Patent ID: 10070991

Abstract:
A lacrimal duct tube includes: a pair of tubular members that each have at one end an opening communicating with a lumen and have in a wall a hole for guiding a lacrimal duct tube operative instrument to the lumen; and a connection member that connects the other ends of the tubular members. Surfaces of the tubular members include a hydrophilic-coated portion and a non-coated portion without the hydrophilic coating. It is preferred that the lumen in the vicinity of the opening includes an engagement portion for engagement with a tip of the lacrimal duct tube operative instrument, and the non-coated portion is formed without overlapping with the surface of the tubular member at the position of the engagement portion. The lacrimal duct tube can be used favorably for various lacrimal duct obstruction treatments. In the case of using a sheath such as in sheath guided endoscopic probing, the lacrimal duct tube can be easily inserted into the sheath and be firmly fixed to the sheath. In the case of inserting the lacrimal duct tube directly into the lacrimal duct, the lacrimal duct tube can be easily passed through the lacrimal duct and be easily operated in the lacrimal duct.