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US 10,478,323 B2Granted
Biodegradable stent and shape memory expanding method therefor
AssigneeSuntech, Inc.
InventorsHyungil Kim, Hyun Hee Han
Life of this patent
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Abstract
The present invention relates to a biodegradable stent and a shape memory extending method thereof. According to an exemplary embodiment of the present invention, radial force of a biodegradable stent may be largely increased through the shape memory extending method of the biodegradable stent and the number of cracks may be decreased after crimping and stent inflation.
Claims11
A shape memory extending method of a biodegradable stent, comprising:
- providing a stent made of a biodegradable polymer on an external surface of a balloon of a first balloon catheter;
- extending an outer diameter of the stent by applying a first pressure to the balloon of the first balloon catheter to produce a stent with an extended outer diameter;
- providing the stent with the extended outer diameter on an external surface of a balloon of a second balloon catheter;
- and
- reducing the extended outer diameter of the stent, by crimping the stent while applying a second pressure to the balloon of the second balloon catheter;
- wherein the step of extending the outer diameter of the stent is conducted at a temperature range of 55 to 180° C.;
- and
- wherein the second balloon catheter is provided in crimping equipment.
5 more elements
Dependencies are inferred from the claim text.