Abstract: The vascular occlusion balloon catheter has a balloon, a main lumen, and a balloon expanding lumen. The balloon catheter has an air discharge passage. The air discharge passage has a distal end opening located at a position distal from the balloon and a proximal end communicating with an inner portion of the balloon. The distal end opening of the air discharge passage is positioned inside a portion disposed proximally from a distal end of the balloon catheter. The air discharge passage communicates with the main lumen at the distal end opening of the air discharge passage. The area of a cross section of the air discharge passage orthogonal to an axial direction of the balloon catheter is set to 200 ?m2 to 450 ?m2. The length of the air discharge passage is set to 1.0 to 3.0 mm.

Abstract: A branch blood vessel insertion catheter has a catheter body having a lumen penetrating therethrough from a distal end of the catheter body to a proximal end thereof to allow a guide wire to be inserted therethrough. The catheter body has an inner layer, a wire-wound reinforcing member provided on an outer surface of the inner layer, and an outer layer covering both the inner layer and the reinforcing member. The catheter body has a first physical property change point located at a position apart from a distal end of the catheter at a distance of 3.0 to 7.0 mm and a rigidity of a portion of the catheter body located proximally from the first physical property change point is set higher than that of a portion of the catheter body located distally from the first physical property change point.

Abstract: A balloon catheter has an inner tube having a first lumen, an outer tube part coaxial with the inner tube and forming a second lumen between the outer tube part and an outer surface of the inner tube, and a balloon part having a front end portion fixed to a front end portion of the inner tube and an inside communicating with the second lumen. The balloon part has a bulged portion, having an expansion forming mode formed in advance, which is elastically deformable beyond the expansion forming mode by an expansion liquid injected thereinto. The outer tube part has a front side sleeve portion extending from a rear end portion of the bulged portion of the balloon part to a proximal end of the outer tube part, integrally formed with the balloon part using the same material as that of the balloon part, and substantially non-expandable.

Abstract: A branch blood vessel insertion catheter has a catheter body having a lumen penetrating therethrough from a distal end of the catheter body to a proximal end thereof to allow a guide wire to be inserted therethrough. The catheter body has an inner layer, a wire-wound reinforcing member provided on an outer surface of the inner layer, and an outer layer covering both the inner layer and the reinforcing member. The catheter body has a first physical property change point located at a position apart from a distal end of the catheter at a distance of 3.0 to 7.0 mm and a rigidity of a portion of the catheter body located proximally from the first physical property change point is set higher than that of a portion of the catheter body located distally from the first physical property change point.

Abstract: The vascular occlusion balloon catheter has a balloon, a main lumen, and a balloon expanding lumen. The balloon catheter has an air discharge passage. The air discharge passage has a distal end opening located at a position distal from the balloon and a proximal end communicating with an inner portion of the balloon. The distal end opening of the air discharge passage is positioned inside a portion disposed proximally from a distal end of the balloon catheter. The air discharge passage communicates with the main lumen at the distal end opening of the air discharge passage. The area of a cross section of the air discharge passage orthogonal to an axial direction of the balloon catheter is set to 200 ?m2 to 450 ?m2. The length of the air discharge passage is set to 1.0 to 3.0 mm.

Abstract: A liquid medicine injection device has an upper member, a lower member, and a sealing member between both members. The lower member has a part, for pressing a peripheral portion of the sealing member, formed of an upper surface of an annular wall part and an annular edge part at an inner side of the part for pressing the peripheral portion of the sealing member. An upper-surface side of a flange part of the sealing member is pressed by the upper member, and an outer-edge portion of a lower-surface side of the flange part is pressed by the part for pressing the peripheral portion with the annular edge part in penetration into an inner-edge portion of the lower-surface side of the flange part. An outer peripheral surface of the lower end of a part to be inserted into the lower member contacts an inner surface of the annular wall part.

Abstract: A balloon catheter has an inner tube having a first lumen, an outer tube part coaxial with the inner tube and forming a second lumen between the outer tube part and an outer surface of the inner tube, and a balloon part having a front end portion fixed to a front end portion of the inner tube and an inside communicating with the second lumen. The balloon part has a bulged portion, having an expansion forming mode formed in advance, which is elastically deformable beyond the expansion forming mode by an expansion liquid injected thereinto. The outer tube part has a front side sleeve portion extending from a rear end portion of the bulged portion of the balloon part to a proximal end of the outer tube part, integrally formed with the balloon part using the same material as that of the balloon part, and substantially non-expandable.

Abstract: An aspiration catheter includes an aspiration tube and an aspiration lumen extending between and opening to the distal and proximal ends of the aspiration tube, and a guidewire tube bonded to the outer surface of the aspiration tube on a distal end portion of the aspiration tube, with at least a portion of the guidewire tube being parallel to the aspiration tube. A guidewire lumen extends through the guidewire tube and opens at a proximal opening located at a proximal end of the guidewire tube. The outer surface of the aspiration tube has a flat portion where the outer surface is parallel to an axial direction of the aspiration lumen, and the proximal opening of the guidewire lumen is located at the flat portion of the outer surface of the aspiration tube.

Abstract: A blood vessel embolization method includes inserting a balloon catheter into a blood vessel of a human or an animal having a lesion site and disposing a balloon of the balloon catheter at a portion located at a proximal side of the blood vessel and in a neighborhood of the lesion site thereof; shutting off a blood flow in the blood vessel by expanding the balloon; discharging a glucose solution from a distal end of the balloon catheter in a state in which the blood flow in the blood vessel is shut off; discharging a cyanoacrylate-based embolization substance-containing liquid from the distal end of the balloon catheter after the glucose solution injection step; hardening an embolization substance by maintaining a blood flow shut-off state of the blood vessel after the embolization substance injection step; and removing the balloon catheter from the blood vessel after the embolization substance-hardening step.

Abstract: An aspiration catheter includes an aspiration tube and an aspiration lumen extending between and opening to the distal and proximal ends of the aspiration tube, and a guidewire tube bonded to the outer surface of the aspiration tube on a distal end portion of the aspiration tube, with at least a portion of the guidewire tube being parallel to the aspiration tube. A guidewire lumen extends through the guidewire tube and opens at a proximal opening located at a proximal end of the guidewire tube. The outer surface of the aspiration tube has a flat portion where the outer surface is parallel to an axial direction of the aspiration lumen, and the proximal opening of the guidewire lumen is located at the flat portion of the outer surface of the aspiration tube.