초록 ▼

A hollow fiber type blood oxygenator having an integrated and improved heat exchanger having a generally conical housing and core member between which a helically wrapped conduit is situated. The conduit has a plurality of parallel flutes. A housing and core member are formed with helical recessed r

A hollow fiber type blood oxygenator having an integrated and improved heat exchanger having a generally conical housing and core member between which a helically wrapped conduit is situated. The conduit has a plurality of parallel flutes. A housing and core member are formed with helical recessed regions which conform to the conical helix defined by the tubing or conduit. The tubing is formed with flattened opposing surfaces which mate with the corresponding recesses in the housing and core member. The mating on the flats on the tube or conduit to the corresponding flats in the recessed regions of the housing and core member allows a substantially tighter and more uniform fit which minimizes the dynamic blood priming volume.

대표청구항 ▼

In a hollow fiber-type oxygenator having an enclosed heat exchanger section and gas exchanger section, said gas exchanger section comprising a first housing, a bundle of a multiplicity of hollow fibers for gas exchange, said hollow fibers being physically separated from one another and arranged side

In a hollow fiber-type oxygenator having an enclosed heat exchanger section and gas exchanger section, said gas exchanger section comprising a first housing, a bundle of a multiplicity of hollow fibers for gas exchange, said hollow fibers being physically separated from one another and arranged side by side within said first housing, first and second wall portions liquid-tightly supporting said hollow fibers at the opposite end portions of said hollow fibers so that the ends thereof are left open, said first and second walls defining with said fibers a blood chamber and a gas exchanger, gas exchanger inlet and outlet means communicating with said gas exchanger chamber, and a first blood circulation opening in said housing providing communication with said blood chamber, the improvement comprising; (a) a heat exchanger section including second housing means in fluid tight communication with the end portions of said gas exchanger section adjacent said second wall, said second housing means having an interior and exterior; (b) a heat transfer fluid conduit having a cross-sectional configuration of at least two planar substantially parallel opposing walls, said conduit including heat exchange fluid inlet and outlet means, said conduit being wound in a helix within said second housing means said helix and said heat exchange inlet and outlet means providing fluid communication through said conduit to the exterior of said second housing means; (c) heat exchanger section core means within said second housing means arranged such that said conduit is helically surrounding and in contact with said core means substantially along the entire length of said conduit; (d) said conduit further including a rib means along its length, said rib means comprising a plurality of parallel ribs about the external circumference of said conduit so as to increase the heat exchange surface area of said conduit; the cross-section of the conduit and rib means defining extended substantially planar surface regions which are generally parallel to a line drawn through centers of said conduit that form adjacent loops of said conduit (e) said second housing means including an inner wall surface configured to define a helical recess region conforming to the helical conduit throughout its length such that the outer planar surface of the conduit and inner wall recess regions cooperate to define a low volume channel through which blood may pass from a blood inlet means in fluid tight communication with the interior of said second housing means to said gas exchanger section; and (f) said core means including an external wall surface configured to define a helical recess region conforming to the helical conduit such that the inner planar surface of the conduit and external wall recess region provide a low volume channel through which blood may pass from said blood inlet means to said gas exchanger section.