Inverted embolic protection filter
AssigneeBoston Scientific Scimed, Inc.
InventorThomas E. Broome
Life of this patent
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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.
Claims18
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.
Dependencies are inferred from the claim text.