| 主权项 |
1. A stent comprising:
a wire braided into a tubular body comprising a proximal tube portion, a distal tube portion, a central tube portion disposed between the proximal tube portion and the distal tube portion, and a lumen extending between the proximal tube portion and the distal tube portion; both the proximal tube portion and the distal tube portion each comprises a flange, each flange having an inner flange end, a central flange portion, and an outer flange end terminating in crowns, each flange having a diameter that is greater than the central tube portion; the inner flange ends and the central tube portion each having an initial wire profile; each central flange portion comprising a wire second portion, each wire second portion having a wire profile smaller than the initial wire profile; and the crowns on each flange comprising a wire first portion, each wire first portion having a wire profile smaller than the initial wire profile and smaller than the wire profiles of the wire second portions; wherein the wire profile of each wire first portion is smaller than the initial wire profile by a first electropolished reduction amount; the wire profile of each wire second portion is smaller than the initial wire profile by a second electropolished reduction amount; each wire first portion and each wire second portion has an electropolished surface; and the initial wire profile is maintained constant from the central tube portion to the inner flange end; and wherein a radial force exerted from the stent is tailored to the surrounding tissue, with the radial force at each wire first portion being less than the radial force at each wire second portion. |
