Inverted embolic protection filter
First Claim
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1. An embolic protection filter comprising:
- a filter frame including a proximal tubular member and a distal tubular member disposed about a guidewire;
wherein the distal tubular member is slidable about the guidewire;
a support hoop coupled to a plurality of expandable struts, said plurality of expandable struts biased to expand in an outward direction within a body lumen; and
an inverted membrane attached at a first end to the support hoop and at a second end to the proximal tubular member, said inverted membrane having a proximally tapered proximal section and an enlarged diameter distal section, the junction between the enlarged diameter distal section and the proximally tapered proximal section forming a folded or creased portion wherein a length of the inverted membrane folds back and extends outwardly from the enlarged diameter distal section and proximally terminating at the support hoop;
wherein the proximally tapered proximal section of the inverted membrane is attached to the proximal tubular member and extends through the support hoop to the folded or creased portion.
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Abstract
An embolic protection filter having an inverted membrane with improved blood perfusion characteristics is disclosed. An embolic protection filter in accordance with the present invention comprises a filter frame disposable about a guidewire, a support hoop coupled to a plurality of expandable struts, and an inverted membrane for filtering embolic debris. The inverted membrane has a tapered proximal section and an enlarged diameter distal section. Features of the present invention permit the perfusion of blood through the filter irrespective of embolic debris entrained therein.
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Citations
18 Claims
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1. An embolic protection filter comprising:
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a filter frame including a proximal tubular member and a distal tubular member disposed about a guidewire; wherein the distal tubular member is slidable about the guidewire; a support hoop coupled to a plurality of expandable struts, said plurality of expandable struts biased to expand in an outward direction within a body lumen; and an inverted membrane attached at a first end to the support hoop and at a second end to the proximal tubular member, said inverted membrane having a proximally tapered proximal section and an enlarged diameter distal section, the junction between the enlarged diameter distal section and the proximally tapered proximal section forming a folded or creased portion wherein a length of the inverted membrane folds back and extends outwardly from the enlarged diameter distal section and proximally terminating at the support hoop; wherein the proximally tapered proximal section of the inverted membrane is attached to the proximal tubular member and extends through the support hoop to the folded or creased portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification