Patent ID: 7367959
Filing Date: 2008-05-06
Classification: A61M,F04B

Abstract:
1. A device for cardiocirculatory assistance comprising: a haematic pump with a pump body having an inner space defined by an external rigid structure and by a pair of internal flexible membranes arranged so as to oppose each other, each of said flexible membranes having a substantially circular shape; a pair of rigid lids arranged so as to define recesses between said rigid lids and said flexible membranes, respectively, wherein said recesses are to be alternately supplied with positive pressure and negative pressure gas so as to alternately draw said flexible membranes reciprocally together and apart in order to respectively decrease and increase a volume of said inner space of said pump body; a blood input tube connected to said pump body so as to be in fluid communication with said inner space of said pump body; a blood output tube connected to said pump body so as to be in fluid communication with said inner space; and a pair of spontaneously opening one-way valves for controlling a flow of blood through said blood input tube and said blood output tube, respectively, so as to allow, in combination with the increase and decrease of the volume of said inner space, a continuous filling and evacuating cycle of said inner space in which blood in said inner space flows along a substantially circular path defined by the substantially circular shape of said flexible membranes.