Patent ID: 8875372
Filing Date: 2014-11-04
Classification: A61F,D04C,D10B,Y10T

Abstract:
1. A method of forming a stent comprising the steps of: providing a wire comprising a wire first portion and a wire second portion; wrapping the wire first portion around a mandrel thereby forming a first elongated tubular body comprising a first helical pattern; wrapping the wire second portion around the mandrel thereby forming a second elongated tubular body around the first elongated tubular body, wherein the second elongated tubular body comprises a second helical pattern comprising a pitch about opposite a pitch of the first helical pattern; wherein the first elongated tubular body and the second elongated tubular body together form a third elongated tubular body comprising a double helical pattern; heat-setting the third elongated tubular body such that it is biased to assume an expanded state from a compressed state; unwinding the wire second portion from the third elongated tubular body; unwinding the wire first portion from the third elongated tubular body; braiding the wire first portion and the wire second portion forming a stent wall comprising an elongated tubular body comprising a braided helical pattern; and heat-setting the stent wall such that it is biased to assume an expanded braided helical wire configuration.