SOLID DULL NEEDLE FOR NEEDLE ASSEMBLY

摘要

PROBLEM TO BE SOLVED: To provide a solid dull needle and a needle assembly which enable protection of a user of the needle from needling. SOLUTION: The outer dimension of a solid dull needle 201 is almost equal to the inner dimension of a cannula 303 of a needle so shaped at to let the solid dull needle into the solid dull needle. The solid dull needle 20 blocks a fluid from flowing into a first surrounding part 203 of the inner diameter 307 of the cannula and allows the fluid to flow to the second surrounding part of the inner diameter. The solid dull needle 20 is movable in the longitudinal direction 353 through the cannular 303 and the movement thereof is substantially blocked in the direction 357 vertical to the longitudinal movement.