Patent ID: 7927346

Claim:
A partial aortic occlusion device, comprising: an expandable frame having an upstream portion and a downstream portion, the frame defining a circular mouth in the upstream portion configured to expand when positioned substantially perpendicular to the direction of blood flow in an aorta having an aortic lumen defined by an aortic wall, such that the upstream portion substantially conforms to the aortic wall to thereby at least partially occlude the aorta and increase cerebral profusion, wherein the downstream portion is substantially smaller in cross section than the expanded upstream portion, and the frame comprises a tapered transition between the upstream and downstream portions, such that the downstream portion is positioned in a central area of the aortic lumen without contacting the aortic wall when the circular mouth of the upstream portion is positioned in the aorta generally transverse to a line joining the upstream and downstream portions; a membrane mounted across at least a part of the circular mouth, the membrane having a continuous outer annular region adjacent the frame, said continuous outer region defining an opening, wherein the membrane is impermeable to blood and is biodegradable; and a permeable filtering material disposed on the downstream portion of the expandable frame, the filtering material configured to capture emboli and fragments of the biodegradable membrane entering the downstream portion through the circular mouth in the upstream portion.