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Temperature-controlled electric device for heating transfusion fluids

  • US 4,772,778 A
  • Filed: 03/24/1987
  • Issued: 09/20/1988
  • Est. Priority Date: 06/16/1986
  • Status: Expired due to Term
First Claim
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1. A transfusion fluid heating device which includes (a) a case with a front face and having therein an electrically energized heater and an electric circuit for controlling the energizing of said heater, (b) a heating plate disposed in said front face of said case and having, on its surface, a groove following a winding course at its middle portion and adapted to receive therein a transfusion fluid conduit, and (c) a lid for closing said case on the side of said front face thereof, and is characterized in that:

  • (A) said heater is bonded to the back side of said heating plate; and

    (B) said electric circuit includes (i) a means for determining the temperature of transfusion fluid heated by said heating plate, (ii) a means for determining the temperature of said heating plate, (iii) a means for determining the temperature of said heater, (iv) a means for controlling an electric input to said heater, in response to the fluid temperature determined by said fluid temperature determining means (i), so that the fluid has a predetermined temperature, and (v) a means for stopping an electrical input to said heater when one of the temperature of said heating plate determined by said heating plate temperature determining means (ii) and of said heater determined by said heater temperature determining means (iii) has increased beyond a certain predetermined value.

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