Saccular Function in Children with Cochlear Implant

doi:10.7727/wimj.2014.344

Saccular Function in Children with Cochlear Implant

2015-05-21

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DOI：10.7727/wimj.2014.344

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Objective: The aim of this study was to evaluate vestibular evoked myogenic potential (VEMP) in patients with unilateral cochlear implant and normal hearing individuals. Methods: The study group consisted of 20 children (9 girls, 11 boys; mean age 8.70 +/- 2.34 years; range 6-14 years) who underwent unilateral cochlear implantation. As controls, 12 healthy volunteer children (6 girls, 6 boys; mean age 8.91 +/- 2.77 years; range 6-14 years) also participated in the study. Testing of VEMP was performed in cochlear implant patients and in the control group. Results: Vestibular evoked myogenic potential recorded in both ears of control individuals was normal, while VEMP was bilaterally obtained in 10 (50%) patients with cochlear implant. Two children (10%) showed no responses bilaterally. The mean P1 latencies and VEMP thresholds showed significant difference between implanted ears of patients with cochlear implant and the control group (p < 0.05). The mean VEMP thresholds showed significant difference between non-implanted ears of patients with cochlear implant and the control group (p < 0.05). Conclusions: Some patients with cochlear implant show a saccular dysfunction. The addition of the VEMP test to the cochlear implantation test battery may provide useful information about the saccular function before and after surgery.

Keyword:

Cochlear implant

saccule

vestibular evoked myogenic potential

vestibular system

Saccular Function in Children with Cochlear Implant

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