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Guidewire

A wire and coil technology applied to wires. In this field, it can solve problems such as residue, damage to the inside of blood vessels, coil shedding, etc., and achieve the effects of improving the strength of fixed connections, improving safety, and inhibiting thermal influence

Active Publication Date: 2015-04-15
ASAHI INTECC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the lead wire described in Patent Document 1, since the fixed connection portion on the head side of the head and the coil is formed only on a part of the head, the fixed connection strength is insufficient, and the front end of the coil may fall off from the core wire. And the detached coil will damage the inside of the blood vessel, etc. or remain in the blood vessel
[0006] In addition, the lead wire described in Patent Document 2 uses Au-Sn based solder to fix and connect the core wire and the front end of the coil spring. Although the strength of the fixed connection is slightly increased, since the front end part of the core wire and the coil spring are fixedly connected, the Even if the inside is filled with resin, it cannot be considered that the fixed connection strength is strong enough. Like the lead wire described in Patent Document 1, the tip of the coil spring will fall off from the core wire, and the coil spring will damage the inside of blood vessels such as blood vessels or remaining in the vessel

Method used

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Examples

Experimental program
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Effect test

no. 1 approach

[0049] figure 1 It is an overall view showing the lead wire according to the first embodiment of the present invention.

[0050] For the convenience of explanation, 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".

[0051] 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.

[0052] exist figure 1 Among them, the wire 1 includes: a mandrel 2 and a coil member 3 covering the front end of the mandrel 2 .

[0053] The mandrel 2 includes: a large-diameter portion 2a; a tapered portion 2b located at the front end of the large-diameter portion 2a, the outer diameter of which decreases toward the front end; and a small-diameter portion 2c located at the front end of the tapered portion 2b.

[0054]A swollen portion 5 is provi...

no. 2 approach

[0097] 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.

[0098] Also, for ease of understanding, figure 2 In order to shorten the longitudinal direction of the lead wire 11 and to schematically illustrate the whole lead wire 11, the overall size of the lead wire 11 is different from the actual one.

[0099] exist figure 2 Among them, the basic structure of the lead wire 11 is the same as that of the lead wire 1 , the difference is that the outer diameter of the swollen portion 15 is larger than the coil inner diameter of the coil member 3 .

[0100] Since the outer diameter of the swollen portion 15 of the wire 11 is larger than the coil inner diameter of the coil member 3, the coil member 3 can be further prevented from falling off from the mandrel 2, thereby further improving the ...

no. 3 approach

[0104] Next, use image 3 , the lead wire 21 of the third 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.

[0105] Also, for ease of understanding, image 3 In order to shorten the longitudinal direction of the lead wire 21 and to schematically illustrate the whole lead wire 21, the overall size of the lead wire 21 is different from the actual one.

[0106] exist image 3 Among them, the wire 21 includes: a mandrel 2; a coil member 3 covering the front end of the mandrel 2; and an inner coil member 13 located on the inner side of the coil member 3, and fixedly connected to the front end of the inner coil member 13 and the mandrel through a bulge 5 The front end of the narrow portion 2c of 2 and the proximal end of the inner coil member 13 are fixedly connected to the middle portion of the narrow portion 2c of the mandrel 2 and the middl...

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PUM

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Abstract

An object of the present invention is to provide a highly safe guidewire 1 by increasing the bonding strength between a core shaft 2 and a coiled body 3 of the guidewire 1. The guidewire 1 includes the core shaft 2, and the coiled body 3 wound around the outer circumferential surface of the core shaft 2. A bulged portion 5 is provided at the tip portion of the core shaft 2. The front end of the coiled body 3 is bonded to the front end of the core shaft 2 with a bonding portion 6. The bonding portion 6 is provided to enclose the bulged portion 5 provided at the tip portion of the core shaft 2.

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. Hei 6-81547) describes a wire having a head at the front end of the core wire, and the head is fixedly connected to the front end of the coil by metal solder. [0004] In addition, Patent Document 2 (Japanese Patent Laid-Open Publication No. 2010-214054) describes a wire that uses Au-Sn-based solder to fix and connect the core wire and the front end of the coil spring, and inside the wire Filled with resin. [0005] However, in the lead wire described in Patent Document 1, since the fixed connection portion on the head side of the head and the coil is formed only on a part of the head, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M25/09A61M25/00
CPCA61M2025/09175A61M2025/09083A61M25/09A61M2025/09108
Inventor 宫田尚彦西岸诚槙英昭小池忠裕金沢祐弥
Owner ASAHI INTECC CO LTD