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Automatic apparatus for obtaining equilibration samples of dialysate

  • US 5,849,179 A
  • Filed: 05/20/1996
  • Issued: 12/15/1998
  • Est. Priority Date: 10/13/1992
  • Status: Expired due to Term
First Claim
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1. An apparatus for conducting equilibration of dialysate with a patient'"'"'s blood for a patient undergoing hemodialysis, comprisingconnecting means for connecting to a dialysis machine for receiving a flow of dialysate therefrom and for connecting said flow to a dialyzer cartridge and directing a flow of dialysate from said dialysis machine through said dialyzer cartridge and back to said dialysis machine;

  • valve means actuatable between one position for stopping dialysate flow from said dialysis machine to said dialyzer cartridge and for directing said dialysate flow back to said dialysis machine, and for retaining a predetermined volume of dialysate in said dialyzer cartridge, and another position for allowing ultrafiltration to take place from the blood of the patient flowing through said dialyzer cartridge, with said returned pre-determined volume of dialysate remaining in said dialyzer cartridge ;

    means for measuring the metabolite concentration in at least two samples of said retained pre-determined volume of dialysate and for continuing to sample said retained predetermined volume of dialysate until the difference in concentrations between two successive samples is less than a specified amount.

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