Stent with expandable foam

Patent metadata

Field	Value
Publication number	US-10080642-B2
Application number	US-201514797973-A
Country	US
Kind code	B2
Filing date	Jul 13, 2015
Priority date	Oct 2, 2003
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

Abstract

A stent for treating a physical anomaly. The stent includes a skeletal support structure for expanding in the physical anomaly and a shape memory material coupled to the skeletal support structure.

First claim

The invention claimed is:

1. A system comprising:
a stent including a central lumen and first and second shape memory polymer (SMP) struts that each have a first state and a second state;
a SMP, coupled to the first and second struts, having a first state and a second state;
a heating system; and
a light diffuser included in the heating system;
wherein (a) in a position the stent is configured to be located, with the first and second struts in the first state and the SMP in the first state, proximate to a physiologic void; (b) in another position the SMP is configured to be expanded to the second state, radially outward from the first and second struts, and into the void; and (c) in an additional position the first and second struts are configured to be expanded to the second state;
wherein the diffuser includes another SMP.

2. The system of claim 1 comprising a core, included in the central lumen of the stent, configured to at least partially prevent the SMP from expanding radially inward from the first and second struts and completely blocking the central lumen.

3. The system of claim 1 comprising a SMP foam core, included in the central lumen of the stent, that is (a) coupled to a guidance wire, which includes one of a guide wire and a pusher wire, and (b) configured to be removed, along with the guidance wire, after the stent is implanted.

4. The system of claim 1 comprising a core included in the central lumen of the stent, wherein the core includes a SMP foam.

5. The system of claim 1 , wherein the first strut has a first transition temperature, to expand from the first state of the first strut, and the SMP has a second transition temperature, to expand from the first state for the SMP, unequal to the first transition temperature such that the first strut and the SMP are configured to expand to their respective second states at different temperatures.

6. The system of claim 1 wherein the diffuser is abraded.

7. The system of claim 1 wherein the diffuser is configured to diffuse light radially.

8. The system of claim 3 wherein the SMP foam core is permanently coupled to the diffuser.

9. The system of claim 8 wherein the SMP foam core is directly between the stent and the diffuser such that an axis, perpendicular to a long axis of the diffuser, intersects the diffuser, the SMP foam core, and the stent.

10. The system of claim 8 wherein the SMP foam core directly contacts both the diffuser and the stent.

11. A system comprising:
a stent including a central lumen and first and second shape memory polymer (SMP) struts that each have has a first state and a second state;
a SMP, coupled to the first and second struts, having a first state and a second state;
a heating system;
a light diffuser included in the heating system;
a SMP foam core, included in the central lumen of the stent, that is: (a) coupled to a guidance wire, which includes one of a guide wire and a pusher wire, and (b) configured to be removed, along with the guidance wire, after the stent is implanted;
wherein (a) in a position the stent is configured to be located, with the first and second struts in the first state and the SMP in the first state, proximate to a physiologic void; (b) in another position the SMP is configured to be expanded to the second state, radially outward from the first and second struts, and into the void; and (c) in an additional position the first and second struts are configured to be expanded to the second state.

12. The system of claim 11 wherein the diffuser is abraded.

13. The system of claim 11 wherein the diffuser is configured to diffuse light radially.

14. A system comprising:
a stent including a central lumen and first and second shape memory struts that each have a first state and a second state;
a shape memory polymer (SMP), coupled to the first and second struts, having a first state and a second state;
a heating system; and
a light diffuser included in the heating system;
wherein (a) in a position the stent is configured to be located, with the first and second struts in the first state and the SMP in the first state, proximate to a physiologic void; (b) in another position the SMP is configured to be expanded to the second state, radially outward from the first and second struts, and into the void; and (c) in an additional position the first and second struts are configured to be expanded to the second state;
wherein the diffuser includes another SMP.

15. The system of claim 14 comprising a core, included in the central lumen of the stent, configured to at least partially prevent the SMP from expanding radially inward from the first and second struts and completely blocking the central lumen.

16. The system of claim 14 comprising a SMP foam core, included in the central lumen of the stent, that is (a) coupled to a guidance wire, which includes one of a guide wire and a pusher wire, and (b) configured to be removed, along with the guidance wire, after the stent is implanted.

Assignees

• L Livermore Nat Security Llc
• Univ California

Inventors

• Wilson Thomas S
• Maitland Duncan J
• Small Iv Ward
• Buckley Patrick R
• Benett William J
• Hartman Jonathan
• Saloner David A

Classifications

• A61B17/12113

  within an aneurysm · CPC title

• A61B17/12022 Primary

  Occluding by internal devices, e.g. balloons or releasable wires (plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20) · CPC title

• A61B17/1214

  Coils or wires · CPC title

• A61B2017/00871

  polymeric · CPC title

• A61B2017/12054

  Details concerning the detachment of the occluding device from the introduction device · CPC title