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Guide wire

A technology of guide wire and protrusion, applied in the direction of catheter, guide wire, etc., can solve the problem of rolling up

Active Publication Date: 2012-12-05
TERUMO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in such a conventional guide wire, for example, when the distal end thereof is bent with a relatively small bending radius, the proximal end of the resin coating layer and the distal end of the ring-shaped member are separated from each other, and a problem occurs at these boundary portions. Cracks, that is, the base end of the resin coating is peeled off from the guide wire body, and there is a danger of curling up
Moreover, when the guide wire in this state is pushed into the catheter from the proximal end side, there is a possibility that the distal end of the catheter may catch on the above-mentioned rolled-up portion.

Method used

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Experimental program
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Effect test

no. 1 Embodiment approach

[0033] figure 1 It is a longitudinal sectional view showing the first embodiment of the guide wire of the present invention, figure 2 yes means figure 1 Longitudinal sectional view of the guide wire shown in use. In addition, in the following, for the convenience of explanation, the figure 1 and figure 2 in (later mentioned Figure 3 ~ Figure 7 Similarly) the right side is called "basal end", and the left side is called "front end". In addition, in each figure, for easy understanding, the longitudinal direction of the guide wire is shortened, and the width direction of the guide wire is exaggerated and schematically shown, and the ratio of the longitudinal direction and the width direction is different from the actual one.

[0034] Figure 1 ~ Figure 3 The shown guide wire 1 is a catheter guide wire used for insertion into the lumen 201 of a catheter 20 (including an endoscope), and the guide wire includes: a long guide wire body 2; a helical coil 4; and a front end T...

no. 2 Embodiment approach

[0075] image 3 It is a partial vertical cross-sectional side view showing a second embodiment of the guide wire of the present invention.

[0076] Hereinafter, a second embodiment of the guide wire of the present invention will be described with reference to this figure, but the description will focus on the differences from the above-mentioned embodiment, and the description of the same items will be omitted.

[0077] This embodiment is the same as the above-mentioned first embodiment except that the structure of the protruding member is different.

[0078] exist image 3 In the shown guide wire 1 , a plurality of grooves (recesses) 54 are formed on the outer peripheral portion of the protruding member 5B. Moreover, each groove 54 is inclined relative to the longitudinal direction of the guide wire. In addition, each groove 54 is preferably a slit penetrating through the wall portion of the protruding member 5B.

[0079] By forming such grooves 54 , the protruding member...

no. 3 Embodiment approach

[0083] Figure 4 It is a partial vertical cross-sectional side view showing a third embodiment of the guide wire of the present invention.

[0084] Hereinafter, a third embodiment of the guide wire of the present invention will be described with reference to this figure, but the description will focus on the differences from the above-mentioned embodiment, and the description of the same items will be omitted.

[0085] This embodiment is the same as the above-mentioned first embodiment except that the structure of the protruding member is different.

[0086] exist Figure 4 In the shown guide wire 1 , the protruding member 5C is constituted by a coil in which a wire 55 is wound helically around the axis of the core wire 3 . As a result, the protruding member 5C itself becomes a flexible member, so that the followability of the guide wire 1 , especially the protruding member 5C to a curved living body lumen is improved.

[0087] In addition, the protruding part 5C is in Fi...

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Abstract

Disclosed is a guide wire which comprises: a flexible long wire main body; and a coating layer that covers the front end portion of the wire main body and is configured of a resin material. The wire main body of the guide wire is provided with a projection that protrudes along the entire outer circumference of the main body. The front end portion of the projection is in contact with the base end portion of the coating layer, and the maximum outer diameter of the projection is larger than the outer diameter of the coating layer that is in contact with the projection. The base end portion of the projection has an outer diameter tapering portion wherein the outer diameter is gradually reduced toward the base end.

Description

technical field [0001] The present invention relates to guide wires. Background technique [0002] When a catheter is inserted into a living body lumen such as a digestive tract or a blood vessel, a guide wire is used to guide the catheter to a target site in the living body lumen. This guide wire is inserted into a catheter and used. In addition, observation and treatment of a living body lumen using an endoscope are also performed using a guide wire, and the endoscope and a catheter inserted into the lumen of the endoscope are also guided to a living body lumen and the like using a guide wire. target site. [0003] As the guide wire, there is known a guide wire including: a long guide wire body; a resin coating layer covering the front end of the guide wire body; A ring-shaped member in the step space between the filament main body and the resin coating layer (for example, refer to Patent Document 1). The guide wire described in this patent document 1 has a structure i...

Claims

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Application Information

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IPC IPC(8): A61M25/01
CPCA61M2025/09108A61M2025/09091A61M2025/09133A61M25/09
Inventor 锅岛阳助玉井则之田野丰渡边龙一
Owner TERUMO KK
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