title: [Surgical approaches and related microsurgical anatomy about suprameatal approach: new surgical approach for cochlear implantation].
abstract: OBJECTIVE
  To study a new surgical approach for cochlear implantation.
  
  
  METHODS
  We operated on 8 cadaver heads (16 side) use Suprameatal approach for cochlear implantation, describe related anatomic mark.
  
  
  RESULTS
  The electrode is passed through the suprameatal tunnel, the EAC groove, the space underneath the chorda tympani between the malleal and the long process of the incus, and the cochleostomy. Angle between tunnel and temporal imaginary line is 28.0 degrees +/- 1.3 degrees in adult, 29.0 degrees +/- 1.7 degrees in children, the location of inserting electrode into cochleostomy is (1.31 +/- 0.13) mm to round window in adult, (1.19 +/- 0.12) mm in child.
  
  
  CONCLUSIONS
  The SMA approach is a safe technique, maintaining a safe distance to facial nerve and chorda tympani. So We should make right decision in clinic.
authors.affiliation: Department of Otorhinolaryngology, Affiliated Xiangya Hospital, Central South University, Changsha, 420008, China.
authors.forename: Hanbo
authors.initials: H
authors.lastname: Liu
authors.forename: Yong
authors.initials: Y
authors.lastname: Feng
authors.forename: Dengming
authors.initials: D
authors.lastname: Chen
authors.forename: Lingyun
authors.initials: L
authors.lastname: Mei
authors.forename: Chufeng
authors.initials: C
authors.lastname: He
authors.forename: Xinzhang
authors.initials: X
authors.lastname: Cai
mesh_terms: D000328:Adult; D002648:Child; D002814:Chorda Tympani Nerve / Q000033:anatomy & histology; D019929:Cochlear Implantation / Q000379:methods*; D004424:Ear Canal / Q000033:anatomy & histology* / Q000601:surgery; D005154:Facial Nerve / Q000033:anatomy & histology; D006801:Humans; D012405:Round Window, Ear / Q000033:anatomy & histology