COATED STENT

• US 20110268866A1
• Filed: 08/25/2009
• Published: 11/03/2011
• Est. Priority Date: 08/28/2008
• Status: Active Grant

• Current Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Original Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Inventors: Parker, Fred T.
• Granted Patent: US 8,679,572 B2
• Time in Patent Office: Days
• US Class Current: 427/2.3
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/072 Encapsulated stents, e.g. wire or whole stent embedded in lining
• CPC Class Codes: A61F 2240/001 Designing or manufacturing processes

Abstract

A coated stent (20) for use in a medical procedure and methods of manufacturing the coated stent (20) are described. A stent component (30) has an expanded state in which an inner diameter (d_s) of the stent (30) is less than or equal to an outer diameter (d_c2) of a coating (40), thereby causing an inner surface (35) of the stent (30) to engage the outer surface (42) of the coating (40). In one exemplary method of manufacture, the stent (30) is disposed over the coating (40) when the coating (40) is provided with a first, smaller outer diameter (d_c1). The coating (40) then is radially expanded to a second, larger outer diameter (d_C2), which is greater than or equal to the inner diameter (d_s) of the stent (30), to cause the outer surface (42) of the coating (40) to engage the inner surface (35) of the stent (30).

Claims

1-25. -25. (canceled)

26. A method for coupling a stent to a polymeric coating for delivery of one or more therapeutic agents, the method including:

aligning at least a portion of a polymeric coating over a balloon of a balloon catheter;

softening at least a portion of the polymeric coating to facilitate expansion of the polymeric coating from a first state having a first outer diameter to a second state having a second outer diameter;

aligning a stent at least partially over the polymeric coating when the polymeric coating is in the first state;

inflating the balloon to expand the polymeric coating from the first state to the second state, thereby causing the outer surface of the polymeric coating to engage the inner surface of the stent;

maintaining inflation of the balloon for a predetermined period of time to permit the polymeric coating to become secured to the inner surface of the stent; and

deflating the balloon.

27. A method as claimed in claim 26, wherein an inner diameter of the stent in its expanded state is less than or equal to the second outer diameter of the polymeric coating at least partially to embed the inner surface of the stent into the outer surface of the polymeric coating.

28. A method as claimed in claim 27, wherein no separate step of coating the outer surface of the stent is carried out.

29. A method as claimed in claim 26, wherein the step of softening at least a portion of the polymeric coating includes exposing at least a portion of the polymeric coating to a solvent.

30. A method as claimed in claim 29, wherein the solvent includes dimethyacetamide.

31. A method as claimed in claim 26 further comprising using a thermal technique at least partially to melt the polymeric coating to facilitate expansion of the polymeric coating to the second outer diameter and/or embedding of the stent into the outer surface of the polymeric coating.

32. A method as claimed in claim 26, wherein the stent includes a shape-memory material that is preconfigured to self-deploy to the expanded state, the method including expanding the polymeric coating into engagement with the stent and temporarily mechanically expanding the diameter of the stent beyond the preconfigured expanded state.