Patent ID: 8303529

Claim:
A cardiotomy and venous blood reservoir comprising: a housing assembly forming a main chamber; a venous inlet port; a venous sub-assembly forming a venous chamber fluidly between the venous inlet port and the main chamber, the venous sub-assembly including: a downtube defining an upstream region, a downstream region, and a lumen extending therethrough, wherein: the upstream region extends from the venous inlet port, the downstream region extends from the upstream region and terminates at a downstream end located within the main chamber, a diameter of the lumen increases along at least a portion of the downstream region to the downstream end, a bowl disposed within the venous chamber and forming a floor surface facing the downstream end for receiving venous blood flow from the lumen; a cardiotomy inlet port; and a cardiotomy sub-assembly forming a cardiotomy chamber fluidly between the cardiotomy inlet port and the main chamber, the cardiotomy sub-assembly including: a dish defining a flow surface open to the cardiotomy inlet port and terminating at a central aperture, an inner post extending downwardly relative to the dish, the inner post co-axially disposed over the downtube and forming a guide surface defined by a leading segment received within the central aperture and having a diameter less than a diameter of the central aperture, and a trailing segment extending downwardly from the leading segment, the trailing segment forming an undulating curvature and defining a diameter greater than the diameter of the central aperture.