Patent ID: 8025674

Claim:
A blood filtration device for deployment out of a lumen of a tubular delivery device into a blood stream, the blood filtration device comprising: an elongate support member with a distal end extendable out of the lumen of the tubular delivery device; a closed loop defining an opening, wherein the distal end of the support member is connected to the closed loop; and a filter mesh supported by the closed loop, the filter mesh configured to filter blood passing through the opening of the closed loop; wherein the distal end of the elongate support member is configured to urge the closed loop and the filter mesh out of the delivery catheter so as to deploy the closed loop and filter mesh into the blood stream; and wherein the closed loop is sized to expand until an outer periphery of the closed loop abuts an inner wall of a surrounding vessel and wherein substantially all blood in the surrounding vessel passes through the filter mesh.