Fiber reinforced composite stents

a composite stent and fiber technology, applied in the field of radially expandable implantable medical devices, can solve the problems of insufficient radial strength, the stent strut or bar arm can crack, and the localized portions of the stent pattern subject to substantial deformation tend to be the most vulnerable to failure, so as to reduce the effect of reducing the radial profile of the tub

Inactive Publication Date: 2007-02-15
ABBOTT CARDIOVASCULAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0034] Certain embodiments of the present invention are directed to a radially expandable stent woven from at lease two types of fibers. A first fiber may include a first polymer and the second fiber may include a second polymer. The first polymer may have a softening temperature lower than a softening temperature of the second polymer. At least some of the fibers may have a flattened radial profile that reduces

Problems solved by technology

Inadequate radial strength potentially contributes to a relatively high incidence of recoil of polymeric stents after implantation into vessels.
Another potential problem with polymeric stents is that their struts or bar arms can crack during crimping and expansion, especially for brittle polymers.
The localized portions of the stent pattern subjected to substantial deformation tend to be the most vulnerabl

Method used

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Embodiment Construction

[0059] Various embodiments of the present invention relate to composite polymeric biodegradable implantable medical devices and methods of making such devices. In general, a composite implantable medical device is a device which is made up of two or more macroscopically distinct materials that have different properties. The composite device as a whole may have desirable properties of two or more of the distinct materials. Therefore, desirable mechanical and / or degradation properties may be obtained through the use of a polymer composite structure.

[0060] For the purposes of the present invention, the following terms and definitions apply:

[0061] The “glass transition temperature,” Tg, is the temperature at which the amorphous domains of a polymer change from a brittle vitreous state to a solid deformable or ductile state at atmospheric pressure. In other words, the Tg corresponds to the temperature where the onset of segmental motion in the chains of the polymer occurs. When an amor...

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Abstract

Polymeric composite stents reinforced with fibers for implantation into a bodily lumen are disclosed.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] This invention relates to radially expandable implantable medical devices such as stents for implantation into a bodily lumen. In particular, the invention relates composite stents reinforced with fibers. [0003] 2. Description of the State of the Art [0004] This invention relates to radially expandable endoprostheses, which are adapted to be implanted in a bodily lumen. An “endoprosthesis” corresponds to an artificial device that is placed inside the body. A “lumen” refers to a cavity of a tubular organ such as a blood vessel. [0005] A stent is an example of such an endoprosthesis. Stents are generally cylindrically shaped devices, which function to hold open and sometimes expand a segment of a blood vessel or other anatomical lumen such as urinary tracts and bile ducts. Stents are often used in the treatment of atherosclerotic stenosis in blood vessels. “Stenosis” refers to a narrowing or constriction of the diamet...

Claims

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Application Information

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IPC IPC(8): A61F2/88A61F2/90B29C47/20B29C48/09B29C48/10B29C48/18B29C48/32
CPCA61F2/90A61F2/91A61F2/915A61F2002/91508A61F2002/91575A61F2250/0098A61F2230/0013B23K26/4065A61F2/04A61F2/06A61F2002/072A61F2210/0076A61F2220/005A61L31/129B23K2103/50B29C2043/028B29C53/583B29C43/02B29C59/02B29C53/566B29C59/021D03D3/02B23K2103/42B29C48/10B29C48/18B29C48/022B29C48/0022B29C48/09B29C48/2886A61F2210/0004A61F2210/0009B23K26/50B23K26/402B29C45/0001B29C45/0005B29C45/0055B29K2101/00B29K2105/12B29K2267/043B29K2995/0056B29K2995/006B29L2023/003B29L2031/7546
Inventor HUANG, BINGALE, DAVID C.SRIDHARAN, SRINIVASANCALLOL, JOSEPH R.KLEINE, KLAUSHOSSAINY, SYED F. A.LIMON, TIMOTHY A.ABBATE, ANTHONY J.
Owner ABBOTT CARDIOVASCULAR
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