Lasso filter tipped microcatheter for simultaneous rotating separator, irrigator for thrombectomy and method for use

An endovascular device for capturing emboli comprising:

• (a) a elongated member having a proximal portion, a distal portion, a lumen, a first opening at the proximal portion and a second opening at the distal portion;
• (b) a flared, semi-permeable filter adapted to allow passage of blood cells and serum and to capture emboli, the filter having a proximal rim at a proximal segment, a distal rim at a distal segment, and an attachment region at one of the proximal rim or distal rim, the filter protruded from the lumen of the elongated member, the filter movable between expanded and collapsed configurations, wherein when in the expanded configuration, the filter contacts an inner wall of a vessel such that blood flowing through the vessel travels through said filter;
• (c) a rewinding mechanism positioned proximal of the attachment region;
• and
• (d) a cinching member extending from the rewinding mechanism to the distal segment of the filter, the cinching member extending within the elongated member from said rewinding mechanism and along a length of the filter, and a portion of the cinching member extending circumferentially around a portion of the filter, the cinching member slidably disposed around the portion of the filter forming a lasso-like component configured to close the filter around the captured emboli for removal of the filter with the captured emboli, wherein the filter is closed external of the elongated member and is withdrawn into the lumen of the elongated member;
• (e) wherein a diameter of the filter is greater at the distal segment than the proximal segment in the expanded configuration of the filter;
• (f) wherein when the filter is released to expand circumferentially, the cinching member is dispensed from the rewinding mechanism in order to increase the length of the portion of the cinching member extending circumferentially around the distal rim;
• (g) wherein when the distal segment is collapsed by rewinding the portion of the cinching member, the portion of the cinching member extending circumferentially around the distal rim of the filter is decreased.