Patent ID: 8048144

Claim:
A prosthesis anchor assembly comprising: an anchor having: a single landing section configured to be secured at a fixed position in a body lumen, the single landing section having a first diameter that is substantially constant along the entire length of the single landing section; a docking section extending from the single landing section, configured such that the single landing section and the docking section form separate sections of the anchor, and having a wall of the docking section wherein a first portion of the wall immediately adjacent the landing section extends radially inwardly and has a second diameter, smaller than the first diameter, thereby defining an inwardly extending radial protrusion, the wall further having a second portion, such that the first portion extends between the second portion and the single landing section, the second portion having a third diameter, the third diameter being the same as the first diameter in an expanded condition; a single-layer mating prosthesis having an expanded configuration with a wall including a ridge defining a similar configuration as the inwardly extending radial protrusion, the wall having a larger diameter portion at least one side of the ridge and a smaller diameter at the ridge, the ridge of the prosthesis being engaged by the inwardly extending radial protrusion of the docking section of the anchor such that longitudinal movement of the prosthesis is prevented; and a permanent fixation configured to penetrate the single landing section and the body lumen to fix the anchor to the body lumen such that the separate single landing section is the only section of the anchor configured to touch and be fixed to the body lumen because the first portion of the wall of the docking section extends radially inwardly and has a second diameter, smaller than the first diameter, thereby defining an inwardly extending radial protrusion.