Anatomy of Anterior Ethmoidal Foramen, Medial Canthal Tendon, and Lacrimal Fossa for Transcutaneous Anterior Ethmoidal Nerve Block in Japanese Individuals

作者：Takahashi Yasuhiro; Kinoshita Hiroyuki; Nakano Takashi; Asamoto Ken; Ichinose Akihiro; Kakizaki Hirohiko^*

来源：Ophthalmic Plastic and Reconstructive Surgery, 2014, 30(5): 431-433.

DOI：10.1097/IOP.0000000000000215

Purpose: To examine the anatomical relationships of the anterior ethmoidal foramen (AEF), medial canthal tendon (MCT), and lacrimal fossa (LF) in Japanese individuals.
Methods: Thirty-eight orbits from 19 Japanese cadavers (7 men and 12 women; average age at death, 89.3 years) were used in this experimental anatomical study. The AEF, MCT, and superior border of the LF were exposed. The following distances were then measured: 1) from the point at the medial orbital rim directly anterior to the AEF to the superior border of the MCT (AEF-MCT), and 2) from the superior border of the LF to the superior border of the MCT (LF-MCT).
Results: (AEF-MCT) and (LF-MCT) distances were 9.40 +/- 1.92 (mean +/- standard deviation) and 4.21 +/- 1.18 mm, respectively. No values of (LF-MCT) exceeded the mean (AEF-MCT) (9.40 mm).
Conclusions: The transcutaneous anterior ethmoidal nerve block can be reliably performed without injury to the lacrimal sac by inserting a needle approximately 9 mm superior to the superior border of the MCT.

• 出版日期2014-10