Abstract: A light irradiating medical device 1 includes a catheter shaft 2 extending in a longitudinal direction; a balloon 5 disposed at a distal portion of the catheter shaft 2; a light guiding tool 10 disposed in a lumen of the catheter shaft 2 and movable in the longitudinal direction, the light guiding tool 10 including an optical fiber 11 extending in the longitudinal direction and a tubular member 15 covering the optical fiber 11 and having light transparency, the optical fiber 11 including a core 12, a cladding 13 and a cladding absent portion 14 disposed at a part of a distal portion of the core 12; a first radiopaque marker 21 disposed at the distal portion of the catheter shaft 2; and a second radiopaque marker 22 disposed at the tubular member 15 at a position distal to a distal end 12a of the core 12.

Abstract: A light irradiation medical device comprising: a shaft having a lumen extending in the longitudinal direction; and a light guiding device that is disposed in the lumen of the shaft and is movable in the longitudinal direction. The light guiding device extends in the longitudinal direction and has a light diffusion part at a distal part of the light guiding device. The shaft has: a first window in a peripheral wall of a distal part of the shaft; and a second window at a distal end face of the shaft. The shaft has a reflection surface inside the shaft and at a distal side with respect to the first window, and reflects light emitted from the light guiding device.

Abstract: A balloon catheter (1) comprising: a first shaft (10) having a first lumen (11) and a second lumen (12); a second shaft (20) located distal to the first shaft (10); a balloon (30) located distal to the second shaft (20); and an optical fiber (40) disposed inside the balloon (30); wherein: the first shaft (10) is made of a resin; a cross-sectional area of the resin forming the first shaft (10) is larger than a cross-sectional area of either the first lumen (11) or the second lumen (12), which has a larger cross-sectional area, in a cross section perpendicular to a longitudinal direction; the optical fiber (40) is joined to a distal end (11d) of the first lumen (11); a proximal end (30p) of the balloon (30) is joined to the second shaft (20); and a distal end (30d) of the balloon (30) is joined to the optical fiber (40).

Abstract: A balloon catheter comprising: a first shaft having a first lumen and a second lumen; a second shaft located distal to the first shaft; a balloon located distal to the second shaft; and a tubular member that is disposed inside the balloon and has a light transmittance of 90% or more; wherein: the first shaft is made of a resin; a cross-sectional area of the resin forming the first shaft is larger than a cross-sectional area of either the first lumen or the second lumen, which has a larger cross-sectional area, in a cross section perpendicular to a longitudinal direction; a proximal end of the tubular member is joined to a distal end of the first lumen; a proximal end of the balloon is joined to the second shaft; and a distal end of the balloon is joined to the tubular member.

Abstract: A light irradiating medical device comprising: a shaft extending in a longitudinal axis direction thereof and having a lumen extending in the longitudinal axis direction; a first tubular member disposed in the lumen of the shaft and rotatable about a rotation axis parallel to the longitudinal axis direction of the shaft, the first tubular member having a window located in a part of a peripheral wall of a distal portion; and a light guiding tool disposed in a lumen of the first tubular member and movable in the longitudinal axis direction, the light guiding tool including an optical fiber extending in the longitudinal axis direction, the optical fiber including a core, a cladding coating a radially outer portion of the core, and a cladding-absent portion located at a part of a distal portion of the core, and the window allowing passage therethrough of output light from the light guiding tool.

Abstract: A light irradiating medical device 1 includes a catheter shaft 2 extending in a longitudinal direction; a balloon 5 disposed at a distal portion of the catheter shaft 2; a light guiding tool 10 disposed in a lumen of the catheter shaft 2 and movable in the longitudinal direction, the light guiding tool 10 including an optical fiber 11 extending in the longitudinal direction and a tubular member 15 covering the optical fiber 11 and having light transparency, the optical fiber 11 including a core 12, a cladding 13 and a cladding absent portion 14 disposed at a part of a distal portion of the core 12; a first radiopaque marker 21 disposed at the distal portion of the catheter shaft 2; and a second radiopaque marker 22 disposed at the tubular member 15 at a position distal to a distal end 12a of the core 12.

Abstract: A method for producing an in-vivo indwelling member includes a step of winding a metal wire (1) to form a primary coil (2-4), a step of giving the primary coil (2-4) a shape to form a secondary coil (10-19), and a step of inserting the secondary coil (10-19) into an inner hollow section (43) of a shaping mold (40). The secondary coil (10-19) includes different patterns such as a helical shape (20, 22-25, 29, 61, 63-65), a linear shape (21, 26, 28), and a circular arc shape (27, 50-53, 60, 62). When the secondary coil (10-19) is pushed into the inner hollow section (43), the secondary coil (10-19) makes contact with the inner wall surface of the inner hollow section (43), and a portion between different patterns is randomly curved. Accordingly, the in-vivo indwelling member has a three-dimensional structure that corresponds to the shape of the inner hollow section (43). The in-vivo indwelling member is less likely to deviate from the inside of an aneurysm when released into the aneurysm.

Abstract: A method for producing an in-vivo indwelling member includes a step of winding a metal wire (1) to form a primary coil (2-4), a step of giving the primary coil (2-4) a shape to form a secondary coil (10-19), and a step of inserting the secondary coil (10-19) into an inner hollow section (43) of a shaping mold (40). The secondary coil (10-19) includes different patterns such as a helical shape (20, 22-25, 29, 61, 63-65), a linear shape (21, 26, 28), and a circular arc shape (27, 50-53, 60, 62). When the secondary coil (10-19) is pushed into the inner hollow section (43), the secondary coil (10-19) makes contact with the inner wall surface of the inner hollow section (43), and a portion between different patterns is randomly curved. Accordingly, the in-vivo indwelling member has a three-dimensional structure that corresponds to the shape of the inner hollow section (43). The in-vivo indwelling member is less likely to deviate from the inside of an aneurysm when released into the aneurysm.

Abstract: Disclosed herein is a medical wire with an intracorporeally indwelling member connected to the leading end part of a conductive wire through a thermally-fusible connecting member, wherein the contact of the leading end part of the conductive wire with the intracorporeally indwelling member can be surely prevented even when the connecting member is deformed. The medical wire comprises a conductive wire and an intracorporeally indwelling member connected to the leading end part of the conductive wire through a thermally-fusible connecting member, in which the connecting member is heated and fused by a high-frequency current supplied through the conductive wire, thereby releasing the intracorporeally indwelling member, wherein a non-conductive spacer for preventing the contact of the intracorporeally indwelling member with the conductive wire is provided between them.

Abstract: Disclosed herein is a medical wire with an intracorporeally indwelling member connected to the leading end part of a conductive wire body through a thermally-fusible connecting member, wherein expected heat generation can be achieved even when a conductive member that causes leak comes into contact with the leading end part of the conductive wire body, and thus the intracorporeally indwelling member can be surely released.

Abstract: Disclosed herein is a medical wire with an intracorporeally indwelling member connected to the leading end part of a conductive wire body through a thermally-fusible connecting member, wherein expected heat generation can be achieved even when a conductive member that causes leak comes into contact with the leading end part of the conductive wire body, and thus the intracorporeally indwelling member can be surely released.

Abstract: Disclosed herein is a medical wire with an intracorporeally indwelling member connected to the leading end part of a conductive wire through a thermally-fusible connecting member, wherein the contact of the leading end part of the conductive wire with the intracorporeally indwelling member can be surely prevented even when the connecting member is deformed. The medical wire comprises a conductive wire and an intracorporeally indwelling member connected to the leading end part of the conductive wire through a thermally-fusible connecting member, in which the connecting member is heated and fused by a high-frequency current supplied through the conductive wire, thereby releasing the intracorporeally indwelling member, wherein a non-conductive spacer for preventing the contact of the intracorporeally indwelling member with the conductive wire is provided between them.

Abstract: As a therapy for angiostenosis, angioplasty (PTA, PTCA), in which a small balloon is inflated in a blood vessel to expand the vessel, has been widely practiced as a minimally invasive treatment. In this therapy, however, repeated stenosis (restenosis) occurs at a high incidence. In order to reduce the restenosis rate, procedures that use indwelling stents have gained popularity in recent years. However, restenosis has been reported in about 20% to 30% of stent placement cases. Although attempts have been made to coat the stent with a drug that regulates occlusion, stenosis still occurs at a high frequency. At least two layers including an immunosuppressant-containing layer and an antiinflammatory agent-containing layer are provided on the surface of an indwelling stent.