Patent ID: 7972261

Claim:
An anchor mechanism adapted to reduce a tendency for a structure to migrate and rotate after implantation of the structure into a patient, where the structure is one or more of a radioactive source, a thermal ablation implant, a spacer, a strand and a radiopaque marker, the anchor mechanism comprising: a sleeve adapted to fit around the structure; said sleeve having a bore that extends an entire longitudinal length of said sleeve, and through which the structure fits, such that a portion of the structure extends out from each longitudinal end of said sleeve; and two or more protrusions extending from an outer surface of said sleeve along at least a portion of the longitudinal length of said sleeve, said two or more protrusions each having a substantially squared profile formed by sidewalls extending along a portion of the longitudinal length and along a portion of a circumference of said sleeve, to form a space between said protrusions, at least along the longitudinal length of said sleeve, to receive surrounding patient tissue upon implantation of the structure into a patient, to thereby reduce a tendency for the structure to migrate and rotate after implantation; wherein the sidewalls from adjacent protrusions that form the space along the longitudinal length of the sleeve are about parallel to each other and substantially perpendicular to the longitudinal axis of the sleeve; wherein a thickness of said sleeve varies such that the thickness is greater where there are said two or more protrusions than where there is not a protrusion.