A duct for tear flow, for connecting the nasal cavity and the lacrimal sac, comprises: a tube, which is set across the nasal mucosa, nasal bone wall and lacrimal sac mucosa, so that the nasal cavity and the lacrimal sac are connected a positioning element, set on the front of the tube, and fastened on the lacrimal sac mucosa so that tears flow into the nasal cavity due to a connection between the nasal cavity and the lacrimal sac.一種輔助排淚管,用於連通鼻腔及淚囊,其中包括:一管體,管體穿置於鼻腔黏膜、骨壁及淚囊黏膜之上,藉以連通鼻腔及淚囊;一定位元件,設於管體之前端,並卡設於淚囊黏膜上;藉管體連通鼻腔及淚囊,可達到使淚囊內之淚水流入鼻腔之目的。100‧‧‧輔助排淚管101‧‧‧鼻腔102‧‧‧淚囊
