Guidewire

Abstract

A guide wire (1A) includes a core shaft (2) and a coil body (3) that covers at least a distal end portion of the core shaft (2). Along a center line (L1) in a long-axis direction of the core shaft (2), the distal end portion of the core shaft (2) has, in a state prior to mounting thereof and the core shaft (2) to each other, a first curvature (X1) with respect to a proximal end of the core shaft (2). Along a center line in a long-axis direction of the coil body (3), at least a distal end portion of the coil body (3) has, in a state prior to mounting thereof and the coil body (3) to each other, a second curvature (X2) with respect to a proximal end of the coil body (3). When the core shaft (2) and the coil body (3) are mounted to each other, a distal end portion (k) of the guide wire (1A) has, along a center line in a long-axis direction of the guide wire (1A), a third curvature (X3) with respect to a proximal end of the guide wire (1A).

Description

technical field [0001] The invention relates to a guide wire suitable for the medical field. Background technique [0002] In the medical field, when inserting a catheter into a blood vessel, the urethra, or an organ, etc., and when inserting an indwelling device into an aneurysm part of a blood vessel, a guide wire is well known to be used as a guide. Generally, the lead wire includes a mandrel (core wire) and a coil member (coil), the coil member is wound on the outer circumference of the front end portion of the mandrel, and by connecting the front end portion of the coil member and the the front end, thereby forming the most front end. [0003] In addition, it is known that the leading end of the guide wire is sometimes formed into a curved shape in order to improve the selectivity for branch vessels in blood vessels and the like. For example, in Patent Document 1 (Japanese Patent Laid-Open Publication No. Hei 7-255856), a method is disclosed in which a core wire const...

AI Technical Summary

Problems solved by technology

[0004] However, since the lead wire end portion described in Patent Document 1 is configured such that both the core wire end portion and the coil end portion are formed in a curved shape with substantially the same curvature, although the shape retention of the lead wire end portion is good, when the lead wire end is used, the In the case where the elastically deformed part becomes a linear shape, the "jump" of the front end is excessive due to the elastic restoring force accompanying the elastic deformation.

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