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Abstract

Disclosed is a method and apparatus for the quantification of solute removal during hemodialysis. The method relies upon discontinuing the flow of fresh dialysate to the dialyzer and recirculating the dialysate in a closed loop through the dialyzer. Recirculation is continued until a steady state concentration of solute (e.g. urea) in the dialysate is achieved. Analysis of the dialysate by suitable means at this time yields a value equal to the solute concentration in the blood without the need for blood sampling. Normal dialysis is resumed by discontinuing the recirculation and providing fresh dialysate to the dialyzer. Determination of solute concentrations at least at the beginning and end of the dialysis period allows the determination of solute loss and the quantification of dialysis therapy and its on-line prescription.

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First Claim