Abstract: A guidewire suppresses an increase in operating resistance during pushing and pulling within a blood vessel that is extremely crooked and secures sufficient operability. The guidewire includes a core shaft and a coil body wound around the core shaft. The core shaft includes a first shaft portion positioned inside the coil body and a second shaft portion positioned proximally from the coil body. A twisted portion that is twisted along a longitudinal axis of the core shaft is provided in at least part of the second shaft portion.

Abstract: A shaft suppresses a permanent set, or plastic deformation, even when inserted into an extremely winding blood vessel. A guidewire incorporates the above shaft. The shaft is twisted along its longitudinal axis and has a cross section forming a substantially rectangular shape extending in a first direction perpendicular to the longitudinal axis. The cross section has at least one arcuate recess.

Abstract: A shaft suppresses a rise in operation resistance as it is pushed and pulled even inside an extremely winding blood vessel and thus secures sufficient torque transmission characteristics and operability. A guidewire may employ the above-described shaft. The shaft is twisted along its longitudinal axis and has a cross section that forms a substantially rectangular shape in a direction perpendicular to the longitudinal axis. Moreover, the cross section of the shaft has a projection that projects arcuately.

Abstract: A guidewire suppresses an increase in operating resistance during pushing and pulling within a blood vessel that is extremely crooked and secures sufficient operability. The guidewire includes a core shaft and a coil body wound around the core shaft. The core shaft includes a first shaft portion positioned inside the coil body and a second shaft portion positioned proximally from the coil body. A twisted portion that is twisted along a longitudinal axis of the core shaft is provided in at least part of the second shaft portion.

Abstract: A guide wire has excellent flexibility of a distal portion thereof, followability for a blood vessel and the like and transmutability of delicate interactions such as resistance produced when the distal portion slides in contact with a wall surface of a blood vessel and the like, and resistance produced when the distal portion bumps against a stenosed section and the like. The guide wire has a core shaft and a coil body covering a distal portion of the core shaft, the coil body being formed by helically winding a stranded wire having three or more elemental wires interwound together, and the stranded wire being hollow and having a first void at the center thereof.

Abstract: A coil body has high flexibility, satisfactorily tracks a complicated shape, and remarkably transmits fine vibrations occurring on a part of the coil body. A guide wire uses the coil body. The coil body is formed by helically winding a stranded wire including a plurality of stranded element wires. The stranded wire has a first gap as a hollow at the center of the stranded wire.

Abstract: Provided is a guidewire including a core shaft, an outer flexible tube, a stranded wire that extends parallel to the core shaft, and a hollow stranded-wire coil disposed in the outer flexible tube. The hollow stranded-wire coil is formed of multiple strands and surrounds the distal end portion of the core shaft and the stranded wire. Distal ends of the hollow stranded-wire coil, the core shaft, and the stranded wire are joined to a distal end of the outer flexible tube.

Abstract: A shaft suppresses a permanent set, or plastic deformation, even when inserted into an extremely winding blood vessel. A guidewire incorporates the above shaft. The shaft is twisted along its longitudinal axis and has a cross section forming a substantially rectangular shape extending in a first direction perpendicular to the longitudinal axis. The cross section has at least one arcuate recess.

Abstract: A shaft suppresses a rise in operation resistance as it is pushed and pulled even inside an extremely winding blood vessel and thus secures sufficient torque transmission characteristics and operability. A guidewire may employ the above-described shaft. The shaft is twisted along its longitudinal axis and has a cross section that forms a substantially rectangular shape in a direction perpendicular to the longitudinal axis. Moreover, the cross section of the shaft has a projection that projects arcuately.

Abstract: Provided is a guidewire including a core shaft, an outer flexible tube, a stranded wire that extends parallel to the core shaft, and a hollow stranded-wire coil disposed in the outer flexible tube. The hollow stranded-wire coil is formed of multiple strands and surrounds the distal end portion of the core shaft and the stranded wire. Distal ends of the hollow stranded-wire coil, the core shaft, and the stranded wire are joined to a distal end of the outer flexible tube.

Abstract: Provided is a guidewire including a core shaft, an outer flexible tube, a stranded wire that extends parallel to the core shaft, and a hollow stranded-wire coil disposed in the outer flexible tube. The hollow stranded-wire coil is formed of multiple strands and surrounds the distal end portion of the core shaft and the stranded wire. Distal ends of the hollow stranded-wire coil, the core shaft, and the stranded wire are joined to a distal end of the outer flexible tube.

Abstract: Provided is a guidewire including a core shaft, an outer flexible tube, and an inner flexible tube that surrounds a distal end portion of the core shaft. The inner flexible tube is disposed in the outer flexible tube so that a distal end thereof is positioned between the distal end of the core shaft and a proximal end of the core shaft so as to be separated from the core shaft. A first joint is formed so as to join the distal end of the inner flexible tube to the core shaft. At least one second joint is formed so as to join the outer flexible tube to the inner flexible tube. The at least one second joint is positioned between the first joint and the proximal end of the core shaft.

Abstract: A coil-type guidewire includes a core shaft, a coil body, and a plurality of bonding portions that bond the core shaft and the coil body to each other. At least one loosely wound coil portion is provided in at least one of regions bounded by the bonding portions, and densely wound coil portions are disposed near the bonding portions.

Abstract: Provided is a guidewire including a core shaft, an outer flexible tube, a stranded wire that is disposed parallel to a distal end portion of the core shaft, and an inner flexible tube that surrounds a distal end portion of the core shaft and the stranded wire. The inner flexible tube is disposed in the outer flexible tube so that a distal end thereof is positioned between the distal ends of the core shaft and the stranded wire and a proximal end of the core shaft so as to be separated from the distal ends of the core shaft and the stranded wire. A joint is formed so as to join the distal end of the inner flexible tube, the core shaft, and the stranded wire to each other.

Abstract: In a medical equipment, a hollow shaft body is made of single-wound or plurally-wound coil line elements, and has a cylindrical tip portion formed on a distal end of the hollow shaft body, and a manipulative grip connected to a proximal side portion of the hollow shaft. At least one of an inner surface mid an outer surface of the hollow shaft, and at least one of an inner surface and outer surface of the tip portion are provided with a screw-like concave-convex streak of projection. The hollow shaft body has a diameter-reduced portion at the manipulative grip having a transparent portion, through which the diameter reduced portion is visible from outside.

Abstract: A catheter has an intermediate layer with a constant thickness in first and second adjacent portion, and the adhesive strength between the intermediate layer and an inner layer is uniform. When the catheter is curved, the movement of a braid caused by the curving of the catheter can be uniformly suppressed within the adjacent first and second portions. Even if, when the catheter is curved, a tensile stress towards a proximal end acts upon a first outer layer at the first portion and a tensile stress towards a distal end acts upon a second outer layer at the adjacent second portion, the first and second outer layers are caught by an uneven contour of the intermediate layer by an anchor effect, so that it is possible to prevent peeling of the first and second outer layers from the intermediate layer.

Abstract: A guidewire includes a core shaft, and a coiled body wound around the outer circumferential surface of the core shaft. A bulged portion is provided at the tip portion of the core shaft. The front end of the coiled body is bonded to the front end of the core shaft with a bonding portion. The bonding portion is provided to enclose the bulged portion provided at the tip portion of the core shaft.

Abstract: Provided is a guidewire including a core shaft, an outer flexible tube, and an inner flexible tube that surrounds a distal end portion of the core shaft. The inner flexible tube is disposed in the outer flexible tube so that a distal end thereof is positioned between the distal end of the core shaft and a proximal end of the core shaft so as to be separated from the core shaft. A first joint is formed so as to join the distal end of the inner flexible tube to the core shaft. At least one second joint is formed so as to join the outer flexible tube to the inner flexible tube. The at least one second joint is positioned between the first joint and the proximal end of the core shaft.

Abstract: A guidewire includes a core shaft, and a coiled body wound around the outer circumferential surface of the core shaft. A bulged portion is provided at the tip portion of the core shaft. The front end of the coiled body is bonded to the front end of the core shaft with a bonding portion. The bonding portion is provided to enclose the bulged portion provided at the tip portion of the core shaft.

Abstract: Provided is a guidewire including a core shaft, an outer flexible tube, and an inner flexible tube that surrounds a distal end portion of the core shaft. The inner flexible tube is disposed in the outer flexible tube so that a distal end thereof is positioned between the distal end of the core shaft and a proximal end of the core shaft so as to be separated from the core shaft. A first joint is formed so as to join the distal end of the inner flexible tube to the core shaft. At least one second joint is formed so as to join the outer flexible tube to the inner flexible tube. The at least one second joint is positioned between the first joint and the proximal end of the core shaft.