Integrated membrane oxygenator, heat exchanger and reservoir

摘要

A membrane oxygenator includes an upper nested arrangement of a hard shell venous reservoir (24), a bowl-like defoamer (26) within the reservoir (24) and a heat exchanger coil (32) vertically supported within the defoamer (26), and includes a membrane oxygenator unit mounted on the bottom of the upper arrangement. The oxygenator unit (22) includes an inlet chamber (136) with a tangential inlet (40) providing swirling blood flow to dislodge air bubbles and centrifuge air to an upper center region of an inlet chamber (136) where gas is exhausted through a vent (138). A bottom blood outlet chamber (146) of the blood oxygenator unit (22) has a relatively thin vertical cross-sectional area such that priming flow velocity therein discharges all air from the outlet chamber (146).