[Indication and approach of cochlear implantation with common cavity].
OBJECTIVE
To discuss the indication and approach of cochlear implantation with common cavity inner ear malformation.


METHODS
Through imaging examination preoperatively for profound sensorineural hearing loss patients, we found 6 cases with common cavity inner ear malformation, in which cochlear, vestibule and lateral semicircular canal formed a big cavity. Among these cases, five had residual hearing, in the others, residual hearing was not detected.


RESULTS
Among these cases with common cavity, 5 cases with residual hearing were treated with cochlear implantation, in 3 cases we selected round window approach, in the other 2 cases, we implanted the electrodes through the joint of the common cavity and posterior semicircular canal. Postoperatively, All these 5 patients have auditory response with cochlear implantation. The patient without residual hearing was not given cochlear implantation.


CONCLUSIONS
In patients with common cavity inner malformation, those who have residual hearing have indication for cochlear implantation, but it must be emphasized that their effect may not be as good as patients without inner ear malformation. In those patients without residual hearing, cochlear implantation should better not be performed.
Zhang
Daoxing
D
Department of Otorhinolaryngology, Beijing Friendship Hospital, Affiliated to Capital University of Medical Science, China. zdx161154@yahoo.com.cn
Zhang
Yankun
Y
Tian
Hao
H
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003051:Cochlea / Q000002:abnormalities*; D019929:Cochlear Implantation / Q000379:methods; D000075202:Contraindications; D007758:Ear, Inner / Q000002:abnormalities*; D005260:Female; D006801:Humans; D008297:Male; D012665:Semicircular Canals / Q000002:abnormalities*