Stents that would collapse into non-convex structures

Description:

Reference #: 00832

Invention Description:

Dr. Arash Kheradvar has developed a type of stent that can be collapsed into a non-convex structure. This is accomplished by transforming the primary convex cross section of an expanded stent into a non-convex cross section when collapsed, thus reducing the overall profile size of a collapsed stent through minimizing the intra-stent space. A convex cross section is a polygonal shape with the interior as a convex set. A polygon that is not convex is called concave or reentrant. A concave polygon will always have an interior angle that measures greater than 180 degrees. As the number of interior angles measuring greater than 180 degrees increases, the overall shape approaches a fractal pattern. This shape transformation allows for the reduction of effective diameter (occupied cross section) in its collapsed state while preserving the circumference of the stent in its fully open, stretched state.

Potential Applications:

• Heart valves

• Coronary vasculature

• Patency of ureter

• Prostatic stent

• Drug eluting stent

• Peripheral artery angioplasty

• Endovascular surgery

 

Advantages and Benefits:

This invention would allow for the reduction of the effective diameter (occupied cross section) in its collapsed state while preserving the circumference of the stent in its fully open, stretched state.

Patent Information:
Title App Type Country Serial No. Patent No. File Date Issued Date Expire Date Patent Status
An expandable stent that collapses into a non-convex shape and expands into an expanded, convex shape Utility United States 13/082,191 8,702,788 4/7/2011 4/22/2014 10/29/2031  
For Information, Contact:
Technology Commercialization
University of South Carolina
technology@sc.edu
Inventors:
Arash Kheradvar
Morteza Gharib
Keywords:
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