Variable zone high metal to vessel ratio stent and method

摘要

A variable zone high metal to vessel ratio stent includes a proximal high metal to vessel ratio zone, a central low metal to vessel ratio zone, and a distal high metal to vessel ratio zone. The proximal high metal to vessel ratio zone is deployed with fixation and sealing to healthy tissue of a main vessel superior to branch vessels and an aneurysm. The central low metal to vessel ratio zone is deployed directly on ostai of the branch vessels. However, as the central low metal to vessel ratio zone is highly permeable, blood flows from the main vessel through the central low metal to vessel ratio zone and into branch vessels.

主权项

1. A prosthesis comprising:
a first high metal to vessel ratio zone having first serpentine rings and defining a high metal to vessel ratio within a range of 30 percent to 80 percent, the first high metal to vessel ratio zone located at a first end of the prosthesis; a second low metal to vessel ratio zone having second serpentine rings and defining a low metal to vessel ratio less than 30 percent; and a third high metal to vessel ratio zone having third serpentine rings and defining a high metal to vessel ratio within the range of 30 percent to 80 percent, the third high metal to vessel ratio zone located at a second end of the prosthesis; wherein the first high metal to vessel ratio zone, the second low metal to vessel ratio zone, and the third high metal to vessel ratio zone are integral, and wherein the second low metal to vessel ratio zone is located between the first high metal to vessel ratio zone and the third high metal to vessel ratio zone.