Abstract: A guide wire includes a core shaft having an elongated outer shape, a first coil body disposed to surround a distal end portion of the core shaft, a second coil body disposed radially outside from the first coil body, and a distal tip fixing a distal end of the core shaft and a distal end of the first coil body. In the longitudinal direction of the core shaft, a distal end of the second coil body is positioned between the distal end of the first coil body and a proximal end of the first coil body, a proximal end of the second coil body is positioned on the more proximal end side than the proximal end of the first coil body, and bending stiffness of the first coil body is smaller than bending stiffness of the second coil body.

Abstract: A guide wire of the present disclosure includes a core shaft having a distal end portion decreasing in cross-sectional area, a coil body wound to cover the distal end portion, and a distal end fixing portion fixing the core shaft and the coil body to each other. The distal end portion includes a small cross-sectional area portion, a large cross-sectional area portion, and a tapered portion between the small cross-sectional area portion and the large cross-sectional area portion. The core shaft and the coil body are fixed at a portion excluding the tapered portion. A first bending rigidity FR1 of the large cross-sectional area portion, a second bending rigidity FR2 of the small cross-sectional area portion, and a length L of the tapered portion satisfy the following expressions (1) and (2). In the following expressions (1) and (2), the unit of L is mm (millimeter). (FR1/FR2)0.25/L?0.

Abstract: A guide wire of the present disclosure includes a core shaft having a distal end portion decreasing in cross-sectional area, a coil body wound to cover the distal end portion, and a distal end fixing portion fixing the core shaft and the coil body to each other. The distal end portion includes a small cross-sectional area portion, a large cross-sectional area portion, and a tapered portion between the small cross-sectional area portion and the large cross-sectional area portion. The core shaft and the coil body are fixed at a portion excluding the tapered portion. A first bending rigidity FR1 of the large cross-sectional area portion, a second bending rigidity FR2 of the small cross-sectional area portion, and a length L of the tapered portion satisfy the following expressions (1) and (2). In the following expressions (1) and (2), the unit of L is mm (millimeter). (FR1/FR2)0.25/L?0.

Abstract: A guide wire of the present disclosure includes a core shaft having a distal end portion decreasing in diameter, a coil body wound to cover the distal end portion, and a distal end fixing portion fixing the core shaft and the coil body to each other. The distal end portion includes a small diameter portion, a large diameter portion, and a tapered portion between the small diameter portion and the large diameter portion. The core shaft and the coil body are fixed at a portion excluding the tapered portion. A first bending rigidity FR1 of the large diameter portion, a second bending rigidity FR2 of the small diameter portion, and a length L of the tapered portion satisfy the following expressions (1) and (2). In the following expressions (1) and (2), the unit of L is mm (millimeter).

Abstract: A guide wire of the present disclosure includes a core shaft having a distal end portion reducing in diameter, a coil body wound to cover the distal end portion, and a distal end fixing portion fixing the core shaft and the coil body to each other. The distal end portion includes a small diameter portion, a large diameter portion, and a tapered portion between the small diameter portion and the large diameter portion. The core shaft and the coil body are fixed at a portion excluding the tapered portion. A first bending rigidity FR1 of the large diameter portion, a second bending rigidity FR2 of the small diameter portion, and a length L of the tapered portion satisfy the following expressions (1) and (2). In the following expressions (1) and (2), the unit of L is mm (millimeter).

Abstract: A guide wire includes a core shaft having a first expanded diameter portion which increases in diameter toward the proximal end side and a first extended portion, a first coil body wound so as to cover at least a portion of the core shaft, a distal end fixing portion at which the distal end of the core shaft and the distal end of the first coil body are fixed to each other and a proximal end of the first coil body is not fixed to the first expanded diameter portion, but is fixed to the first extended portion.

Abstract: A guidewire includes, for example, a core shaft, a coil body having a distal end that is joined to the core shaft at a position spaced proximally from a distal end of the core shaft, and a coating agent covering an outer periphery of the core shaft and the coil body. The core shaft includes a bulge portion joined at a position spaced distally from the distal end of the coil body, and the coating agent covers the core shaft and the coil body from a distal side of the bulge portion to a proximal side of a proximal end of the coil body except for an interior of the coil body.

Abstract: A guide wire of the present disclosure includes a core shaft having a distal end portion decreasing in diameter, a coil body wound to cover the distal end portion, and a distal end fixing portion fixing the core shaft and the coil body to each other. The distal end portion includes a small diameter portion, a large diameter portion, and a tapered portion between the small diameter portion and the large diameter portion. The core shaft and the coil body are fixed at a portion excluding the tapered portion. A first bending rigidity FR1 of the large diameter portion, a second bending rigidity FR2 of the small diameter portion, and a length L of the tapered portion satisfy the following expressions (1) and (2). In the following expressions (1) and (2), the unit of L is mm (millimeter).

Abstract: A guide wire includes a core shaft having a distal end portion stepwisely decreasing in diameter, an inner coil body covering at least a part of an outer periphery of the distal end portion, an outer coil body covering an outer periphery of the inner coil body, and a distal end fixing portion that fixes distal ends of the core shaft. The distal end portion includes a small diameter portion, a large diameter portion inside the inner coil body and the outer coil body further in the proximal end direction than the small diameter portion and having a larger diameter than that of the small diameter portion, and a tapered portion that increases in diameter from the small diameter portion toward the large diameter portion. A radiopaque marker is on an outer peripheral surface of the tapered portion. A gap is between the radiopaque marker and the inner coil body.

Abstract: A guide wire of the present disclosure includes a core shaft having a distal end portion reducing in diameter, a coil body wound to cover the distal end portion, and a distal end fixing portion fixing the core shaft and the coil body to each other. The distal end portion includes a small diameter portion, a large diameter portion, and a tapered portion between the small diameter portion and the large diameter portion. The core shaft and the coil body are fixed at a portion excluding the tapered portion. A first bending rigidity FR1 of the large diameter portion, a second bending rigidity FR2 of the small diameter portion, and a length L of the tapered portion satisfy the following expressions (1) and (2). In the following expressions (1) and (2), the unit of L is mm (millimeter).

Abstract: A guide wire having sufficient flexibility and sufficient rigidity to prevent a bending point from progressing from a distal end of the guide wire to a proximal end of the guide wire even when the guide wire collides with a hard lesion. The guide wire includes a shaft and a first coil body wound around a distal portion of the shaft. The first coil body is formed by helically winding a stranded wire, which is formed by winding a plurality of element strands together. A joint portion is disposed at an intermediate part of the first coil body so as to join at least two adjacent stranded wires to each other without contacting the shaft.