Stent-graft-membrane and method of making the same
DCFirst Claim
1. A body compatible endroprosthesis, including:
- a tubular body including a tubular structural mesh layer;
the tubular body further including a graft layer formed of a graft material and having a graft layer surface that forms an inside surface of the tubular body and defines a fluid passage in the tubular body, said graft layer having a first average permeability within a range from about 50 cc/cm2 /min. to about 5,000 cc/cm2 /min. at 120 mm Hg and being biocompatible with a first fluid contained in the fluid passage; and
the tubular body further including a membrane layer formed of a membrane material, substantially surrounding the graft layer, and having a second average permeability less than the first average permeability.
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Abstract
A braided self-expandable stent-graft-membrane made of elongated members forming a generally tubular body. A membrane layer and graft layer are disposed on a endoprosthesis such as a stent. The membrane layer is substantially impermeable to fluids. The outermost layer is biocompatible with the body tissue. The innermost layer is biocompatible with the fluid in the passage. An embodiment includes a graft layer disposed on the inside of a stent and a membrane layer disposed on the outside of the stent. The innermost layer is biocompatible with the fluid in the passage. The stent-graft-membrane is used at a treatment site in a body vessel or organ where it is desirous to exclude a first fluid located outside the endoprosthesis from reaching a second fluid located in the lumen. The membrane may be made of silicone or polycarbonate urethane. The graft may be braided, woven, spun or spray-cast PET, PCU, or PU fibers. The layers may include ePTFE or PTFE.
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Citations
44 Claims
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1. A body compatible endroprosthesis, including:
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a tubular body including a tubular structural mesh layer; the tubular body further including a graft layer formed of a graft material and having a graft layer surface that forms an inside surface of the tubular body and defines a fluid passage in the tubular body, said graft layer having a first average permeability within a range from about 50 cc/cm2 /min. to about 5,000 cc/cm2 /min. at 120 mm Hg and being biocompatible with a first fluid contained in the fluid passage; and the tubular body further including a membrane layer formed of a membrane material, substantially surrounding the graft layer, and having a second average permeability less than the first average permeability. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An implantable endoprosthesis including:
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a tubular mesh structure; a tubular first graft layer surrounded by the mesh structure; a tubular second graft layer surrounding the first graft layer; and a membrane material applied to a selected one of the first and second graft layers, thus to provide in the selected graft layer a first average permeability less than a second average permeability of the other graft layer. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 32, 33, 43, 44)
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28. An implantable endroprosthesis comprising:
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a tubular mesh structure having a longitudinal passage extending therethrough; a membrane consisting essentially of a porous layer formed of a graft material and coated with a membrane material disposed on at least a portion of the outside of the tubular mesh structure; a graft layer disposed on at least a portion of the inside of the tubular mesh structure; wherein the graft layer has a first average permeability and is adapted for containing a first fluid in the passage, and the membrane has a second average permeability less than the first average permeability, and is adapted for isolating the first fluid in the passage from a second fluid located outside the passage. - View Dependent Claims (29, 30, 31)
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34. A process for making an implantable endroprosthesis, including:
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providing a tubular mesh structure; forming a graft layer of a graft material with a first average permeability, and disposing the graft layer along an inside surface of the tubular mesh structure; and forming a membrane layer by disposing a porous layer of a graft material along an outside surface of the tubular mesh structure and coating the porous layer with a membrane material, said membrane layer having a second average permeability less than the first average permeability of the graft layer. - View Dependent Claims (35)
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36. A body compatible endroprosthesis, including:
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a tubular body including a tubular structural mesh layer; the tubular body further including a graft layer formed of a graft material and having a graft layer surface that forms an inside surface of the tubular body and defines a fluid passage in the tubular body, said graft layer having a first average permeability and being biocompatible with a first fluid contained in the fluid passage; and the tubular body further including a membrane layer formed of a membrane material, substantially surrounding the graft layer, and having a second average permeability less than the first average permeability of at most about 100 cc/cm2 /min. at 120 mm Hg. - View Dependent Claims (37, 38, 39, 40, 41, 42)
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Specification