Embolic protection device
First Claim
1. An embolic protection filter comprising:
- a filter body having an inlet end, an outlet end, and an intermediate section extending between the inlet end and the outlet end, the inlet end of the filter body having one or more inlet openings sized to allow blood and embolic material enter the filter body, the outlet end of the filter body having a plurality of outlet openings sized to allow through passage of blood but to retain undesired embolic material within the filter body, and the filter body having an expanded position for apposition with a vessel wall and a collapsed position for movement through the vascular system;
the intermediate section comprising a hinging region formed circumferentially around the filter body, wherein the hinging region defines a circumferential groove in the intermediate section of the filter body.
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Abstract
An embolic protection device has a collapsible filter element (105) mounted on a carrier such as a guidewire (101). The filter element (105) collapses into the outer end of a catheter (118) for deployment and retrieval through a vascular system of a patient. The filter element (105) has a collapsible filter body with a proximal inlet end and a distal outlet end. The proximal inlet end has inlet openings sized to allow blood and embolic material enter the filter body. The outlet end has outlet openings which allow through passage of blood but retain embolic material within the filter body. After use, the catheter (118) is movable along the guidewire (101) to engage the proximal end of the filter element and close the inlet openings before sliding over the filter element from the proximal end to the distal end to progressively collapse the filter body on the guidewire (101) for retrieval. The filter element (105) may conveniently be mounted on a tubular sleeve (104) which is slidable and rotatable on the guidewire (101) between spaced-apart stops (106, 120) on the guidewire (101) which allows some manipulation of the guidewire independently of the filter when the filter is in use.
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Citations
18 Claims
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1. An embolic protection filter comprising:
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a filter body having an inlet end, an outlet end, and an intermediate section extending between the inlet end and the outlet end, the inlet end of the filter body having one or more inlet openings sized to allow blood and embolic material enter the filter body, the outlet end of the filter body having a plurality of outlet openings sized to allow through passage of blood but to retain undesired embolic material within the filter body, and the filter body having an expanded position for apposition with a vessel wall and a collapsed position for movement through the vascular system; the intermediate section comprising a hinging region formed circumferentially around the filter body, wherein the hinging region defines a circumferential groove in the intermediate section of the filter body. - 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