Recoilable thrombosis filtering device and method
AssigneeSciMed Life Systems, Inc.
InventorsSteven E. Walak, Bernedette Proskoczilo, Kristian DiMatteo, Robert B. DeVries
Life of this patent
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Abstract
A thrombosis filter which can be securely affixed at a selected location in the vascular system of a patient and removed when no longer required, and method for removing the thrombosis filter. An embodiment of the thrombosis filter includes a plurality of struts made from a shape memory alloy which changes shape at a temperature other than body temperature, thereby allowing removal of the filter.
Claims2
A thrombus filter element for placement within a blood vessel lumen defined by a blood vessel wall comprising:
- a plurality of struts comprising a shape memory material;
- a plurality of anchoring elements disposed on a plurality of struts, wherein said anchoring elements engage said blood vessel wall;
- wherein the shape memory material has a selected temperature at which the struts change shape;
- wherein the struts are divided into a first grouping and a second grouping;
- wherein said first grouping and second grouping of said plurality of struts attach to a body portion;
- wherein said body portion includes at least one aperture, said second grouping of said struts radiate from within said aperture, said body portion further including a hooking means, wherein said hooking means comprises of a conducting material;
- and
- wherein said second grouping of said plurality of struts retract within said aperture when the temperature of said shape-memory material is generally lower than body temperature.
A thrombus filter element for placement within a blood vessel lumen defined by a blood vessel wall comprising:
- a plurality of struts comprising a shape memory material;
- a plurality of anchoring elements disposed on a plurality of struts, wherein said anchoring elements engage said blood vessel wall;
- wherein the shape memory material has a selected temperature at which the struts change shape;
- wherein the struts are divided into a first grouping and a second grouping;
- wherein said first grouping and second grouping of said plurality of struts attach to a body portion;
- wherein said body portion includes at least one aperture, said second grouping of said struts radiate from within said aperture, said body portion further including a hooking means, wherein said hooking means comprises of a conducting material;
- and
- wherein said second grouping of said plurality of struts retract within said aperture when the temperature of said shape-memory material is generally higher than body temperature.
Dependencies are inferred from the claim text.