study is carried out in order to optimize the technique on the assembly of the electrode and the acoustic stimulation delivered.
After this analyses and obtaining an optimal technique it's envisaged to study the morphology of the wave I in healthy volunteers aged 18-25 years.
A pre-inclusion visit will verify the volunteers doesn't have a hearing disorders through a questionnaire, otoscopy, tympanometry and audiometry.
Then two steps will be realized.
The first is to evaluate the morphology of wave I according to assembly of electrode and acoustic stimulation delivered (machine calibration or calibration in the external auditory canal).
The second step will provide normative values for people 18-25 years old who aren't hearing-impaired.
Volunteers will have the choice to participate in one or both stages.
The aim is to obtain wave I reference values for Electrocochleography technique.
The secondary objectives are to analyse the impact of the assembly of the electrode and the adaptation of the acoustic stimulation presented.
Study Type
Interventional
Enrollment (Estimated)
430
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Contact
- Name: Lise Laclautre
- Phone Number: 334.73.754.963
- Email: promo_interne_drci@chu-clermontferrand.fr
Study Locations
-
-
-
Clermont-Ferrand, France, 63003
- Recruiting
- CHU Clermont Ferrand
-
Principal Investigator:
- Fabrice Giraudet
-
Contact:
- Lise Laclautre
- Email: promo_interne_drci@chu-clermontferrand.fr
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years to 25 years (Adult)
Accepts Healthy Volunteers
Yes
Description
Inclusion Criteria:
- Between 18 and 55 years old
- be affiliated to a social security system
- understand (oral and written) of the French language
- be a qualified hearing with normal tympanogram and audiogram
Exclusion Criteria:
- have a complaint of hearing
- have a exposure to noise (professional and/or activities)
- refusal to participate in the study
- have ear infections and/or ENT medical history
- have cardiovascular, metabolic, neurological and psychiatric desease
- being a protected person
- healthy volunteer who has received compensation equal to or greader than 4500€ in clinical study
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Diagnostic
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Cohort 1
|
Electrocochleography is a technique that analyses the functionality of inner ear.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Latency of wave I by electrocochleography
Time Frame: Day 180
|
The wave I analyzed at electrocochleography will allow to obtain the latency (milliseconds) of action potential (AP)
|
Day 180
|
Latency of wave I by electrocochleography
Time Frame: Day 360
|
The wave I analyzed at electrocochleography will allow to obtain the latency (milliseconds) of action potential (AP)
|
Day 360
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Hearing thresholds in decibels
Time Frame: Day -1 , Day 180, Day 360
|
The audiometry will make it possible to obtain the hearing thresholds in decibels for all frequency of 250, 500, 750, 1000, 1500, 2000, 3000, 4000, 6000, 8000, 9000, 10000, 11200, 12500 and 14000 Hz.
|
Day -1 , Day 180, Day 360
|
Acoustic reflex thresholds in decibels
Time Frame: Day -1 , Day 180, Day 360
|
The acoustic reflex allows to evaluate the trigger threshold in decibels of the reflex for the frequencies 500, 1000, 2000, 4000Hz.
|
Day -1 , Day 180, Day 360
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Collaborators
Investigators
- Principal Investigator: Fabrice Giraudet, Université d'Auvergne
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
April 29, 2019
Primary Completion (Estimated)
May 1, 2026
Study Completion (Estimated)
May 1, 2026
Study Registration Dates
First Submitted
November 28, 2019
First Submitted That Met QC Criteria
December 12, 2019
First Posted (Actual)
December 13, 2019
Study Record Updates
Last Update Posted (Actual)
August 9, 2023
Last Update Submitted That Met QC Criteria
August 8, 2023
Last Verified
August 1, 2023
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- RBHP 2018 GIRAUDET
- 2018-A02525-50 (Other Identifier: 2018-A02525-50)
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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