- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02753179
Covert-saccades, Dynamic Visual Acuity and Quality of Life (COSQOL)
January 13, 2017 updated by: Hospices Civils de Lyon
Quality of Life and Dynamic Visual Acuity in Patients With Bilateral Vestibulopathy: the Impact of Covert-saccades
Patients with chronic bilateral vestibular hypofunction may suffer from a visual instability during head movement called oscillopsia.
Visual consequence of vestibular deficit can lead to a severe impairment of their quality of life.
However, correcting saccades during rapid head movement, called covert-saccades, have been more recently identified.
These saccades, which occur during the head movement in patients with vestibular hypofunction, present a very short latency.
They could compensate for the lack of vestibular-ocular reflex and greatly decrease oscillopsia and visual impairment.
The objective of this study is to evaluate the potential functional benefice of these compensatory movements in a population of 20 patients with chronic bilateral areflexia, in a cross-sectional study.
Study Overview
Status
Completed
Conditions
Study Type
Interventional
Enrollment (Actual)
20
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 Locations
-
-
-
Bron, France, 69500
- Unité de Neuro-Ophtalmologie Hôpital Neurologique
-
-
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 90 years (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
Bilateral Vestibular Hypofunction (BVH) with at least two of the tree following criteria
- Mean peak slow phase velocity of 5°/s or less in bilateral bithermal (30 and 44°C) caloric irrigations
- Pathologic Head-impulse test
- VOR gain of <0.25 on rotatory chair tests
- Disorder present for over 6 month
- Comprehension of the experiments instructions
- Patient consent
Exclusion Criteria:
- Corrected Visual Acuity lower than 5/10
- Other conditions leading to oscillopsia or ataxia
- Oculomotor palsy, ocular instability in primary position
- Cervical rachis pathology with instability
- Cochlear Implants
- Non-stabilized medical disease
- Pregnant women
- Patients under tutelage
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: Basic Science
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Bilateral vestibular hypofunction
Patients suffering from chronic bilateral vestibular hypofunction.
|
Head Impulse Tests are performed by the clinician who holds the patient's head in his hands, while he is looking straight at an earth-fixed target; then by turning the patient's head abruptly and unpredictably to the left or right, up or down through a small angle (only 10-20 degrees - not a large angle).
20 impulses in each directions (6) will be performed.
Dynamic visual acuity Test (DVAT) assesses visual acuity during head movement relative to baseline static visual acuity.
DVA will be assessed actively during self-generated rotations of the head in different directions.
VEMPs & VEMPo are sound evoked muscular contractions of the neck or eye.
They are recorded using an evoked response computer, a sound generator, and surface electrodes to pick up neck or eye muscle activation.
Dizziness Handicap Inventory is a questionnaire that identify difficulties that patient may be experiencing because of dizziness, yielding to a score ranging from 0 to 100
Oscillopsia severity questionnaire is a 9 items questionnaires that identify oscillopsia in different circumstances.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Frequency of covert-saccades
Time Frame: Day 0
|
Frequency of covert saccades corresponds to the total amount of covert-saccades divided by the total amount of head impulse tests multiplied by 100.
|
Day 0
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Quality of life assessed with the Dizziness Handicap Inventory
Time Frame: Day 0
|
Dizziness Handicap Inventory is a questionnaire that identify difficulties that patient may be experiencing because of dizziness, yielding to a score ranging from 0 to 100
|
Day 0
|
Dynamic visual acuity
Time Frame: day 0
|
Dynamic visual acuity is a measure of threshold for binocular reading of letters that are presented on a screen during head impulse test
|
day 0
|
Oscillopsia severity questionnaire score
Time Frame: day 0
|
Oscillopsia severity questionnaire is a 9 items questionnaires that identify oscillopsia in different circumstances.
A mean item score gives an oscillopsia severity score ranging from 1 to 5, yielding to a total score ranging from 0 to 45
|
day 0
|
Latency of covert-saccades
Time Frame: Day 0
|
Latency of covert saccades correspond to the time between the beginning of head impulse and the initiation of the first covert-saccade
|
Day 0
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Caroline TILIKETE, MD, Institut National de la Santé Et de la Recherche Médicale, France
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
May 1, 2016
Primary Completion (Actual)
January 1, 2017
Study Completion (Actual)
January 1, 2017
Study Registration Dates
First Submitted
April 25, 2016
First Submitted That Met QC Criteria
April 26, 2016
First Posted (Estimate)
April 27, 2016
Study Record Updates
Last Update Posted (Estimate)
January 16, 2017
Last Update Submitted That Met QC Criteria
January 13, 2017
Last Verified
January 1, 2017
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- 69HCL15_0746
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
product manufactured in and exported from the U.S.
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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