Preferentially Electropolished Stent System and Method of Manufacture
AssigneeMedtronic Vascular, Inc.
InventorsRui Lam, Dustin Thompson
Life of this patent
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Abstract
The preferentially electropolished stent system and method of manufacture includes a stent delivery system including a catheter; a balloon operably attached to the catheter; and a stent disposed on the balloon. The stent includes an elongate body having an abluminal surface and a luminal surface; wherein the abluminal surface has an abluminal average roughness less than or equal to 0.030 microns; and the luminal surface has at least one rough portion having an luminal average roughness greater than or equal to 0.036 microns.
Claims30
A stent delivery system comprising:
- a catheter;
- a balloon operably attached to the catheter;
- and
- a stent disposed on the balloon;
- wherein the stent comprises:
- an elongate body having an abluminal surface and a luminal surface;
- wherein the abluminal surface has an abluminal average roughness less than or equal to 0.030 microns;
- and
- the luminal surface has at least one rough portion having an luminal average roughness greater than or equal to 0.036 microns.
A stent comprising:
- an elongate body having an abluminal surface and a luminal surface;
- wherein the abluminal surface has an abluminal average roughness less than or equal to 0.030 microns;
- and
- the luminal surface has at least one rough portion having a roughness an luminal average roughness greater than or equal to 0.036 microns.
A method of manufacturing a stent comprising:
- providing an electropolishing apparatus having a DC source, an electrolyte bath, and an electrode, the DC source having a positive terminal and a negative terminal, the negative terminal being operably connected to the electrode, the electrode being located in the electrolyte bath;
- preparing a rough stent for electropolishing;
- operably connecting the rough stent to the positive terminal of the DC source, the rough stent having an abluminal surface and a luminal surface;
- placing the rough stent in the electrolyte bath;
- operating the electropolishing apparatus to preferentially remove surface material from the abluminal surface without removing surface material from at least a portion of the luminal surface to electropolish the abluminal surface while maintaining surface roughness on the at least a portion of the luminal surface to produce the stent.
Dependencies are inferred from the claim text.