Patent ID: 6719784
Filing Date: 2004-04-13
Classification: A61F,Y10S,Y10T

Abstract:
A prosthesis comprising:a first ePTFE tube in a helically twisted state oriented in a first rotational direction, wherein said first tube having been twisted from an initial state, with a first point on a first end of said first tube being longitudinally aligned along a first longitudinal reference axis with a second point on a second end of said first tube, to said helically twisted state, with at least one of said first and second points having been angularly displaced from said first longitudinal reference axis; and, a second ePTFE tube disposed coaxially within said first tube, said second tube being in a helically twisted state oriented in a second rotational direction different from said first rotational direction, wherein said second tube having been twisted from an initial state, with a first point on a first end of said second tube being longitudinally aligned along a second longitudinal reference axis with a second point on a second end of said second tube, to said helically twisted state, with at least one of said first and second points having been angularly displaced from said second longitudinal reference axis.