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Guidewire

A wire and coil technology applied to wires. field, it can solve the problems of blood vessel damage, the front end of the wire is too hard, and the brazing part at the front end cannot be prevented from falling off, so as to achieve the effect of preventing damage to blood vessels, preventing falling off, and ensuring flexibility

Inactive Publication Date: 2012-02-08
ASAHI INTECC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, although the lead wire described in Patent Document 1 is provided with a fixed portion on the front end of the core wire, it can prevent the fixing portion (brazed portion at the front end) from falling off, but if the core wire used has a level that can prevent the fixing portion from falling off If the part to be fixed is fixed, the front end of the wire will become too hard, causing damage to blood vessels and the like.
[0006] In addition, although the lead wire described in Patent Document 2 has a double-coil member structure, since the outer diameters of the coils are equal, it is not possible to prevent the tip soldering portion from coming off.

Method used

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Experimental program
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Effect test

no. 1 approach

[0041] figure 1 It is an overall view showing the lead wire according to the first embodiment of the present invention.

[0042] For the sake of illustration, in figure 1 In the description, the left side is referred to as the "basal end" and the right side is referred to as the "front end".

[0043] Also, for ease of understanding, in figure 1 In , the length direction of the lead wire 1 is shortened, and the overall size of the lead wire 1 is different from the actual one in order to schematically illustrate the whole.

[0044] exist figure 1 Among them, a lead wire 1 includes a mandrel 2 and a coil member 3 covering the front end of the mandrel 2 . The front end portion of the mandrel 2 and the front end portion of the coil member 3 are fixedly connected to each other to form a front end portion 4, and in a direction closer to the base end than the front end portion 4, the base end portion of the coil member 3 is fixedly connected by a brazing portion 9. on mandrel 2. ...

no. 2 approach

[0058] Next, use figure 2 , the lead wire 11 of the second embodiment will be described centering on differences from the first embodiment. In the drawings, the same reference numerals are used for the same parts as those of the first embodiment.

[0059] Also, for ease of understanding, figure 2 also with figure 1 Similarly, the length direction of the lead wire 11 is shortened, and the overall size of the lead wire 11 is different from the actual one for schematically illustrating the whole.

[0060] The lead wire 11 includes: a mandrel 2 ; an outer coil member 13A covering the mandrel 2 ; and an inner coil member 13B located inside the outer coil member 13A and covering the mandrel 2 . The front end portion of the mandrel 2, the front end portion of the outer coil member 13A, and the front end portion of the inner coil member 13B are fixedly connected to each other to form the front end portion 4. In the direction closer to the proximal end than the front end portion 4...

no. 3 approach

[0068] Next, use image 3 , the lead wire 21 of the third embodiment will be described centering on differences from the second embodiment. In the figure, the same part as the second embodiment adopts the same

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PUM

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Abstract

A guidewire (1) includes a core shaft (2) and a coil body (3) wound around an outer periphery of the core shaft. A distal end portion of the core shaft and a distal end portion of the coil body are fixed to each other with a most distal end portion (4). The coil outer diameter of the coil body in the most distal end portion is nonuniform.

Description

technical field [0001] The invention relates to a wire. Background technique [0002] Conventionally, various guide wires have been proposed for insertion into tubular organs such as blood vessels, digestive tract, and urethra, or tissues in the body to guide medical equipment and the like to target sites. [0003] For example, Patent Document 1 (Japanese Patent Laid-Open Publication No. 2003-52829) describes a lead wire in which a fixed portion is formed at the tip of a core wire or the like to prevent the fixing portion from coming off. [0004] Furthermore, Patent Document 2 (US Patent No. 5345945 specification) describes a lead wire having a double coil structure provided with an outer coil member and an inner coil member. [0005] However, although the lead wire described in Patent Document 1 is provided with a fixed portion on the front end of the core wire, it can prevent the fixing portion (brazed portion at the front end) from falling off, but if the core wire used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/09
CPCA61M25/09A61M2025/09083A61M2025/09175
Inventor 金沢祐弥
Owner ASAHI INTECC CO LTD