Composite material endoprosthesis

Details Composite material endoprosthesis Composite material endoprosthesis

A - Human Necessities

61

L

A61L 27/00 (2006.01) A61F 2/06 (2006.01) A61L 27/04 (2006.01) A61L 27/40 (2006.01) A61L 27/50 (2006.01) A61L 31/02 (2006.01) A61L 31/18 (2006.01)

Patent

CA 2267728

An endoprosthesis includes a body structure formed of a biocompatible material, the body structure including a first material having an average atomic number greater than 24 and a second material that is different than the first material. The body structure has a mass absorption coefficient effective to provide a ratio of an intensity of an incident X-ray to an intensity of a transmitted X--ray in a range of 1e-2 to 1e-4. The endoprosthesis may have a yield strength not greater than 100,000 psi. The endoprosthesis may be in the form of a wire or a tube. In one embodiment the first material is present in an amount not greater than 9% by volume based on the combined volume of the first and second materials. In another embodiment, about 30 to about 40% by volume of the first material is present based on a combined volume of the first and second materials in an endoprosthesis of tubular form.

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