US 2019/0167879 A1 · Method Of Monitoring The Bicarbonate Content And The Sodium Content Of A Dialysis Solution

Abstract

The present invention relates to a method of monitoring the bicarbonate content and the sodium content of a dialysis solution, wherein the dialysis solution is prepared while adding a bicarbonate component and an acidic sodium component, and wherein the method comprises the following steps: a. adding the acidic sodium component and measuring the conductivity (LFist,Na); b. adding the bicarbonate component and measuring the increase in conductivity (ΔLFist,BiC) caused by adding the bicarbonate component; c. determining the increase in conductivity (ΔLFexp,Bic) expected due to the addition of the bicarbonate component; d. checking whether the measured increase in conductivity (ΔLFist,Bic) lies in an expected range of the increase in conductivity (ΔLFexp,Bic); e. determining the total conductivity (LFexp,D) expected after the addition of the bicarbonate component and of the acidic sodium component; f. measuring the total conductivity (LFist,D) after the addition of the bicarbonate component and of the acidic sodium component; and g. checking whether the measured total conductivity (LFist,D) lies in an expected range of the total conductivity (LFexp,D), wherein the measurement of the conductivity in accordance with step a.; the measurement of the increase in conductivity in accordance with step b.; and the measurement of the total conductivity in accordance with step f. are carried out by one and the same conductivity measurement cell.

Claims18

Dependent claims

A method of monitoring the bicarbonate content and the sodium content of a dialysis solution, wherein the dialysis solution is prepared while adding a bicarbonate component and an acidic sodium component, and wherein the method comprises the following steps:

a. adding the acidic sodium component and measuring the conductivity (LFist,Na);
b. adding the bicarbonate component and measuring the increase in conductivity (ΔLFist,Bic) caused by adding the bicarbonate component;
c. determining the increase in conductivity (ΔLFexp,Bic) expected due to the addition of the bicarbonate component;
d. checking whether the measured increase in conductivity (ΔLFist,Bic) lies in an expected range of the increase in conductivity (ΔLFexp,Bic);
e. determining the total conductivity (LFexp,D) expected after the addition of the bicarbonate component and of the acidic sodium component;
f. measuring the total conductivity (LFist,D) after the addition of the bicarbonate component and of the acidic sodium component;
and
g. checking whether the measured total conductivity (LFist,D) lies in an expected range of the total conductivity (LFexp,D),
wherein the measurement of the conductivity in accordance with step a.;
the measurement of the increase in conductivity in accordance with step b.;
and the measurement of the total conductivity in accordance with step f. are carried out by one and the same conductivity measurement cell.

8 more elements

A preparation device for preparing a dialysis solution from at least two components, wherein the preparation device has a container having a bicarbonate component (“bicarbonate container”) and a container having an acidic sodium component (“sodium container”);

wherein the preparation device has a conductivity measurement cell for measuring the conductivity (LFist,Na) of the fluid after the addition of the acidic sodium component;
a conductivity measurement cell for the measurement of the increase in conductivity (ΔLFist,Bic) caused by the addition of the component containing bicarbonate;
and a conductivity measurement cell for the measurement of the total conductivity (LFist,D) of the dialysis solution containing the acidic sodium component and the bicarbonate component;
and wherein the preparation device has a checking unit which is configured such that it checks whether the increase in conductivity (ΔLFist,Bic) caused by the addition of the bicarbonate component is in an expected range of the increase in conductivity (ΔLFexp,Bic) and whether the measured total conductivity (LFist,D) is in an expected range of the total conductivity (LFexp,D), with the named conductivity measurement cells being one and the same conductivity measurement cell.

1 more element

Dependencies are inferred from the claim text.

Method Of Monitoring The Bicarbonate Content And The Sodium Content Of A Dialysis Solution

Life of this patent

Method Of Monitoring The Bicarbonate Content And The Sodium Content Of A Dialysis Solution

Life of this patent

Abstract

Claims18