METHODS FOR PROSTHETIC VALVES FORMED WITH ISOTROPIC FILTER SCREEN LEAFLETS
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Abstract
In one embodiment of the invention, a method of forming a prosthetic check valve is disclosed. The prosthetic check valve is formed of leaflets cut from filtration screen material with uniform pore size having openings with a dimension inclusively between fifteen and sixty microns. The screen material is made from biocompatible material, such as polyester or polypropylene. One or more outer edges of the leaflet are fused or sealed to prevent fraying of the material and to form a more non-thrombogenic surface. Prosthetic check valves assembled with the leaflets can be collapsed to a diameter of less than or equal to twenty-nine french (29 f), sterilized, and stored in a collapsed state. The collapsed valve can be implanted without prior rinsing to remove sterilant.
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Citations
65 Claims
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1-34. -34. (canceled)
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35. A method comprising:
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selecting an isotropic filtration screen having openings between fifteen and sixty microns wide such that the isotropic filtration screen is flexible and porous to a body fluid; selecting a predetermined valve size, and cutting the isotropic filtration screen into shapes of one or more prosthetic valve leaflets in response to the predetermined valve size. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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56. A method comprising:
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inserting, without rinsing, a valve structure into a mammal, the valve structure including one or more prosthetic valve leaflets formed out of an isotropic filter screen, wherein the one or more prosthetic valve leaflets have pores with a porosity that allows fluid leakage; operating the valve structure to deter the flow of fluid in one direction; and growing tissue onto the valve structure through the pores of the isotropic filer screen to reduce the porosity and leakage of fluid through the valve structure. - View Dependent Claims (57, 58, 59, 60, 61, 62, 63, 64)
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65-105. -105. (canceled)
Specification