E-Posters

introduction / background

Cochlear implantation surgery is the gold standard for treating severe to profound sensorineural hearing loss.1 as vestibular end-organs and cochlea share a common embryological origin children with profound sensorineural hearing loss may have vestibular affection.2 Cochlear implantation leads to postoperative modifications of the vestibular function. The damage in some cases is caused by fibrosis of the vestibule and distortion of the saccular membrane or direct injury and labrynthitis. An alternative mechanism by which CI may positively impact balance function is via direct stimulation of the vestibular nerves.3

Objectives

The aim of this study was to evaluate Vestibulo-Ocular reflex (VOR) in children with cochlear implant using Rotatory chair testing and compare these result with children with severe to profound sensorineural hearing loss without cochlear implantation.

Materials & Methods

This work included 20 children with bilateral normal hearing, 20 children with bilateral severe to profound sensory neural hearing loss and 20 children with unilateral cochlear implant. The vestibular system was evaluated by using Arabic DHI, vestibular bed-side tests for children and SHA and VST of Rotatory Chair test.

Results

Significant affection in the Arabic DHI and in vestibular bed-side tests were found in study groups. Rotatory chair results in severe or severe to profound hearing loss group showed 50% of children had unilateral peripheral vestibular affection and 15% had bilateral affection. While in cochlear implant group showed 40% of children had unilateral affection and 15% had bilateral affection.

Conculsion

children with severe or severe to profound hearing loss and children with cochlear implant had vestibular affection revealed by DHI, vestibular bed side test and Rotatory chair tests.

References

[1] Cushing, S.; Chia, R.; James, A.; Papsin, B. and Gordon, K. (2008): A test of static and dynamic balance function in children with cochlear implants: the vestibular olympics. Archives of Otolaryngology–Head & Neck Surgery, 134(1), 34-38.‏ [2] Jacot, E.; Van Den Abbeele, T.; Debre, H. and Wiener-Vacher, S. (2009): Vestibular impairments pre-and post-cochlear implant in children. International journal of pediatric otorhinolaryngology, 73(2), 209217.‏ [3] Parkes, W.; Gnanasegaram, J.; Cushing, S.; McKnight, C.; Papsin, B. and Gordon, K. (2017): Vestibular evoked myogenic potential testing as an objective measure of vestibular stimulation with cochlear implants. The Laryngoscope, 127(2), E75-E81.

acknowledgement / Contact

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