초록 ▼

A membrane oxygenator includes an upper nested arrangement of a hard shell venous reservoir, a bowl-like defoamer within the reservoir and a heat exchanger coil vertically supported within the defoamer, and includes a membrane oxygenator unit mounted on the bottom of the upper arrangement. The oxyge

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

대표청구항 ▼

A blood oxygenator comprising: a vertically disposed, elongated housing defining an internal chamber; gas-permeable and liquid-impermeable membrane means mounted in said housing internal chamber, said membrane means being arranged to define separate blood and gas flow paths through said housing; blo

A blood oxygenator comprising: a vertically disposed, elongated housing defining an internal chamber; gas-permeable and liquid-impermeable membrane means mounted in said housing internal chamber, said membrane means being arranged to define separate blood and gas flow paths through said housing; blood inlet and outlet means associated with said housing and formed to communicate with and direct blood through the blood flow path; gas inlet means and gas outlet means associated with the housing and formed to communicate with and direct gas through the gas flow path; means situated in an upper portion of said internal chamber which defines a substantially cylindrical compartment in said upper portion between said blood inlet means and said blood flow path, said compartment having a substantial horizontal component and being vertically oriented in said upper portion and communicating with a plurality of openings in said membrane to said blood flow path; said blood inlet means defining a blood passageway which communicates with said compartment and is arranged with respect to said compartment to direct incoming blood tangentially into said compartment; said compartment being dimensioned to promote a swirling non-vortex flow in said blood entering said compartment; and a vent associated with said compartment which is position to allow for the discharge of gas from said compartment.