Abstract: An elongated medical instrument includes: a base material part; and an outer layer part made of a resin based on a resin suspension that is coated on an outer peripheral surface of the base material part; where a surface of the outer layer part has irregularly disposed recesses formed from cracks generated by drying of the resin suspension, and protrusions formed with an outer peripheral surface formed on an outer peripheral side of the recesses.

Abstract: An elongated medical instrument includes a base material part, and an outer layer part made of a resin provided on a surface of the base material part. An outer surface of the outer layer part is a substantially flat surface other than the presence of irregularly disposed recesses or protrusions.

Abstract: Dilator includes a hollow shaft having a tapered portion, in which an outer diameter of a distal end is smaller than a outer diameter of a proximal end, and a main body portion which has a distal end located at the proximal end of the tapered portion, extends toward a proximal end side, and has a constant outer diameter. A spirally-arranged protruding portion which is configured of a coil body formed by winding a wire is provided on an outer peripheral surface of the tapered portion and the main body portion. The spirally-arranged protruding portion has gaps between portions adjacent to each other along a longitudinal direction of the hollow shaft. The spirally-arranged protruding portion is not joined to the tapered portion, but is joined to the main body portion at a joint part.

Abstract: A guide wire includes a core wire, a first resin layer that coats a part of the core wire, a coil body wound around another part of the core wire and an outer side of the first resin layer, and a second resin layer that coats the coil body, in which a part of the coil body is embedded in the first resin layer and the second resin layer.

Abstract: A guide wire includes a main body portion having an elongated outer shape and having a base and a marker alternately presented on an outer surface along an extending direction, and a resin layer having light permeability, covering the outer surface of the main body portion, and including a recessed portion and a protruding portion alternately arranged along the extending direction of the main body portion, wherein in longitudinal cross-section along the extending direction of the main body portion, a width of the marker is wider than a width of the protruding portion.

Abstract: To provide a guide wire including a core shaft having an elongated outer shape, and a coating film on an outer surface of the core shaft, the coating film containing a resin. The coating film includes a marker portion containing a pigment on an outer surface of the coating film and a resin portion not containing the pigment. On the outer surface of the coating film, the marker portion and the resin portion are alternately visible in a stretching direction. Of the coating film, a thickness of a portion where the marker portion is visible on the outer surface and a thickness of a portion where the resin portion is visible on the outer surface are substantially the same, or the thickness of the portion where the marker portion is visible is smaller than the thickness of the portion where the resin portion is visible.

Abstract: A guide wire includes a core shaft, a coil body that is a wire wound around the core shaft, and a resin layer covering at least an outer peripheral surface of the coil body. The coil body includes a spaced part in which a gap is formed between adjacent wires, and is arranged to form a void between the coil body and the core shaft. The resin layer includes a protruding portion protruding inside the void toward the core shaft through the gap between the adjacent wires in the spaced part. The protruding portion extends toward the core shaft in a direction away from an inner peripheral surface of the coil body.

Abstract: In a guidewire, a second curved portion has a higher flexibility than a first curved portion and a third curved portion. Thus, a portion around the second curved portion can bend to a large degree. Consequently, a distal tip of the guidewire, in a state of being stuck on a side branch, can be released from the side branch and a distal region can be prevented from being rotated around the second curved portion.

Abstract: A guidewire includes a core shaft, an outer coil body that covers an outer periphery of the core shaft, and an inner coil body that covers a distal portion of the core shaft in the outer coil body. A distal end and a proximal end of the inner coil body are free ends having no bonding portions. A bonding portion bonds the inner coil body to only one of the core shaft and the outer coil body.