[Applied anatomy study of optic canal by transnasal endoscopy].

Objective: To provide transnasal endoscopic optic canal decompression with the anatomic reference.

Method: 15 samples of the adult corpse wet specimen (30 sides for the optic canal) were examined under the endoscope to scrutinize the regional anatomy of the optic canal.

Result: distance between the spina nasalis anterior and the midpoint of optic canal medial wall is (61.02 +/- 5.83) mm, and the angle between spina nasalis anterior and the midpoint of optic canal medial wall is (45.1 +/- 4.81) degrees. The medial wall of optic canal is longest, with an average length of (11.61 +/- 1.58) mm; the lateral wall of optic canal is thickest, and the medial wall thinnest. 10 traumatic blind patient underwent endoscopic optic canal decompression with satisfactory outcome.

Conclusion: The regional anatomy of the optic canal under endoscope is of importance to endoscopic optic canal decompression. Which is microinvasive with direct approach and clear view thus is widely used in clinical practice.