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为了减少或避免易内鼻窦手术损伤泥道，在20具成人尸头标本上，观测泪道与鼻腔外侧壁的毗邻关系。发现前筛气房与泪囊窝关系密切，气房侵及泪骨占87．5％；鼻泪管与钩突上端游离线之间距离为6.74±1．72mm，距离筛漏斗前界3．44±0．75mm，距上颌窦鼻内开口为5．50±3．73mm。鼻泪管开四位于下鼻道前端鼻甲附着处。研究表明，前筛房、钩突切除和上颌窦鼻内开窗手术范围，如果过于向前，容易损伤泪道。
In order to reduce or avoid intra-sinus surgery injury muddy, 20 adult cadaver specimens were observed adjacent to the nasal cavity and lacrimal duct adjacent to the relationship. It was found that the pre-screening room was closely related to the dacryocystorhinus, accounting for 87.5% of the total lacrimal gland invasion. The distance between the nasolacrimal duct and the upper extremity of the nasolacrimal duct was 6.74 ± 1.72 mm, 3 from the front of the sieve funnel. 44 ± 0.75mm, from the maxillary sinus nasal opening was 5.50 ± 3.73mm. Nasolacrimal duct open four nasal passages in the inferior nasal obstruction. Studies have shown that the former screening room, uncinate process and maxillary sinus intranasal fenestration surgery range, if too much forward, easy to damage the lacrimal duct.