Patent Number: 6,254,632

Title: Implantable medical device having protruding surface structures for drug delivery and cover attachment

Abstract: A method for forming an implantable medical device, such as a stent, covered stent, or synthetic stent graft, is provided. Protruding structures are formed on a surface of the device. The protruding structures have a central depression region surrounded by a lip. The protruding structures can have a variety of shapes, including circular and ovular shapes, or the protruding structure can form a groove. The protruding structures can be used to engage a cover. Glue can be added to the protruding structures to help secure the cover. The protruding structures can also contain a therapeutic substance or substances for release in situ. The protruding structures can be formed using a laser discharge to create a hole in the stent surface followed by directing a pressurized stream of grit at the surface.

Inventors: Wu; Steven Z. (Santa Clara, CA), Harish; Sameer (Fremont, CA), Sanders-Millare; Deborra (San Jose, CA), Guruwaiya; Judy A. (San Jose, CA)

Assignee: Advanced Cardiovascular Systems, Inc.

International Classification: A61F 2/06 (20060101); A61F 2/00 (20060101); A61F 002/06 ()

Expiration Date: 07/03/2018