초록 ▼

A blood oxygenator comprising a housing generally in the form of a box and bundles of hollow fibers of semipermeable membrane set therein for effecting gas exchange therethrough. In this blood oxygenator, each end of each bundle of hollow fibers of semipermeable membrane is secured together by potti

A blood oxygenator comprising a housing generally in the form of a box and bundles of hollow fibers of semipermeable membrane set therein for effecting gas exchange therethrough. In this blood oxygenator, each end of each bundle of hollow fibers of semipermeable membrane is secured together by potting material in such a way as to allow their open ends to communicate separately with a gas inlet and a gas outlet; the space around the bundles of hollow fibers of semipermeable membrane communicates with a blood inlet and a blood outlet; the blood-gas contact chamber within the housing is divided into a plurality of compartments with the interposition of blood flow channels narrowed by baffles; and the bundle of hollow fibers of semipermeable membrane is disposed in the contact chamber so as to be substantially parallel to the baffles. This blood oxygenator has high oxygen and carbon dioxide exchange rates per unit area of membrane, causes little channeling of the blood and gas, exhibits only a small pressure loss in the flow of blood, and is easy to manufacture.

대표청구항 ▼

A blood oxygenator comprising: a housing having a blood inlet, a blood outlet, a gas inlet, a gas outlet, and a blood-gas contact chamber therein, said chamber having an entrance in communication with said blood inlet and an exit in communication with said blood outlet, said chamber having an overal

A blood oxygenator comprising: a housing having a blood inlet, a blood outlet, a gas inlet, a gas outlet, and a blood-gas contact chamber therein, said chamber having an entrance in communication with said blood inlet and an exit in communication with said blood outlet, said chamber having an overall length (b) as measured in a direct line between said entrance and said exit, an overall width (w) measured in a direction perpendicular to said direct line, and an overall thickness (a) measured in a direction perpendicular to both said overall length and said overall width; bundles of semi-permeable hollow fiber membrane disposed in said chamber and extending across said width (w) thereof, said membrane being made of a material suitable for the oxygenation of blood; and a potting material securing together opposite ends of said bundles in such a way as to allow their open ends to communicate respectively with said gas inlet and said gas outlet, the space around said bundles communicating with said blood inlet and said blood outlet, wherein a blood flow path is established from said blood inlet, through said chamber and to said blood outlet, said oxygenator further comprising means for minimizing hemolysis of blood flowing along said blood flow path, said means for minimizing hemolysis comprising blood flow restriction means in the form of at least one baffle extending into said blood flow path in the direction of said thickness of said chamber and forming a plurality of compartments in said chamber, said at least one baffle extending substantially parallel to said bundles, the location of said at least one baffle with respect to said length of said chamber being such that the maximum thickness (a) of each said compartment formed by said at least one baffle is no greater than the length (b1) of each said compartment as measured in the direction of said length of said chamber.