Patent ID: 6336934
Filing Date: 2002-01-08
Classification: A61B,A61F

Abstract:
A vascular filtration device for removing embolic material in body fluid, said device comprising:a delivery system having a longitudinal axis, distal and proximal portions, said distal portion of the delivery system being removably advanceable into the vasculature of a patient; a collapsible filter body having a longitudinal axis, a proximity tapering proximal end and a distal end, and further having a collapsed configuration and an expanded deployed configuration, the collapsed configuration permitting delivery and withdrawal of the filter body from the vasculature of a patient; the filter body defining an interior space when in said expanded configuration; at least one fluid inlet on the proximal end of the filter body, the inlet being open to admit blood and embolic material into said interior space when the filter body is in the expanded configuration, and substantially closed to fluid flow when the filter body is in the collapsed configuration; a plurality of outlet openings at the distal end of the filter body, the outlet openings being open to fluid flow from said interior space when the filter body is in the expanded configuration; the outlet openings being sized to allow through passage of blood but retaining undesired embolic material within the filter body; wherein the filter body is moved between the collapsed and expanded configurations through relative motion of portions of the filter delivery system with respect to the filter body; said proximal end of the filter body being collapsible on transition to the collapsed configuration thereby firstly substantially closing said at least one fluid inlet to ensure retention of any collected embolic material in the interior space and then collapsing the remainder of the filter body; and the delivery system includes a guidewire, and the filter body is rotatable relative to the delivery system.