[Surgical approaches and related microsurgical anatomy about suprameatal approach: new surgical approach for cochlear implantation].
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.
Liu
Hanbo
H
Department of Otorhinolaryngology, Affiliated Xiangya Hospital, Central South University, Changsha, 420008, China.
Feng
Yong
Y
Chen
Dengming
D
Mei
Lingyun
L
He
Chufeng
C
Cai
Xinzhang
X
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