Patent ID: 7996976

Claim:
A method, comprising: forming an elongated section having a first end portion and a second end portion and defining a lumen through at least a portion of the first end portion; coupling a first surface of a first retention member to an outer surface of the first end portion of the elongated section; and coupling a second retention member to the outer surface of the first end portion of the elongated section, the first retention member having a compressed configuration and an expanded configuration, the first retention member being biased in its expanded configuration, a second surface of the first retention member being a first distance from the first surface of the first retention member when the first retention member is in the compressed configuration, the second surface of the first retention member being a second distance greater than the first distance from the first surface of the first retention member when the first retention member is in the expanded configuration, the second surface of the first retention member being opposite the first surface of the first retention member when the first retention member is in the compressed configuration and when the first retention member is in the expanded configuration, the first retention member having a substantially uniform composition along an axis extending radially from the elongate section and intersecting the first surface of the first retention member and the second surface of the first retention member.