关键词: 解剖学和组织学, 内窥镜检查, 泪囊鼻腔吻合术, 方法

Abstract: Objective To investigate the effect of endoscopic sinus surgery(ESS) and endoscopic endonasal dacryocystorhinostomy on the nasolacrimal duct and lacrimal sac fossa. Methods Using square caliper, compass and protractor,23 heads of adult cadaver specimens were examined including the shape, direction and the thickness of wall of lacrimal sac fossa. Results In fossa the proportion of the frontal portion of the maxillary bone was bigger than that of the lacrimal bone. There was about 20° between the rear wall of the fossa and the coronal plane. The superior sections of nasolacrimal ducts were circle or sector, there were different directions that each wall of nasolacrimal duct to the hard palate, the front wall of the nasolacrimal duct was thick and the other were thinner, less than 0.2 mm. Conclusion Before the endoscopic endonasal dacryocystorhinostomy was applied,the anterior portion of the medial orbital wall should be scanning, the gap should be enlarged enough, especially in lengthwise；the hiatus maxillaries shouldn′t be enlarged forward too much to avoid injuring nasolacrimal duct.

Key words: anatomy and histology, endoscopy, acryocystorhinostomy, method