Drug delivery endovascular stent and method of use

US9579424B2 · kind B2 · utility

Assignee

• Biosensors International Group, Ltd. · BM

Inventors

• Douglas R. Savage · Del Mar, US
• John E. Shulze · Thousand Oaks, US
• Ronald E. Betts · Village of La Jolla, US
• Sepehr Fariabi · Fremont, US
• Shih-Horng Su · Westford, US

Key dates

• Filing date: Jul 20, 2012
• Grant date: Feb 28, 2017
• Expiry date: Nov 27, 2034

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61L2420/02
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An improvement in drug-eluting stents, and method of their making, are disclosed. The surface of a metal stent is roughened to have a surface roughness of at least about 20 μin (0.5 μm) and a surface roughness range of between about 300-700 μin (7.5-17.5 μm). The roughened stent surface is covered with a polymer-free coating of a limus drug, to a coating thickness greater than the range of surface roughness of the roughened stent surface.