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US 8,999,369 B2Granted
Method of making polymer-bioceramic composite implantable medical devices from a suspension solution of bioceramic particles
AssigneeAbbott Cardiovascular Systems Inc.
InventorsDavid C. Gale, Yunbing Wang, Syed Faiyaz Ahmed Hossainy, Bin Huang, Garth L. Wilkes, Vincent J. Gueriguian
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Abstract
Methods and devices relating to polymer-bioceramic composite implantable medical devices, such as stents are disclosed. A suspension solution is formed including a fluid, a biodegradable polymer, and bioceramic particles. The biodegradable polymer and particles are precipitated from the suspension to form a mixture. A composite is formed by combining the mixture with another polymer and a scaffolding is formed from the composite.
Claims11
A method for fabricating a stent comprising:
- forming a suspension solution including a fluid, a biodegradable polymer and bioceramic particles, wherein the polymer is dissolved in the fluid, and wherein the bioceramic particles are dispersed in the solution;
- combining the suspension solution with a second fluid, wherein the second fluid is a poor solvent for the polymer;
- allowing at least some of the polymer to precipitate upon combining the suspension solution with the second fluid, wherein at least some of the bioceramic particles precipitate with the precipitated polymer to form a composite mixture;
- and
- fabricating a scaffolding including a pattern of interconnecting struts from the composite mixture,
- wherein the composite mixture is between 0.01% and 10% bioceramic particles by weight as compared to the polymer of the composite.
3 more elements
Dependencies are inferred from the claim text.