- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04448600
Bone Conduction Implant and MRI (BAHA-IRM)
October 25, 2023 updated by: Fondation Ophtalmologique Adolphe de Rothschild
Baha Bone Conduction Implants and Magnetic Resonance Imaging
Bone conduction implants (BCI) are widely used in cases of conductive/ mixed hearing loss or single side deafness when surgical treatment or air hearing aids are not feasible.
There are two types of BCI, abutments (which pass through the skin) and magnets (where a subcutaneous magnet is coupled to an external magnet).
Pathologies (such as cholesteatoma) leading to the insertion of this hearing implant often require prolonged MRI follow-up.
However, both the abutment and the magnet are responsible for imaging artifacts that limit its interpretation.
Frequency and extent of these artifacts remain unclear in the literature.
In our experience, the magnet, due to its size and composition, produces larger artifacts than the abutment.
The main objective of our study is to compare MRI artifacts for each of these device types (abutment and magnet).
Study Overview
Status
Completed
Intervention / Treatment
Detailed Description
The patients included in the study will all have a cerebral MRI as part of the cholesteatoma follow-up or for the assessment of cerebral or inner ear pathology.
- ENT evaluation: The position of the implant will be evaluated. The distance from the external ear canal (center of the abutment or center of the magnet) will be measured on the patient using a ribbon meter. The angle between the implant and the orbital plane (in degrees) will be evaluated on a profile photograph.
- Imaging evaluation: MRI examinations will be anonymized and sent to a single core laboratory for reading. One reader, a board-certified neuroradiologist with 5 years of experience in inner ear imaging, blinded to all data, will review all MRI examinations on a dedicated workstation with the Carestream Vue PACS software (Carestream Health, Rochester, NY). The main outcome measures will be the size of artifacts and the interpretability of sequences. The following MRI sequences will be performed on a 1.5T scanner (1.5T Philips®, Ingenia), covering the temporal bones :
ROUTINE SEQUENCES
- 2D Diffusion weighted-imaging (WI)
- High-resolution 3D T2-WI TSE (DRIVE)
- Post-contrast 2D T1-WI TSE (axial and coronal planes)
ADDITIONAL SEQUENCES (approximately 20 minutes of additional acquisition time) :
- 2D DWI (axial and coronal) phase inverted
- 2D T2-WI TSE (axial and coronal planes)
- High-resolution 3D T2-WI gradient echo (bFFE)
- post contrast 3D T1-WI TSE and gradient echo (THRIVE)
Study Type
Observational
Enrollment (Actual)
20
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
-
Paris, France, 75019
- Fondation Ophtalmologique Adolphe de Rothschild (FOR)
-
-
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 and older (Adult, Older Adult)
Accepts Healthy Volunteers
No
Sampling Method
Non-Probability Sample
Study Population
Patients with a Baha magnet or abutment hearing implant and having to perform a brain MRI.
Description
Inclusion Criteria Patient over 18 years old Patient with a Baha bone conduction hearing implant, who must perform an MRI examination of the brain, internal auditory canal or middle ear, with or without injection Affiliate or beneficiary of a social security scheme Express consent to participate in the study Exclusion Criteria Patient benefiting from a legal protection measure Pregnant or lactating woman MRI examination not feasible Contraindications to the practice of an MRI: ocular metallic foreign body,certain implanted materials, pacemakers, claustrophobia Contraindications to gadolinium injection, if an MRI is prescribed with gadolinium contrast agent injection allergy, known renal failure: glomerular filtration rate inferior to 30mL by min
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
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Artifact size, measured in millimeters, on MRI sequences.
Time Frame: baseline
|
mm
|
baseline
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
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)
September 28, 2020
Primary Completion (Actual)
September 26, 2023
Study Completion (Actual)
September 26, 2023
Study Registration Dates
First Submitted
June 22, 2020
First Submitted That Met QC Criteria
June 25, 2020
First Posted (Actual)
June 26, 2020
Study Record Updates
Last Update Posted (Actual)
October 26, 2023
Last Update Submitted That Met QC Criteria
October 25, 2023
Last Verified
October 1, 2023
More Information
Terms related to this study
Other Study ID Numbers
- 2019-A03233-54
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
NO
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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