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Intravenous fluid temperature regulation method and apparatus

  • US 5,108,372 A
  • Filed: 12/12/1990
  • Issued: 04/28/1992
  • Est. Priority Date: 12/12/1990
  • Status: Expired due to Fees
First Claim
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1. A device for controlling the temperature of intravenous fluids as they enter the human body comprising:

  • (a) an intravenous infusion assembly;

    (b) a heat exchange assembly removably mounted to said intravenous infusion assembly, wherein said heat exchange assembly comprises;

    (i) one or more heat exchangers;

    (ii) one or more fluid temperature sensors;

    (iii) one or more fluid flow sensors; and

    (iv) a control signal wire bundle;

    (c) a controller, said controller being functionally attached to said intravenous infusion assembly and to said heat exchange assembly;

    wherein said controller includes the use of a flow feedback algorithm comprising;

    ##EQU3## where Tset is the set point temperature, T0 is the initial fluid temperature in °

    C., Cs is the heat capacity of the IV solution, F is the IV fluid flow in (ml/sec), ε

    is the working efficiency of the heat exchanger, T2 is the time derivative of the final fluid temperature T2, and α

    is an empirical damping coefficient; and

    (d) an energy source functionally associated with said controller and said heat exchange assembly.

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