[Multi-channel cochlear implantation in patients with common cavity malformation].
OBJECTIVE
To report the multi-channel cochlear implantation in patients with Common cavity malformation, including surgeries, pre and postoperative hearing assessments as well as outcomes of speech recognition.


METHODS
Multi-channel cochlear implantation surgeries have been performed in 6 cases with common cavity malformation in our hospital from May 1995 to May 2002. The transmastoid lateral semicircular canal approach was used in these cases. The postoperative outcomes of these cases are compared with 6 cases of non-malformed cochlea as a control group.


RESULTS
Among the 6 cases, All 32 electrodes were inserted in 3 cases, 28 electrodes in 1 cases, 26 electrodes in 1 cases, 22 electrodes in 1 cases. The intra and postoperative complications of the surgeries have no significant difference compared with the surgeries of normal cochlea. The intraoperative "Ozze" occurred in 2 cases, the small CSF flowing occurred in 3 cases and no CSF flowing occurred in 1 case. Postoperative threshold in sound field were 30-40 dB recovery for all cases, and similar to the normal cochlea cases. Most of them received the similar hearing and speech recovery, compared with the result of non-malformed group. Only a few had a higher hearing threshold. The remote effect will be evaluated by long-term follow-up.


CONCLUSIONS
Multi-channel cochlear implantation could be performed in the cases with common cavity malformation, but preoperative hearing assessments and proper images should be done.
Department of Otolaryngology, Peking Union Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100730.
Lińe
L
Wang
Keli
K
Cao
Chaogang
C
Wei
Zhiyong
Z
Zhang
Zhenyu
Z
Zheng
Xiaowei
X
Chen
Yi
Y
Wang
D002648:Child; D002675:Child, Preschool; D003051:Cochlea / Q000002:abnormalities*; D019929:Cochlear Implantation / Q000379:methods*; D003054:Cochlear Implants; D005260:Female; D006309:Hearing; D006801:Humans; D007223:Infant; D008297:Male; D012665:Semicircular Canals / Q000601:surgery