- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02093806
Clinical Applications of Round Window Imaging Anatomy in Cochlear Implant Surgery
Clinical Applications of Round Window High Resolution Computerised Tomography Anatomy in Cochlear Implant Surgery
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
The assessment of the anatomy of the round window will be executed using the stractured measuring software used for imaging of the Bnai Zion medical center (CARESTREAM PACS Ver. 11.0, CARSTREAM HEALTH INC.) in IAC window (centered at 700 with a total width of 4000) in the available zoom by the software (usually 400-800%).
Measuring the length (mm) and angle will be executed by the software's structured rulers.
Measuring protocol:
- Measured scans: one taken in an orbito-meatal plane
- Chosen slices: where both the round window niche and the external ear canal are seen on the same slice
Distances measured:
- Distance 1: between the anterior edge of the round window niche and the cortex of the mastoid, with a minimal distance of 0.5mm to the posterior wall of the external ear canal
- Distance 2: between the posterior edge of the round window niche and the cortex of the mastoid, with a minimal distance of 0.3mm to the anterior edge of the mastoid segment of the facial nerve.
- Distance 3: the size of the round window niche (from its anterior to posterior edges)
- Distance 4: between the anterior (most medial) edge of the round window membrane to a point at least 0.3mm anterior to the mastoid segment of the facial nerve.
- Distance 5: between the posterior (most lateral) edge of the round window membrane to a point at least 0.3mm anterior to the mastoid segment of the facial nerve
- Distance 6: size of round window membrane (anterior/medial to posterior/lateral)
- Distance 7: between the lateral edges of distance 1 and 2 marking the cortical size of the "working channel" created between the lines (from the cortex to the round window).
Angles measured:
- Between distance 1 and 7 - marking the angle of the "working channel" relatively to the cortex
- Between distance 1, passing in the middle of distance 3 to the middle of distance 6 - marking the angle of possible insertion from the working channel into the cochlea
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
-
-
-
Haifa, Israel
- Bnai Zion Medical Center
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- age 20 years old or older
- high resolution computerized tomography of the temporal bone (slices ≤1mm) before the surgery
- on the measured slices both the round window niche and the posterior wall of the external ear canal are seen
Exclusion Criteria:
- inner, middle or external ear malformation
- temporal bone malformation
- status post cochlear implant
- status post temporal bone trauma
- slices were the round window niche and the posterior wall of the external ear canal are not seen on the same slice
Study Plan
How is the study designed?
Design Details
- Observational Models: Case-Only
- Time Perspectives: Retrospective
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
CT of the temporal bone
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
the size of round window niche and its relation to the cochlea
Time Frame: january-june 2014 (six months)
|
january-june 2014 (six months)
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
sizes of working channel from the mastoid cortex into the round window membrane and its relation to the mastoid sagment of the facial nerve
Time Frame: january-june 2014 (six months)
|
january-june 2014 (six months)
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Michal Luntz, Prof., chair of otorhinolaryngology department at the Bnai Zion medical center
Study record dates
Study Major Dates
Study Start
Primary Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 0140-13-BNZ (Other Grant/Funding Number: TRADIS GAT LTD. ISRAEL)
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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