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目的：为鼻内窥镜下泪囊鼻腔造口术提供解剖学基础。方法：在３０侧成人头部正中矢状剖面标本上，观测了泪囊的形态、毗邻、在鼻腔外侧壁上的投影及泪囊窝内侧壁骨质厚度。以鼻小柱基部为基准，鼻腔底为平面，对泪囊进行了定位。结果：泪囊的长度为１３．３±２．２ｍｍ，内侧壁宽为６．０±１．１ｍｍ，横径为４．９±０．９ｍｍ，容积为０．３３±０．０７ｍｌ。从鼻小柱基部至泪囊下部和顶部的距离分别为３２．８±３．７ｍｍ和４３．４±４．３ｍｍ，两者与鼻腔底的夹角分别为４７．５°±３．６°和６５．６°±５．１°。结论：提出了泪囊鼻腔造口术时内窥镜进入深度和角度的安全范围，造口位置的选择及手术并发症的预防
Objective: To provide an anatomical basis for nasal dacryocystorhinostomy under nasal endoscopy. Methods: The shape of the lacrimal sac, adjacent to the projection on the lateral wall of the nasal cavity, and the thickness of the lateral wall of the dacryocystorhinoma were observed on the median sagittal section of 30 adult head. Based on the base of the columella, the bottom of the nasal cavity was flat and the lacrimal sac was located. Results: The length of the lacrimal sac was 13.3 ± 2.2 mm, the width of the medial wall was 6.0 ± 1.1 mm, the transverse diameter was 4.9 ± 0.9 mm and the volume was 0.33 ± 0.07 ml. The distances from the base of columella to the lower part and top of the dacryocyst were 32.8 ± 3.7mm and 43.4 ± 4.3mm, respectively, and the angles between them were 47.5 ° ± 3.6 ° And 65.6 ° ± 5.1 °. CONCLUSIONS: A safe range of depth and angle of endoscopic dacryocystorhinostomy is proposed, the choice of ostomy position and the prevention of surgical complications