Patent ID: 8075586
Filing Date: 2011-12-13
Classification: A61B,A61M

Abstract:
1. A device for capturing particles flowing through a vessel, the device comprising: a catheter for insertion into the vessel, the catheter having a longitudinal lumen therein; a moveable member disposed substantially within the longitudinal lumen such that at least a portion of the moveable member extends beyond a distal end of the lumen; a plurality of flexible struts having a first end connected to the catheter and a second end connected to the moveable member, the struts having a contracted position wherein the struts are helically twisted around the portion of the moveable member that extends beyond the distal end of the lumen and a portion of the longitudinal lumen and an expanded position wherein the struts extend arcuately outward from the moveable member, wherein, in the contracted position, a longitudinal distance between the first and second ends of the struts is greater than the longitudinal distance in the expanded position; a porous membrane connected to the plurality of the flexible struts to define a trap; and an actuation mechanism coupling the moveable member to the catheter, wherein rotation of the moveable member induces longitudinal movement of the moveable member, and wherein the actuation mechanism is a screw extension system wherein a ratio between rotation and longitudinal motion of the moveable member is controlled by a pitch of the screw extension system.