Method of determining system volume of a dialysis machine
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United States of America Patent
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Aug 28, 2001
Issued Date -
N/A
app pub date -
Jun 9, 2000
filing date -
Dec 9, 1996
priority date (Note) -
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Abstract
A method of calibrating a dialysis machine to determine the volume of a dialysate flow path of the machine including a dialysate preparation tank includes the steps of introducing a known quantity of electrically conductive chemicals into the dialysate preparation tank, filling the dialysate solution flow path with water, mixing the chemicals with water to form a solution, measuring the conductivity of the solution, calculating the system volume (V.sub.sys) according to the relation: V.sub.sys =M/(a.sub.1 r+b.sub.1) where M is the mass in grams of the chemicals, a.sub.1 and b.sub.1 are a coefficient of linearity and a constant of linearity, respectively, for the chemicals and r is the measured conductivity of the solution.
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