Patent ID: 8372141

Claim:
A stent, comprising: a metallic tubular member cut into features having widths, lengths and thicknesses, including struts and defining a circumference, a longitudinal axis and a radial axis; and a barb, the barb including an anchor portion and a shape set twisted neck, the shape set twisted neck being biased and configured to twist along its length, rotating the barb radially outward relative to the longitudinal axis of the tubular member, the barb being a part and extending from an intersection of struts forming the stent, the shape set twisted neck cut from the tubular member with a predetermined width and twisted about 90 degrees such that its width becomes its thickness, thereby increasing its strength, the tubular member and the barb being a one-piece, unitary structure, said stent and barb together defining three axes, an X-axis extending tangential to a circumference of said stent, a Y-axis extending radially outward from the circumference of said stent, and a Z-axis extending through said neck portion of said barb, and said neck portion is shape set biased to twist along said Z-axis.