[A binding study of the gross and endoscopic anatomy of optic canal].
OBJECTIVE
To provide transnasal endoscopic optic nerve decompression with the anatomic reference.


METHODS
Ten (20 sides) damp cadaveric heads of Chinese adults were cut sagittally along the midlines. The distance and angle between optic canal and anterior nasal spine were measured by ruler and protractor. Five (10 sides) damp cadaveric heads (including 2 children's) were undergone endoscopic dissection, and the optic canal and its related structure were observed.


RESULTS
From the study of gross anatomy, the specific structure of optic canal and internal carotid artery were found. The mean length of the medial wall of optic canal was (9.12 +/- 1.89) mm. The mean diameter of the optic canal orbital aperture was (4.12 +/- 0.53) mm. The distances from the midpoint of the medial wall of optic canal orbital aperture to anterior nasal spine was (61.22 +/- 6.23) mm, and the angle from the midpoint of the medial wall of optic canal orbital aperture to anterior nasal spine was (45.3 +/- 4.5) degrees. From the study of endoscopic anatomy, optic canal, looking like a light-reflective band, was alone optic canal orbital aperture posteriorly. Obvious prominence could be found in 7 sides (70%), while not been seen clearly in 3 sides (30%).


CONCLUSIONS
The binding study of the gross and endoscopic anatomy of optic canal help us to recognize optic canal accurately under nasal endoscope, which can improve the veracity of transnasal endoscopic optic nerve decompression.
Zhang
Qinxiu
Q
Department of Otolaryngology, West China Hospital, Sichuan University, Chengdu, 610041, China.
Zou
Jian
J
Wang
Guanghui
G
Qin
Gang
G
Liu
Shixi
S
D000328:Adult; D000718:Anatomy, Regional; D002648:Child; D019299:Decompression, Surgical; D004724:Endoscopy; D006801:Humans; D009900:Optic Nerve / Q000033:anatomy & histology* / Q000601:surgery*