Patent ID: 6258027
Filing Date: 2001-07-10
Classification: A61M

Abstract:
A method for calculating a parameter of the mass exchange of a solute in a fluid comprising:passing said solute in a predetermined volume of said fluid on one side of a semi-permeable membrane in a mass exchange device,passing an exchange fluid on the other side of said semi-permeable membrane,obtaining a solute concentration curve by repeatedly measuring the concentration of said solute in said exchange fluid,fitting an approximation curve having a logarithm comprising a substantially straight line with at least a portion of said concentration curve,determining a parameter of said approximation curve, andcalculating the mass of said solute in said predetermined volume of said fluid by the formula m=(Q.sub.d.multidot.c.sub.d)/P whereinm comprises said mass of said solute,Q.sub.d comprises the flow rate of said exchange fluid,c.sub.d comprises the concentration of said solute in said exchange fluid, andP comprises said parameter.