title: [Indication and approach of cochlear implantation with common cavity].
abstract: 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.
authors.affiliation: Department of Otorhinolaryngology, Beijing Friendship Hospital, Affiliated to Capital University of Medical Science, China. zdx161154@yahoo.com.cn
authors.forename: Daoxing
authors.initials: D
authors.lastname: Zhang
authors.forename: Yankun
authors.initials: Y
authors.lastname: Zhang
authors.forename: Hao
authors.initials: H
authors.lastname: Tian
mesh_terms: 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*