Hollow drug-filled stent and method of forming hollow drug-filled stent

摘要

A stent is formed from a wire that in cross-section includes an outer member having a lumen and a radiopaque core member partially filling the lumen. A substance for elution through openings formed through the outer member fills the portion of the lumen not filled by the radiopaque core member. In a method of forming the stent, a composite wire including an outer member and a dual core member is shaped into a stent pattern. The dual core member includes a first core member and a second, radiopaque core member. The shaped composite wire is processed to remove the first core member from the outer member without adversely affecting the outer member and the second core member. The portion of the lumen that was occupied by the first core member may be filled with a substance for elution through openings from through the outer member to the lumen.

主权项

1. A stent comprising:
a wire formed into stent pattern, wherein a cross-section of the wire includes, an outer member having a lumen, a radiopaque member disposed within and filling a first portion of the lumen, and a biologically or pharmacologically active substance disposed in a second portion of the lumen; and at least one opening disposed through the outer member through to the second portion of the lumen.