- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03599804
Vestibular Cochlear Implant Hearing Impaired Child
Vestibular Function in Cochlear Implanted Hearing Impaired Children
Study Overview
Status
Conditions
Detailed Description
The structural and functional integrity of the vestibular system is necessary for maintenance of the complex postural system and adaptation to the environment. The absence of vestibular function is accompanied by poor prognosis and severe limitations in the activities of daily life, such as ambulating in low-light environments or on uneven ground, swimming, driving fast, etc.
The exact mechanisms responsible for the postoperative vestibular changes and/or symptoms, but several theories exist. Because of the very anatomic proximity between the auditory and vestibular systems, and their embryologic and physiologic alterations, they may be simultaneously involved in some bodily dysfunctions. This involvement is more frequent in peripheral alterations than in central ones.
The lateral wall and the fluid space are breached during cochleostomy. Insertion of electrode array may cause changes in the normal fluid homeostasis of the inner ear, damage to the basilar membrane, osseous spiral lamina and vestibular receptors; utricle, saccule and semicircular canals, surgery-induced inflammation resulting in fibrosis or loss of hair cells, foreign body reaction (labyrinthitis), produce perilymph leakage and alter the pressure in the inner ear. In addition, the electric stimulation of the cochlear implant may cause pathologic changes in the inner ear as a subsequent dysfunction of structures, resulting in vestibular alterations.
In previous research, the following vestibular assessments were utilized to determine vestibular injuries after CI: Caloric response, videonystagmography (VNG), vestibular-evoked myogenic potentials (VEMPs), video head impulse test (VHIT), rotatory chair and scleral search coil.
Knowledge of vestibular system function before and after CI surgery is important for the satisfactory management of each case. It also helps in the selection of which ear to implant to avoid bilateral vestibular areflexia and can assist in the management of any postoperative vestibular symptoms. So, there are two questions that should be raised when we consider the vestibular function of a patient who will submitted to CI: Is vestibular function present or not? and is the function symmetric?
Study Type
Enrollment (Anticipated)
Contacts and Locations
Study Contact
- Name: Marwa Hu Hamza, Master
- Phone Number: 01021101180
- Email: marwa.hamza20687@gmail.com
Study Contact Backup
- Name: Enass S Mohamed, MD
- Phone Number: 01003362922
- Email: enasshassan40@yahoo.com.au
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- Children with bilateral severe to profound sensorineural hearing loss.
- Age less than 6years at time of implantation.
- Prelingual deafness.
Exclusion Criteria:
- Incomplete follow up.
- Other pathologies affecting balance as orthopedic problems before surgery.
Study Plan
How is the study designed?
Design Details
- Observational Models: Cohort
- Time Perspectives: Prospective
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Head thrust test
Time Frame: baseline
|
Clinical test which assesses vestibuloocular (VOR) function in which examiner briskly rotate patient's head to both sides while patient fixate his eyes on a target and watch for corrective saccades on eye movements.
|
baseline
|
Bruininks-Oseretsky test of motor proficiency (BOT-2)
Time Frame: baseline
|
Clinical balance test which assesses vestibulospinal (VSR) function, patient stand on a firm surface and on a soft cushion with eyes closed and eye open, a scoring system is obtained for all these balance situations.
|
baseline
|
Caloric test
Time Frame: baseline
|
Objective test of VOR, includes irrigation of warm and\or cool water into patient's external auditory canal and measure the resulting nystagmus by a computerized system.
|
baseline
|
Vestibular evoked myogenic potentials (VEMPs)
Time Frame: baseline
|
Objective test of vestibulocollic (VCR) function which assesses otolithic organs, VEMPs amplitudes and latencies are measured by a computerized system.
|
baseline
|
Collaborators and Investigators
Sponsor
Investigators
- Study Director: Enass S Mohamed, MD, Assiut universty
Publications and helpful links
General Publications
- Bittar RSM, Sato ES, Ribeiro DJS, Tsuji RK. Preoperative vestibular assessment protocol of cochlear implant surgery: an analytical descriptive study. Braz J Otorhinolaryngol. 2017 Sep-Oct;83(5):530-535. doi: 10.1016/j.bjorl.2016.06.014. Epub 2016 Jul 31.
- Krause E, Wechtenbruch J, Rader T, Gurkov R. Influence of cochlear implantation on sacculus function. Otolaryngol Head Neck Surg. 2009 Jan;140(1):108-113. doi: 10.1016/j.otohns.2008.10.008.
- Todt I, Basta D, Ernst A. Does the surgical approach in cochlear implantation influence the occurrence of postoperative vertigo? Otolaryngol Head Neck Surg. 2008 Jan;138(1):8-12. doi: 10.1016/j.otohns.2007.09.003.
- Kubo T, Yamamoto K, Iwaki T, Doi K, Tamura M. Different forms of dizziness occurring after cochlear implant. Eur Arch Otorhinolaryngol. 2001 Jan;258(1):9-12. doi: 10.1007/pl00007519.
- Vibert D, Hausler R, Kompis M, Vischer M. Vestibular function in patients with cochlear implantation. Acta Otolaryngol Suppl. 2001;545:29-34. doi: 10.1080/000164801750388063.
- Vibert D, Liard P, Hausler R. Bilateral idiopathic loss of peripheral vestibular function with normal hearing. Acta Otolaryngol. 1995 Sep;115(5):611-5. doi: 10.3109/00016489509139375.
- Frazza MM. (1999): Propedèutica otoneurológica básica. In: Gananҫ, FF (coordenator). Um giro pela vertigem. Sào Paulo: Alaúde; p.21-24.
- Hempel JM, Jager L, Baumann U, Krause E, Rasp G. Labyrinth dysfunction 8 months after cochlear implantation: a case report. Otol Neurotol. 2004 Sep;25(5):727-9. doi: 10.1097/00129492-200409000-00014.
- Katsiari E, Balatsouras DG, Sengas J, Riga M, Korres GS, Xenelis J. Influence of cochlear implantation on the vestibular function. Eur Arch Otorhinolaryngol. 2013 Feb;270(2):489-95. doi: 10.1007/s00405-012-1950-6. Epub 2012 Apr 6.
Study record dates
Study Major Dates
Study Start (Anticipated)
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- VCIHIC
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
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