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Heat exchanger for blood

  • US 4,177,816 A
  • Filed: 03/27/1978
  • Issued: 12/11/1979
  • Est. Priority Date: 03/27/1978
  • Status: Expired due to Term
First Claim
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1. A disposable heat exchanger for controlling the temperature of blood, comprising a plurality of generally parallel tubes having smooth inner walls, inlet and outlet means for supplying blood to and for collecting blood from the tubes, a jacket about the tubes having inlet and outlet means enabling the flow of a heat exchange medium through the jacket and in heat exchange proximity with the tubes, the tubes being characterized by including elongated inserts therein, each insert having periodic reverse bends providing the insert with a serpentine configuration, outer surfaces of the bends being in heat-exchange contact with inner walls of the tubes, the tubes with inserts being of sufficient number, length and flow area to enable gentle, laminar blood flow through the tubes at 37°

  • C. at a rate of up to about 5 liters per minute.

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