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Dialysis fluid heating algorithms

  • US 8,078,333 B2
  • Filed: 07/05/2007
  • Issued: 12/13/2011
  • Est. Priority Date: 07/05/2007
  • Status: Expired due to Fees
First Claim
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1. A dialysis fluid heating system comprising:

  • a dialysis fluid heater;

    a dialysis fluid carrying element in operable communication with the dialysis fluid heater to heat a dialysis fluid; and

    a logic implementer configured to control the heater using(i) a first heater input determined using a first feedforward determination at a first time from a first dialysis fluid temperature delta and a first dialysis fluid flowrate,(ii) a feedback adjustment of a second dialysis fluid temperature delta using a measured dialysis fluid outlet temperature and at least two of a proportional gain, integral gain and derivative gain; and

    (iii) a second heater input determined using a second feedforward determination at a second time from the second dialysis fluid temperature delta and a second dialysis fluid flowrate.

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