LACRIMAL DUCT TUBE

摘要

A lacrimal duct tube including: a pair of tubular members each of which has an terminal end opening at one end; and a central member that connects other ends of the tubular members, at least one of the tubular members includes: a cylindrical part extended from the terminal end opening to the central member side and has an opening for bar-like operative instrument at an end portion at the central member side; and an arc-shaped part that is extended from the end portion of the cylindrical part at the central member side further to the central member side and has an almost arc-shaped wall portion on a cross section orthogonal to a longitudinal side of the tubular member, and the almost arc-shaped wall portion is formed at the arc-shaped part continuously over a length of ⅓ or more and 9/10 or less of an entire length of the tubular member.

主权项

1. A lacrimal duct tube slidable along a bar-like operative instrument, comprising:
a pair of tubular members each of which has a terminal end opening at one end; and a central member that connects other ends of the tubular members, wherein at least one of the tubular members includes: a cylindrical part that is extended from the terminal end opening to the central member side and has an opening for bar-like operative instrument at an end portion at the central member side; and an arc-shaped part that is extended from the end portion of the cylindrical part at the central member side further to the central member side and has an almost arc-shaped wall portion on a cross section orthogonal to a longitudinal side of the tubular member, and the almost arc-shaped wall portion is formed at the arc-shaped part continuously over a length of ⅓ or more and 9/10 or less of an entire length of the tubular member.