Abstract: Provided is an intraluminal foreign object capturing tool with which it is possible to cause a capturing member for capturing a foreign object to expand to an appropriate diameter. The foreign object capturing tool, in order to capture a foreign object in a lumen, includes: a core wire; a capturing member which is disposed movably outside the core wire, has a farthest tip-end which is movement-regulated at a predetermined position of the core wire, and expands in diameter by contracting axially; a tubular member which is disposed outside the core wire on a base end side of the capturing member, and which regulates movement of capturing member on the base end side; and control members which are disposed outside the core wire and inside the capturing member, and which regulate the amount of axial contraction of the capturing member. As the tubular member and the core wire are moved relative to each other, the capturing member contracts axially by a length regulated by the control member and expands in diameter.

Abstract: A microcatheter for infusion in which a tip portion of its shaft 2 comprises a porous tubular structure 3 having no communicating pores is provided. It can be inserted into fine peripheral blood vessels along a guiding wire and/or on a blood stream, and thus a contrast medium, a curative drug, an embolismic substance or the like can be infused in the desired portion.