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Endoluminal prostheses including multiple helical wires

A wire and prosthesis technology, applied in the field of endoluminal prosthesis, can solve problems such as stent graft failure

Active Publication Date: 2020-04-21
MEDTRONIC VASCULAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Failure or failure of any portion of a single helix along the length of the stent-graft prosthesis can result in failure of the entire stent-graft as there is no fail-safe or backup on a stent-graft prosthesis formed from a single helix supporting structure

Method used

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  • Endoluminal prostheses including multiple helical wires
  • Endoluminal prostheses including multiple helical wires
  • Endoluminal prostheses including multiple helical wires

Examples

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Embodiment Construction

[0017] Specific embodiments of the present invention are now described with reference to the drawings, wherein like reference numerals indicate identical or functionally similar elements. Unless otherwise stated, the term "self-expanding" is used in the following description to refer to the scaffolding structure or structures of the prostheses herein and to indicate that these structures provide mechanical memory to move the structure from a compressed or constrained delivery configuration. Returning to the material shaping or forming of the expanded deployed configuration. Non-exhaustive exemplary self-expanding materials include stainless steel, pseudo-elastic metals such as nitinol or nitinol, various polymers, or so-called superalloys of base metals that may have nickel, cobalt, chromium, or other metals. Mechanical memory can be imparted to the wire or stent structure by heat treatment to achieve elastic tempering eg in stainless steel, or setting shape memory in suscepti...

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Abstract

A prosthesis includes a first wire bent into a first waveform and spirally wrapped into a first helix having a plurality of windings that form a hollow cylindrical shape and a second wire bent into asecond waveform and spirally wrapped into a second helix having a plurality of windings that form a hollow cylindrical shape. The first and second wires are disposed relative to each other such that the plurality of windings of the first wire and the plurality of windings of the second wire are disposed about a common longitudinal axis and the plurality of windings of the first wire and the plurality of windings of the second wire are axially offset from each other, with windings of the plurality of windings of the first wire alternating or interwoven between windings of the plurality of windings of the second wire along a length of the prosthesis.

Description

technical field [0001] The present invention relates generally to endoluminal prostheses. More specifically, the present invention relates to endoluminal prostheses comprising at least two helical wires. Background technique [0002] A stent is a type of endoluminal prosthesis. A stent is a generally tubular, open-ended structure that provides support to a damaged, collapsed, or blocked blood vessel. They are radially expandable from a radially compressed configuration for delivery to an affected vascular site to a radially expanded configuration when deployed at an affected vascular treatment site, wherein the diameter of the radially expanded configuration is greater than that of the radially compressed configuration diameter. The stent is flexible, which allows the stent to be inserted through and conform to the tortuous path in the blood vessel. Stents are typically inserted in a radially compressed configuration and expanded to a radially expanded configuration by a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/07A61F2/91
CPCA61F2/89A61F2/91A61F2002/828A61F2220/0058A61F2230/0054A61F2230/0091A61F2250/006A61F2/88A61F2/07A61F2/915A61F2002/91525
Inventor T·罗G·贝尔特
Owner MEDTRONIC VASCULAR INC
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