EMBOLIC FILTER LOOP FABRICATED FROM COMPOSITE MATERIAL
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Abstract
Embolic protection filters formed from composite materials exhibiting certain radiopaque and elasticity characteristics are disclosed. An embolic protection filter in accordance with an exemplary embodiment of the present invention may include a support structure formed of a composite member having a first layer of relatively elastic material such as superelastic nickel-titanium alloy, and a second layer formed from a relatively dense, radiopaque material. The support structure may comprise a composite wire loop that is connected to a filter membrane that collects embolic debris contained in the blood. The composite wire loop may be formed at least in part of a shape-memory material configured to self-expand to a circular shape when deployed in the body. Methods of forming the support structure are also disclosed.
99 Citations
20 Claims
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1. (canceled)
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2. An embolic filter assembly comprising:
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a guidewire; a composite metallic loop disposed within a plane substantially normal to the guidewire; wherein the composite metallic loop comprises a first material having a first set of mechanical properties and a second material having a second set of mechanical properties different from the first set of mechanical properties, further wherein the first material and the second material differ in radiographic density; and filter membrane forming a generally concave sac having a first end and a second end, said sac being concave toward the first end, wherein the second end of the filter membrane and the composite metallic loop are attached substantially along their mutual perimeters. - View Dependent Claims (3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An embolic filter assembly comprising:
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a guidewire; a composite metallic loop disposed within a plane substantially normal to the guidewire, wherein the composite metallic loop comprises a first material formed of a superelastic alloy having a shape-memory characteristic at body temperature and a second material having a second set of mechanical properties different from the first set of mechanical properties, further wherein the first material and the second material differ in radiographic density; and filter membrane forming a generally concave sac having a first end and a second end, said sac being concave toward the first end, wherein the second end of the filter membrane and the composite metallic loop are attached substantially along their mutual perimeters. - View Dependent Claims (20)
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Specification