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US 2024/0261082 A1Published application
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
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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.
Claims1
A system comprising:
- a first shape memory polymer (SMP), the first SMP including a SMP foam;
- a second SMP;
- wherein the SMP foam:
- (a)(i) is an open cell foam, (a)(ii) is biodegradable, (a)(iii) includes a first channel, and (a)(iv) includes a reaction product of a diisocyanate, triethanolamine (TEA), and hydroxypropyl ethylenediamine (HPED);
- wherein the second SMP:
- (b)(i) is a cylindrical stent having a first strut that includes the second SMP and a second strut that includes the second SMP, (b)(ii) includes a second channel, and (b)(iii) is included in the first channel;
- wherein:
- (c)(i) the SMP foam is in a first state;
- and (c)(ii) the SMP foam is configured to expand to a second state, radially outward from the second SMP, in response to thermal stimulus;
- wherein the first SMP is crimped and the second SMP is crimped;
- wherein the SMP foam has a glass transition temperature (Tg) between 30° C. and 86° C.;
- wherein the SMP foam is a thermoset polyurethane polymer;
- wherein the first SMP is coupled to a wire and the second SMP is coupled to the wire.
10 more elements
Dependencies are inferred from the claim text.