Department of Ophthalmology, Aichi Medical University, Nagakute, Aichi, Japan.
Ophthalmic Plast Reconstr Surg. 2013 Mar-Apr;29(2):128-30. doi: 10.1097/IOP.0b013e31827f59f5.
To examine the horizontal orientation of the bony lacrimal passage.
The orbits and bony nasolacrimal canals (BNLCs) from 28 Japanese cadavers (11 men and 17 women; average age at death, 83.6 years; range, 70-99 years) were fixed and exenterated before use. After exposing the posterior halves of the lacrimal fossa (LF) and the BNLC, the authors measured the angles of the longitudinal axes of the LF and the BNLC relative to the sagittal line. Based on these values, the relative horizontal orientation of the LF and the BNLC was determined (ΔBNLC-LF). Positive angles of LF and BNLC were defined when the LF and BNLC were directed laterally against the sagittal line. A positive ΔBNLC-LF was defined as having a greater angle for the LF than for the BNLC.
The mean LF and BNLC angles, and the ΔBNLC-LF were 11.9°, 0.1°, and 11.8°, respectively. The LF inclined laterally against the sagittal plane for all sides and the BNLC ran almost parallel to sagittal plane on average. The BNLC inclined inward against the sagittal line (0° or negative BNLC angle) for 28 sides (50.0%) and inclined outward (positive BNLC angle) for 28 sides (50.0%). The angle of the LF in women was statistically greater than that in men, though no gender BNLC angle or ΔBNLC-LF differences were determined.
The horizontal angle of the bony lacrimal passage differs among individuals, with an equal split between medial and lateral inclinations of the BNLC with reference to the sagittal line.
研究骨性鼻泪管的水平走向。
本研究使用了 28 具日本尸体（11 名男性，17 名女性；平均死亡年龄为 83.6 岁，范围为 70-99 岁）的眼眶和骨性鼻泪管（BNLC）。在使用前，先将这些眼眶和 BNLC 进行固定和掏空。在暴露泪囊窝（LF）和 BNLC 的后段后，作者测量了 LF 和 BNLC 纵轴相对于矢状线的角度。基于这些数值，确定了 LF 和 BNLC 的相对水平方向（ΔBNLC-LF）。当 LF 和 BNLC 指向矢状线的外侧时，定义 LF 和 BNLC 的角度为正。当 LF 的角度大于 BNLC 的角度时，定义为正 ΔBNLC-LF。
平均 LF 和 BNLC 角度和 ΔBNLC-LF 分别为 11.9°、0.1°和 11.8°。LF 倾向于向外侧倾斜，而 BNLC 平均上几乎与矢状面平行。BNLC 向矢状线内侧倾斜（0°或负 BNLC 角度）的有 28 侧（50.0%），向外侧倾斜（正 BNLC 角度）的也有 28 侧（50.0%）。女性 LF 的角度在统计学上大于男性，但未确定性别 BNLC 角度或 ΔBNLC-LF 差异。
骨性鼻泪管的水平角度因人而异，BNLC 相对于矢状线的内侧和外侧倾斜角度相等。
