초록 ▼

A heat exchanger and blood oxgenator apparatus includes a housing having a blood inlet portion, a blood outlet portion, and a housing wall defining an enclosed chamber disposed along a chamber axis between the blood input portion and the blood output portion through which to pass a quantity of blood

A heat exchanger and blood oxgenator apparatus includes a housing having a blood inlet portion, a blood outlet portion, and a housing wall defining an enclosed chamber disposed along a chamber axis between the blood input portion and the blood output portion through which to pass a quantity of blood to be temperature controlled. A heat exchanger tube having an exterior surface and a hollow interior through which to pass a heat exchange medium for purposes of exchanging heat with a quantity of blood brought into contact with the exterior surface, is disposed in a generally helical coil that is mounted within the chamber to encircle the chamber axis. A scalloped inner surface is included on the housing wall to face generally inward toward the heat exchanger tube. Spacing members disposed between the exterior surface of the heat exchanger tube and the scalloped inner surface of the housing wall retain the exterior surface spaced apart from the scalloped inner surface to define a flow passage through which to pass a quantity of blood so that the blood contacts a substantial portion of the exterior surface.

대표청구항 ▼

An apparatus for changing the temperature of blood comprising: a housing having at least a first inner wall defining an enclosed chamber through which blood may be directed from a blood inlet portion to a blood outlet portion; a heat exchanger tube, formed from a tubular body having external and int

An apparatus for changing the temperature of blood comprising: a housing having at least a first inner wall defining an enclosed chamber through which blood may be directed from a blood inlet portion to a blood outlet portion; a heat exchanger tube, formed from a tubular body having external and internal surfaces, which is wound in a helical arrangement to provide a plurality of adjacently positioned windings having a top and bottom end, said helically wound tube being dimensioned to be received in the chamber to position at least an outwardly facing portion of said external surface of each of said windings to face said at least a first inner wall, said heat exchanger tube having a plurality of individual circumferentially extending external ribs thereon and reduced cross-sectional area regions between said ribs; an inner member formed to fit within said coil and having a surface confronting a portion of said external surface of said tube opposite said at least a first housing inner wall; said at least a first inner wall having a surface facing said external surface of said windings and formed with a complimentary shape of alternating depressions and protrusions for receiving at least a portion of said heat exchanger tube; said at least a first housing inner wall and said inner member being placed in substantial engagement with said ribs of said heat exchanger tube while remaining spatially separated at said top and bottom ends of said heat exchanger tube to define an open pathway therebetween; means for directing said blood between said housing inner wall and said inner member surface over said top end of said heat exchanger tube; and means for directing a heat exchange fluid through said heat exchange tube.