Guidewire

A wire and coil technology applied to wires. In the field, it can solve the problems of mechanical strength reduction, outer diameter increase, wire deformation, etc., and achieve the effect of improving insertability, improving passability, and reducing thermal influence

Inactive Publication Date: 2012-12-12
ASAHI INTECC CO LTD
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, since the lead wire described in Patent Document 1 is welded to form a tip joint, it is necessary to melt the core material or coil material around the tip joint once, and the core material or coil will be in an annealed state due to the thermal influence during welding, so that The mechanical strength is greatly reduced
In addition, in the case where the core material and the coil are formed of different kinds of metals, since the melting point of the core material is different from that of the coil, sufficient welding strength cannot be obtained, resulting in a further decrease in the mechanical strength of the tip joint.
Therefore, when the guidewire described in Patent Document 1 is inserted into the vascular occlusion lesion, the leading end of the guidewire is deformed, and it does not have sufficient insertability into the vascular occlusion lesion.
[0006] In addition, there are problems in that it is difficult to form the front end joint into a spherical shape, and a lot of work time is required for subsequent tapering
[0007] In addition, although the guidewire described in Patent Document 2 improves the insertion property into the vascular occlusion lesion by the protrusion provided at the distal end of the distal end joint, the outer diameter is different from the base end of the protrusion to the front end of the distal joint. As a result, the guide wire described in Patent Document 2 does not have sufficient passability to the vascular occlusion lesion.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Guidewire
  • Guidewire
  • Guidewire

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0043] figure 1 (a) is an overall view showing the lead wire 1 according to the first embodiment of the present invention.

[0044] In addition, for the convenience of explanation, in figure 1 In the description, the left side is referred to as the "proximal end side" and the right side is referred to as the "tip end side".

[0045] 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.

[0046] exist figure 1 In (a), the wire 1 includes: a mandrel 2; a coil member 3 covering the front end of the mandrel 2; In the direction of the proximal end of the most distal portion 5 , the coil component 3 and the mandrel 2 are fixedly connected by an intermediate fixed connection portion 7 , and the proximal end of the coil component 3 and the mandrel 2 are fixedly connected by a proximal fixed connection portion 9 ....

no. 2 approach

[0078] 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.

[0079] Also, for ease of understanding, in 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.

[0080] exist figure 2 Among them, the lead wire 11 is different from the first embodiment in that it has the same outer diameter portion 13 with the same coil outer diameter on the base end side of the coil member 3, and has a coil outer diameter portion 13 with a reduced coil outer diameter toward the front end direction on the front end side of the coil member 3. small tapered portion 23 , and has a second intermediate fixed connection portion 17 fixedly connecting the mandrel 2 an...

no. 3 approach

[0088] Next, use image 3 In (a) and (b), the lead wire 21 of the third embodiment will be described focusing 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.

[0089] Also, for ease of understanding, in image 3 In (a), the longitudinal direction of the lead wire 21 is shortened, and the overall size of the lead wire 21 is different from the actual one in order to schematically show the whole lead wire 21 . also, image 3 (b) is the image 3 (a) is an enlarged view of the front end portion 5 .

[0090] exist image 3 In (a) and (b), the lead wire 21 is different from the first embodiment in that a lubricious coating layer 8 is applied to the outer periphery of the leading end portion 5 . Also, in the third embodiment, according to image 3 In (b), the lubricious coating layer 8 is coated on the outer peripheries of the proximal-side most distal portion 5 a , the outer di...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A guidewire (1) includes a core shaft (2), a coil body (3), and a tip portion (5). The coil body (3) covers a distal end portion of the core shaft (2). The tip portion (5) is formed by joining a distal end of the coil body (3) and a distal end of the core shaft (2) using metal solder. The tip portion (5) includes an outside diameter decreasing portion (5b) and a rounded, e.g. spherical cap-shaped or hemisphere-shaped, portion (6). The outside diameter of the outside diameter decreasing portion (5) decreases linearly in a direction of a distal end. The rounded portion (6) is positioned at a distal end of the outside diameter decreasing portion (5).

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. In addition, in recent years, internal medical treatment using guide wires has been performed in many cases for vascular occlusion lesions that cause ischemic diseases. Among them, it is known that there are small pathways (hereinafter referred to as microchannels) in the vascular occlusion lesion, and it is required to improve the insertability and passability of the guidewire to the microchannel in the vascular occlusion lesion for the guide wire currently being developed. [0003] For example, Patent Document 1 (US Patent Publication No. 2007 / 0185415 specification) describes a lead wire having a front end joint formed by welding at the front end, the outer diameter of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/09
CPCA61M25/09A61B2017/22044A61B2017/22094A61M2025/09083A61M2025/09108A61M2025/09175
Inventor 槇英昭
Owner ASAHI INTECC CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap