Abstract: In this stent, two superelastic fine wires are disposed along the axial direction at a prescribed helical pitch so as to have a prescribed stent inner diameter D0, while a pair is formed between two helical fine wires that are disposed across a micro gap of a size not more than five times the wire diameter of the fine wires in such a manner as to include a mutually contacting state.

Abstract: A wire for insertion into intravital tracts applicable even to small-diameter tracts while securing the stream in the tract is to be provided. A capture filter 2 is disposed at the tip of a principal wire 1 consisting of steel filaments. The capture filter 2 is configured of four support wires 3 and a basket-shaped filter body 4 consisting of a meshed material. The filaments constituting the support wires 3 and those constituting the filter body 4 are integrally formed and consist of a superelastic alloy.

Abstract: To provide infusion therapy that can effectively transluminally deliver drugs or the like to a target spot without invading areas other than a diseased area. The infusion therapy is for administering a drug, cells or the like, or inserting a treatment instrument into the target diseased area. A blood vessel area including a bifurcated blood vessel connecting to the diseased area is occluded at the distal and the proximal region thereof to form an occluded area, and the drugs or the like are pumped and supplied to the occluded area, which causes the drugs or the like to flow retrogressively and retentively in the bifurcated blood vessel connecting in the occluded area, and be infused and administered to the diseased area.

Abstract: A balloon catheter for medical treatments easily manufacturable at low cost by a rather simple structure by providing a smaller diameter non-profile balloon catheter by eliminating the need for adhesion and welding of a balloon and eliminating extra profile at a connection part between the balloon and a shaft, wherein PTFE may be used for the shaft, and silicone may be used for the balloon. A inside hollow shaft (3) formed of a balloon material is inserted into an outside hollow shaft (2) formed of a shaft material, and the tip part of the inside hollow shaft (3) is projected from the tip end of the outside hollow shaft (2) to manufacture a double-tube catheter shaft (2). An expandable balloon (5) is formed of the projected portion of the inside hollow shaft (3), a cap (4) is fitted to the tip of the inside hollow shaft (3), and the PTFE is used for the outside hollow shaft (2), with the silicone used for the inside hollow shaft (3).

Abstract: To provide an intraductal foreign body removal instrument which can remove fibrous foreign bodies 80 out of a duct 90 without damaging inner walls of the duct 90 using a simple mechanism. The instrument has a flexible insertion tube 20 inserted in the duct 90, a wire 30 made of flexible wire material and inserted in the insertion tube 20; and a rotating device 40 which rotates the wire 30 in the insertion tube 20. Furthermore, the instrument 10 has a flexible guide tube 25 which is inserted in the duct 90 and into which the insertion tube 20 is inserted loosely.

Abstract: A wire for insertion into intravital tracts applicable even to small-diameter tracts while securing the stream in the tract is to be provided. A capture filter 2 is disposed at the tip of a principal wire 1 consisting of steel filaments. The capture filter 2 is configured of four support wires 3 and a basket-shaped filter body 4 consisting of a meshed material. The filaments constituting the support wires 3 and those constituting the filter body 4 are integrally formed and consist of a superelastic alloy.

Abstract: To provide a catheter and a method for infusion therapy that can effectively transluminally deliver drugs or the like to a target spot without invading areas other than a diseased area. The catheter is a balloon catheter for insertion into a blood vessel in which four lumens extending along an axis are formed in one catheter body, and two balloons are arranged axially in parallel. The plurality of lumens include: an infusion lumen that communicates with an infusion hole between the two balloons; balloon lumens that communicate with insides of the two balloons to expand the balloons; and a guide lumen that also serves as a bypass lumen that communicates with an outside of the catheter body in each position distal and proximal, which is outside of the two balloons with respect to a tip a of the catheter body, and bypasses an occluded area formed by the two balloons to allow blood flow.

Abstract: To provide infusion therapy that can effectively transluminally deliver drugs or the like to a target spot without invading areas other than a diseased area. The infusion therapy is for administering a drug, cells or the like, or inserting a treatment instrument into the target diseased area. A blood vessel area including a bifurcated blood vessel connecting to the diseased area is occluded at the distal and the proximal region thereof to form an occluded area, and the drugs or the like are pumped and supplied to the occluded area, which causes the drugs or the like to flow retrogressively and retentively in the bifurcated blood vessel connecting in the occluded area, and be infused and administered to the diseased area.