Patent ID: 8777980

Claim:
Apparatus for filtering and entrapping debris from the vascular system of a patient, said apparatus comprising: a filter device being sized to allow blood flow therethrough and to restrict passage of debris therethrough, and said filter device having a first given perimeter, a proximal side and a distal side; and wherein said filtering device captures debris carried in a first direction of blood flow from said proximal side to said distal side thereof on said proximal side of said filter device; an entrapment mechanism having a proximal side and a distal side, said entrapment mechanism including a selective opening to allow passage of debris and blood therethrough, said selective opening being configured to allow passage of blood and debris carried therein therethrough in said first direction of blood flow from said proximal side to said distal side of said entrapment mechanism, said selective opening having a restriction mechanism to prevent debris passage from said distal side to said proximal side of said entrapment mechanism in a second direction opposite to said first direction, said selective opening forming a second given perimeter, and said first given perimeter and said second given perimeter being deployed within the vascular system so as to form a chamber between said distal side of said entrapment mechanism and said proximal side of said filtering device; wherein said entrapment mechanism allows blood and debris carried therein therethrough in said first direction of blood flow, said filtering device allows blood therethrough in said first direction of blood flow, and said restriction mechanism prevents debris back through said selective opening in said second direction of blood flow such that said chamber entraps the filtered debris received therein for debris removal from the vascular system of the patient, wherein said restriction mechanism is adapted to open to allow passage of debris and blood through said selective opening in said first direction of blood flow, and wherein said restriction mechanism is adapted to close to prevent passage of debris through said selective opening in said second direction of blood flow.