Biodegradable stent
AssigneeBoston Scientific Scimed, Inc.
InventorsKarim Tarabein, James J. Scutti
Life of this patent
Estimating the term…
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 first end and a second end, the tubular scaffold including:
- a plurality of filaments extending between the first end and the second end, the plurality of filaments defining a first tubular biodegradable region and a second tubular biodegradable region;
- the first tubular biodegradable region positioned at a discrete location longitudinally adjacent to the second tubular biodegradable region such that the first tubular biodegradable region is located closer to the first end than the second tubular biodegradable region, wherein each of the first tubular biodegradable region and the second tubular biodegradable region defines a tubular region extending circumferentially entirely around a lumen of the tubular scaffold;
- wherein the plurality of filaments defining the first tubular biodegradable region includes a plurality of first biodegradable portions arranged around the tubular region of the first tubular biodegradable region, and wherein the plurality of filaments defining the second tubular biodegradable region includes a plurality of second biodegradable portions arranged around the tubular region of the second tubular biodegradable region;
- wherein the first biodegradable portions of the plurality of filaments located within the first tubular biodegradable region are configured to degrade at a first rate of degradation;
- wherein the second biodegradable portions of the plurality of filaments located within the second tubular biodegradable region are configured to degrade at a second rate of degradation;
- and
- wherein the first rate of degradation is faster than the second rate of degradation such that the first tubular biodegradable region having the first biodegradable portions fully degrades faster than the second tubular biodegradable region having the second biodegradable portions.
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 biodegradable material is located in a plurality of discontinuous regions within the first biodegradable material.
Dependencies are inferred from the claim text.