Biodegradable stent
AssigneeBoston Scientific Scimed, Inc.
InventorsKARIM TARABEIN, JAMES J. SCUTTI
Life of this patent
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Abstract
Medical stent designs are disclosed. An example stent includes a tubular scaffold having a proximal end and a distal end. The tubular scaffold includes a first filament extending between the proximal end and the distal end, the first filament including a first biodegradable region positioned adjacent to a second biodegradable region. Further, the first biodegradable region includes a first biodegradable material, the first biodegradable material having a first rate of degradation. The second biodegradable region includes a second biodegradable material, the second biodegradable material having a second rate of degradation, wherein the first rate of degradation is different from the second rate of degradation.
Claims20
A stent, comprising:
- a tubular scaffold having a proximal end and a distal end, the tubular scaffold including:
- a first filament extending between the proximal end and the distal end, the first filament including a first biodegradable region positioned adjacent to a second biodegradable region;
- wherein a portion of the first filament within the first biodegradable region has a first rate of degradation;
- wherein a portion of the first filament within the second biodegradable region has a second rate of degradation;
- wherein the first rate of degradation is different from the second rate of degradation.
A stent, comprising:
- a tubular scaffold having a proximal end and a distal end, the tubular scaffold including:
- a first filament extending between the proximal end and the distal end;
- a second filament extending between the proximal end and the distal end, wherein the first filament crosses the second filament at a first activation site;
- and
- an activation material including a first catalyst disposed along the first activation site, wherein the first catalyst is configured to dissolve portions of the first and second filaments in contact with the first catalyst at a faster rate than portions of the first and second filaments which are devoid of the catalyst.
A stent, comprising;
- a tubular scaffold having a proximal end and a distal end, the tubular scaffold including:
- a plurality of filaments extending between the proximal end and the distal end, each filament including:
- a first biodegradable material having a first rate of degradation;
- a second biodegradable material having a second rate of degradation;
- wherein the first rate of degradation is faster than the second rate of degradation;
- wherein the second biodegradable material is surrounded by the first biodegradable material;
- and
- wherein the second material is located in a plurality of discontinuous regions within the first biodegradable material.
Dependencies are inferred from the claim text.