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Tectorial membrane stent and membraneous material

A technology of covered stent and membrane material, which is applied in medical science, surgery, coating, etc., can solve the problems of affecting the treatment effect, shortening the radial direction, unable to completely cover the diseased blood vessels, etc., and achieve the effect of improving the treatment effect.

Inactive Publication Date: 2011-08-03
SHANGHAI MICROPORT MEDICAL (GROUP) CO LTD
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Problems solved by technology

The single-layer ePTFE can only expand radially and radially, which leads to radial shortening of the stent graft when it is released and expanded in the blood vessel, so that it cannot completely cover the diseased blood vessel and affect the treatment effect

Method used

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  • Tectorial membrane stent and membraneous material
  • Tectorial membrane stent and membraneous material
  • Tectorial membrane stent and membraneous material

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Embodiment Construction

[0023] The present invention provides a stent graft, comprising a stent section and a covering film covering the stent section; wherein the covering film is composed of at least two layers of anisotropic composite expanded polytetrafluoroethylene.

[0024] According to the present invention, the stent graft includes a stent segment and a membrane covering the stent segment. The present invention has no special restrictions on the shape of the stent graft, preferably a shape well known to those skilled in the art, including but not limited to straight tube type stent graft, network tube type stent graft and branched stent graft. The present invention has no special restrictions on the material of the stent segment, and it is preferably a material well-known to those skilled in the art, including but not limited to metal and high molecular polymer. The present invention does not have any special restrictions on the coating method of the membrane and the stent segment, preferably th...

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Abstract

The invention provides a tectorial membrane stent. The tectorial membrane stent comprises a stent section and a tectorial membrane coated on the stent section, wherein the tectorial membrane consists of at least two layers of incongruously compound expanded polytetrafluoroethylene (ePTFE). The invention also provides a membraneous material, which comprises at least two layers of incongruously compound ePTFE. Compared with the prior art, the tectorial membrane of the tectorial membrane stent provided by the invention consists of the at least two layers of incongruously compound ePTFE; and the pore spaces of all the layers of ePTFE have different sizes and directions. When the tectorial membrane stent is released, nodes of all the layers of ePTFE are radioactively extended towards different directions, and the defect of shortened filamentary fibers among the nodes is overcome, so that the tectorial membrane stent of the tectorial membrane formed by more layers of ePTFE are radioactively expended towards multiple directions, the phenomenon of radial shortening can be prevented, and treatment effects can be improved.

Description

Technical field [0001] The invention relates to a minimally traumatic interventional medical device product, in particular to a covered stent and a membrane material. Background technique [0002] The traditional method of aneurysm treatment is to clip and remove the aneurysm through craniotomy microsurgery, but this type of surgery is traumatic and has a high risk. Intravascular interventional therapy has the advantages of less trauma, fewer complications, high safety, and less patient suffering, and has gradually become the main method for treating aneurysms. [0003] The prior art has disclosed a variety of intravascular interventional treatment methods, among which the stent graft method is a commonly used method. The stent graft method is mainly to deliver the stent graft in a compressed state to the location of the vascular disease, and release it after accurate positioning. The expanded stent graft will cover the diseased blood vessel, isolate the vascular disease site and ...

Claims

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Application Information

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IPC IPC(8): A61L31/10A61L31/14
Inventor 谢志永李雨金巧蓉王森罗七一
Owner SHANGHAI MICROPORT MEDICAL (GROUP) CO LTD
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