Assessment of the horizontal semicircular canal function after cochlear implantation by video head impulse test and caloric test.
10.13201/j.issn.1001-1781.2018.02.002
- Author:
Jie ZENG
1
;
Hong Ming HUANG
2
;
Xiao Qian WANG
2
;
Kai Bang ZHONG
2
;
Pei Na WU
1
Author Information
1. The Second Clinical Medical College,Southern Medical University Guanzhou,510515,China Department of Otorhinolaryngology Head and Neck Surgery,Guangdong General Hospital,Guangdong Academy of Medical Science.
2. Department of Otorhinolaryngology Head and Neck Surgery,Guangdong General Hospital,Guangdong Academy of Medical Science.
- Publication Type:Journal Article
- Keywords:
caloric test;
cochlear implantation;
head impulse test;
horizontal semicircular canal
- MeSH:
Caloric Tests;
Cochlear Implantation;
adverse effects;
methods;
Head Impulse Test;
Humans;
Semicircular Canals;
physiopathology;
Vertigo
- From:
Journal of Clinical Otorhinolaryngology Head and Neck Surgery
2018;32(2):86-90
- CountryChina
- Language:Chinese
-
Abstract:
To analyze the functional change of horizontal semicircular canals after cochlear implantation.Eighteen patients were enrolled in this study.Their vestibular function was evaluated by using the caloric test and video head impulse test before and one week,one month after CI surgery,respectively.The unilateral weakness(UW),slow phase velocity(SPV)in caloric test and gain in video head impulse test(vHIT-G)were observed.Caloric test was abnormal when UW>25% or SPV mean<6°/s,while vHIT was abnormal when vHIT-G<0.8.The SPV of the implanted ear were[(10.36±8.01)°/s;(14.77±14.24)°/s]pre-operatively,[(6.45±7.52)°/s;(5.14±4.67)°/s]1 week post-operatively and[(6.05±3.86)°/s;(6.27±4.17)°/s]1 month post-operatively.Statistically significant difference(<0.05)was found between pre-and post-operative period.The vHIT-G of the implanted ear were(0.73±0.33)pre-operatively,(0.65±0.32)1 week post-operatively and(0.71±0.36)1 month post-operatively.There was no statistically significant difference of vHIT-G between preand post-operative period((pre-operative/1 week post-operative)=0.084,(pre-operative/1 month post-operative)=0.679).Four patients presented with vertigo and one of them manifested slight unsteadiness post-operatively.All symptoms resolved within 7 days.These symptoms had no correlate with age,gender,implantedear and results of vestibular test.Cochlear implantation can affect the horizontal semicircular canal function,and the video head impulse test and caloric test should be used in a complementary fashion.
