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US 9,039,733 B2Granted
Shape memory polymer foams for endovascular therapies
AssigneeLawrence Livermore National Security, LLC
InventorsThomas S. Wilson, Duncan J. Maitland
Life of this patent
Estimating the term…
Abstract
A system for occluding a physical anomaly. One embodiment comprises a shape memory material body wherein the shape memory material body fits within the physical anomaly occluding the physical anomaly. The shape memory material body has a primary shape for occluding the physical anomaly and a secondary shape for being positioned in the physical anomaly.
Claims20
An apparatus comprising:
- a delivery wire;
- a first shape memory polymer device coupled to the delivery wire, having a first state and a second state, said first shape memory polymer device composed of a polyurethane shape memory polymer foam with an open cell foam structure, said first shape memory polymer device adapted to be positioned in an interior of a physical anomaly;
- a second expandable device, said second expandable device coupled to the delivery wire, said second expandable device having a first collapsed state and a second expanded state to withdraw the shape memory polymer foam from the physical anomaly;
- and
- a detachment device adapted to detach the first shape memory polymer device from the delivery wire;
- said first shape memory polymer device and said second expandable device forming a shape memory material system to position the shape memory polymer foam in the interior of the physical anomaly and withdraw the shape memory polymer foam from the interior of the physical anomaly;
- wherein said delivery wire and said first shape memory polymer device are adapted to be located in the interior of the physical anomaly;
- wherein said first shape memory polymer device in said first state is adapted to be positioned in the interior of the physical anomaly;
- wherein said first shape memory polymer device is adapted to be expanded to the second state in the interior of the physical anomaly to conform to at least a portion of the physical anomaly to occlude the physical anomaly based on heat;
- and
- wherein said second expandable device is distal to said shape memory polymer foam in said first collapsed state and is adapted to be expanded and be in said second state to withdraw the shape memory polymer foam from the physical anomaly.
8 more elements
An endovascular therapy apparatus, adapted to occlude a physical anomaly with a shape memory polymer foam and withdraw the shape memory polymer foam from the physical anomaly, comprising:
- a guidance wire;
- a first shape memory polymer device that includes a shape memory polymer foam composed of a polyurethane shape memory polymer with an open cell foam structure, coupled to the guidance wire, having a first state and a second state, said first shape memory polymer device adapted to be positioned in the physical anomaly;
- a second shape memory device coupled to the guidance wire, having a first collapsed state and a second expanded state for withdrawing the shape memory polymer foam from the physical anomaly;
- said first shape memory polymer device and said second shape memory device forming a shape memory material means for positioning in the physical anomaly and withdrawing from the physical anomaly;
- and
- a heating system coupled to the guidance wire;
- wherein said guidance wire moves said shape memory material means to be located in an interior of the physical anomaly,
- with said first shape memory polymer device in the first state, said first shape memory polymer device is adapted to be expanded to the second state in the interior of the physical anomaly;
- and
- said second shape memory device is adapted to be extended through said shape memory polymer foam in said first collapsed state and is adapted to be expanded to said second expanded state in the interior of the physical anomaly based on heat from said heating system for withdrawing the shape memory polymer foam from the physical anomaly.
7 more elements
An apparatus, adapted to occlude a physical anomaly with a shape memory polymer foam and withdraw the shape memory polymer foam from the physical anomaly, comprising:
- a guidance wire;
- a first shape memory polymer device:
- (a)(i) coupled to the guidance wire, (a)(ii) having first and second states, (a)(iii) comprising a polyurethane shape memory polymer foam with an open cell foam structure, (a)(iv) adapted to be positioned in the physical anomaly;
- a second shape memory device:
- (b)(i) coupled to the guidance wire, (b)(ii) having a first collapsed state and a second expanded state, the second expanded state adapted to withdraw the shape memory polymer foam from the physical anomaly;
- and
- a detachment device adapted to detach the first shape memory polymer device from the guidance wire;
- wherein the first shape memory polymer device is adapted to be:
- (c)(i) in the first state positioned in an interior of the physical anomaly, and (c)(ii) expanded to the second state in the physical anomaly to occlude the physical anomaly based on heat;
- wherein the second shape memory device is adapted to be expanded to the second expanded state in the physical anomaly and withdraw the shape memory polymer foam from the physical anomaly.
7 more elements
Dependencies are inferred from the claim text.