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US 12,310,835 B2Granted
Stent with expandable foam
AssigneesLawrence Livermore National Security, LLC, The Regents of the University of California
InventorsThomas S. Wilson, Duncan J. Maitland, Ward Small, IV, Patrick R. Buckley, William J. Benett, Jonathan Hartman, David Saloner
Life of this patent
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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.
Claims20
A system comprising:
- first and second shape memory polymers (SMPs);
- wherein the first SMP:
- (a) is a cross-linked, biodegradable foam that includes a first channel, (b) is in a first state and is configured to expand to a second state, radially outward from the second SMP, in response to thermal stimulus, (c) has a glass transition temperature (Tg) between 30° C. and 86° C.;
- and (d) is configured to have hysteresis corresponding to the Tg;
- wherein the second SMP:
- (a) is included in a frame having openings, a first strut that includes the second SMP, and a second strut that includes the second SMP, and (b) is included in the first channel;
- wherein the first and second SMPs are coupled to a wire;
- wherein the foam adheres to the second SMP via a polyurethane-based adhesive;
- wherein the first SMP is configured to extend within the openings when in the second state.
6 more elements
A system comprising:
- a first shape memory polymer (SMP) foam and a second SMP;
- a second foam coupled to the second SMP;
- wherein the first SMP foam:
- (a) is a cross-linked, biodegradable foam that includes a first channel, (b) is in a first state and is configured to expand to a second state, radially outward from the second SMP, in response to thermal stimulus, (c) has a glass transition temperature (Tg) between 30° C. and 86° C.;
- and (d) is configured to have hysteresis corresponding to the Tg;
- wherein the second SMP:
- (a) is included in a frame having a first strut that includes the second SMP and a second strut that includes the second SMP, and (b) is included in the first channel;
- wherein the first SMP foam and the second SMP are coupled to a wire;
- wherein the first SMP foam adheres to the second SMP via a polyurethane-based adhesive.
6 more elements
Dependencies are inferred from the claim text.