Wound heat exchanger oxygenator
AssigneeMinntech Corporation
InventorsUlf-Eiel F. Bach, Paul D. Brinda, Louis C. Cosentino
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Abstract
A low prime, high heat exchange efficiency oxygenator is provided which includes an oxygenation portion and a heat exchanger portion. Disposed within the heat exchanger portion is a hollow tube heat exchanger wound bundle which includes a plurality of hollow tubes knitted into a mat, the mat wound under tension into a bundle which includes from 16 to 24 layers of the mat. The oxygenator provided permits prime volumes of 180 to 240 mLs.
Claims13
A hollow tube heat exchanger bundle used in open heart surgery for regulating the temperature of a patient's blood, said heat exchanger comprising a hollow heat tube mat including a plurality of substantially parallel hollow heat exchange tubes, each having a lumen, said heat exchange tubes weft knitted together by warp thread means in a spaced apart relationship, said warp thread means extending generally transversely to said heat exchange tubes and defining a spacing therebetween, said hollow heat exchange tube mat forming layers of stacked, substantially parallel plies, wherein the patient's blood uniformly flows around the exterior surface of each of said hollow heat exchange tubes and through said layers of stacked, substantially parallel plies as an exchange media passes through each of said lumens of said heat exchange tubes to heat and cool the blood during open heart surgery.
A hollow fiber membrane wound bundle used in open heart surgery for oxygenating a patient's blood, said hollow fiber membrane wound bundle comprising a hollow fiber mat including a plurality of substantially parallel hollow fiber membranes, each of said membranes having a lumen, said hollow fiber membranes weft knitted together by warp thread means in a spaced apart relationship, said warp thread means extending generally transversely to said hollow fiber membranes and defining a spacing therebetween, said hollow fiber mat forming layers of stacked, substantially parallel plies, wherein the patient's blood uniformly flows around the exterior surface of each of said hollow fiber membranes and through said layers of stacked, substantially parallel plies as an oxygenation media passes through each of said lumens of said hollow fiber membranes to oxygenate the blood during open heart surgery.
Dependencies are inferred from the claim text.