Extendable soft stent with excellent follow-up capability to blood vessel

An ability and blood vessel technology, which is applied in the field of stretchable and flexible stents with excellent follow ability to blood vessels, can solve problems such as shortening, and achieve the effects of reduced curvature deformation, good follow ability, and small damage

Inactive Publication Date: 2006-08-09
NIPRO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the stent has the problem that the length of the stent becomes shorter due to expansion, the so-called shortening

Method used

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  • Extendable soft stent with excellent follow-up capability to blood vessel
  • Extendable soft stent with excellent follow-up capability to blood vessel
  • Extendable soft stent with excellent follow-up capability to blood vessel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] figure 1 is an enlarged plan view of a stent according to an embodiment of the present invention, figure 2 for figure 1 Deployment of the stent shown, image 3 for showing figure 1 An enlarged plan view of the expanded state of the shown stent, and Figure 4 enlarged for part figure 2 view.

[0045] Such as Figures 1 to 3 As shown, the stent of Example 1 is a tubular member, including eleven ring-shaped members 1 arranged in the longitudinal direction of the stent, used to keep the body cavity open, and three ring-shaped members 1, 1 adjacent in the longitudinal direction. Connecting elements 2 arranged so that they are connected to each other. Each annular member 1 comprises three pieces of first annular member elements 11 and three pieces of second annular member elements 12 which are interconnected alternately in the circumferential direction to define an annular member which is expandable in radial direction.

[0046] Such as figure 2 and 4 As shown, t...

Embodiment 2

[0052] The following will refer to Figure 6 Example 2 of the present invention will be described.

[0053] The stent of Example 2 is a modification of the stent of Example 1, wherein the distance ratio from the radial bisector to the top of the corresponding arched section is set at 7:8, and the arched section 125, 114, 3 and arcuate sections 124, 4, 115 are aligned with each other proximally of the stent at the proximal end of the annular member 5 or distally of the stent at the distal end of the annular member 6, and The connecting element 2 is formed as Figure 5 The shape shown in E. Such as Figure 6 As shown, the stent includes six annular members 1a-1f, which are radially expandable, and two adjacent annular members 1 pass through three such as Figure 5 The corrugated connecting elements 2 shown in E are connected to each other.

[0054] The arcuate segments of the annular member positioned at each end of the stent are aligned along the proximal or distal end of ...

Embodiment 3

[0058] The following will refer to Figure 7 Embodiment 3 of the present invention will be described.

[0059] The stent of Example 3 is a modification of the stent of Example 1, wherein the connection element 2 is formed as Figure 5 The shape shown in D. Such as Figure 7 As shown, the stent includes 10 annular members 1, which are radially expandable and arranged in the direction of the longitudinal axis of the stent, and adjacent annular members 1, 1 pass through three such as Figure 5 The corrugated connecting elements 2 shown in D are connected to each other. The lumen following ability of the above-mentioned scaffold is excellent, because the whole scaffold is flexible enough to respond to bending. Furthermore, it is easy to provide lateral holes for the bracket. In addition, curvature deformation at the top of the arched elements is prevented when the stent is expanded, and the curvature deformation that may occur when the stent is bent is minimized, thereby avoi...

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PUM

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Abstract

A stent formed in a tubular member, comprising a plurality of annular members (1) longitudinally arranged to hold an organic lumen in a patent state and one or a plurality of connection elements (2) connecting longitudinally adjacent annular members (1) and (1) to each other. Each of the annular members (1) further comprises a plurality of first annular member elements (11) and second annular member elements (12) continued to each other in the circumferential direction, and is extendable in the radial direction. Since the stent is soft, excellent in the follow-up capability to the lumen, and accordingly allowed to pass through the three-dimensionally meandering lumen, a shortening is not substantially produced and, in addition, a lateral hole can be formed.

Description

technical field [0001] The present invention relates to stents implanted in the human body to maintain the diameter of body lumens such as blood vessels. Background technique [0002] Heretofore, stents have been used to expand the diameter of a body lumen, such as a blood vessel, and maintain it at the expanded lumen diameter. Stents can be expanded by a variety of methods, such as balloon expansion, self-expanding using shape memory materials, mechanical expansion, or the like. The most widely used method is balloon dilatation. In balloon dilatation, a stent is introduced with a balloon catheter at a desired location in the body, expanded by inflation of the balloon to dilate the diameter of the lumen, and remains in the expanded position even after the deflated balloon is removed from the location. A stent generally includes a lumen diameter maintaining portion for expanding and maintaining the diameter of a lumen such as a blood vessel, and a joint portion for connecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M29/02
Inventor 佐野嘉彦田中裕治
Owner NIPRO CORP
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