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Stent braid pattern with enhanced opaque linearity

A technology of braided fabrics and braided machines, which is applied in the direction of brackets, braided fabrics, textiles, and papermaking, and can solve the problems of small size, difficult X-ray positioning of brackets, etc.

Pending Publication Date: 2022-03-18
STRYKER CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, a significant problem remains during the placement of the stents and during the subsequent examination of the patient: due to their small size, these stents are extremely difficult to locate with x-rays

Method used

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  • Stent braid pattern with enhanced opaque linearity
  • Stent braid pattern with enhanced opaque linearity
  • Stent braid pattern with enhanced opaque linearity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The present invention generally relates to implantable, radially expandable stents having a unique weave pattern that enhances the radiopacity of the stent without negatively impacting the mechanical properties of the stent. The stent may be a shunt stent used to treat aneurysms, or may be used for other endoluminal applications such as treating stenosis, maintaining ostia, and the like. The unique weave pattern provides enhanced radiopacity while maintaining or improving the mechanical properties of the tubular stent compared to existing stents formed from the same or similar materials. Thus, the unique radiopaque pattern of the disclosed device provides additional information to the physician as the physician can more easily determine length, compaction, diameter reduction, etc.

[0017] Braided scaffolds of the same material, size, number of filaments, and filament size will produce different patterns under X-ray depending on how the wire pattern is placed on the bra...

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PUM

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Abstract

The implantable metal braid is formed by a group of filaments of a first material, a group of filaments of a second material different from the first material, and a group of filaments of a third material different from the first material and the second material. The filaments are knitted together by a knitting machine and arranged on the knitting machine in a starting filament arrangement before knitting begins, where the first material is a radiopaque material, the second material is a support material, and the third material is a DFT comprising the first material and the second material. Initiating different filament arrangements in the filament arrangement and in the braid enables different levels of details to be observed in an image of the braid, where the specific arrangement of filaments achieves enhanced opaque linearity without affecting other mechanical properties of the braid.

Description

technical field [0001] The present invention relates generally to implantable medical devices and, more particularly, to stents with enhanced radiopacity and favorable mechanical properties. Background technique [0002] Self-expanding medical prostheses, commonly referred to as stents, are well known and commercially available. These types of devices are used within blood vessels of the body for various medical applications. Examples include intravascular stents to treat strictures, stents to maintain openings in the urinary, biliary, esophageal, and renal tracts, and vena cava filters to trap emboli. Furthermore, stents in vessels where aneurysms are developing are now well known and widely used. Stents with particularly fine meshes are often made as braided stents, eg for use as shunts. [0003] Self-expanding stents are formed by a number of elastic filaments (threads) that are helically wound and interwoven in a braided configuration. These stents assume a substanti...

Claims

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Application Information

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IPC IPC(8): A61F2/90A61L31/02A61L31/18D04C1/06
CPCA61F2/90A61L31/022D04C1/06A61L31/18D10B2509/06A61F2250/0098
Inventor 杰弗里·卢
Owner STRYKER CORP