Micro structure stent configurations

a micro-structure, stent technology, applied in the field of medical stents, can solve the problem that the stent type is not widely acceptable, and achieve the effect of improving the stent quality and stent quality

Inactive Publication Date: 2010-07-13
BOSTON SCI SCIMED INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0015]The preferred stents having a micro structure in accordance with the present invention will also have a wall thickness of up to 0.004 inches which is not required according to the invention but provides adequate radiopacity and handling characteristics in the stent structure.

Problems solved by technology

However, this type of stent has not been widely acceptable and differs from the stents of the present invention in that no strut deformation occurs with respect to the elements making up the foil or screen of the ultra thin micro porous jelly roll type stent.

Method used

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Examples

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Effect test

Embodiment Construction

[0026]This invention in contrast to the prior art jelly roll structure suggests that micro porous stents should be provided which have a deformable structure. Generally, this is meant that the deformable struts of both self-expanding and mechanically-expandable stents already known in the art should be provided with micro porous structure. The fabrication of such stents is typically from flat sheet which is rolled then welded into a cylinder or from tubular stock.

[0027]A first way involves simply making the struts and the openings of the stent extremely small. Such a stent would be comprised of a plurality of interconnected deformable struts arranged with respect to each other to provide a micro structure which facilitates support with a minimal disruption in the vessel of a body, the micro structure being characterized, after expansion, by about the following dimensions or smaller.

[0028]

strut width0.00025-0.002inchesstrut thickness0.00025-0.004inchesmaximum PIN opening0.002-0.20inc...

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PUM

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Abstract

Fine structure stents physiologically acceptable to the body.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. patent application Ser. No. 10 / 101,262, filed Mar. 18, 2002, issued as U.S. Pat. No. 6,852,123, which is a continuation of U.S. patent application Ser. No. 09 / 437,049 filed Nov. 9, 1999, and issued as U.S. Pat. No. 6,428,569 the entire content of each being incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]This invention relates to medical stents. Medical stents are well know for use in opening and reinforcing the interior wall of blood vessels and other body conduits.[0003]Stents are generally tubular in configuration and radially expandable. They may be of the self-expanding type or they may be mechanically expandable with an outward pressure applied to the stent. Typically, the later type stents are expanded by means of an interiorly positioned balloon. Stents may be made of various materials such as plastic or metal. Presently, metal is the material of choice.[0004]This invent...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): A61F2/06
InventorBROWN, BRIAN J.
OwnerBOSTON SCI SCIMED INC