US 11,452,801 B2 · Measuring fluid flow associated with a dialysis machine

Abstract

A dialysis machine (e.g., a peritoneal dialysis (PD) machine) can include a control unit configured to monitor an amount of fluid withdrawn from a heater bag line during a PD treatment. A processor in the control unit is configured to operate a first pump to draw fluid into a first pump chamber and measure a first fluid volume in the first pump chamber. The processor is further configured to operate the first pump and a second pump to transfer fluid from the first pump chamber to a second pump chamber, measure a second fluid volume in the second pump chamber, and determine a measured fluid volume for a single pump cycle based on the first fluid volume and the second fluid volume. The first fluid volume is correlated to the second fluid volume and, therefore, the multiple independent measurements increase an accuracy of the fluid volume measurement.

Claims20

Dependent claims

A dialysis system, comprising:

a plurality of pumps;
a cassette including a plurality of pump chambers, wherein each pump chamber is fluidly connected to a corresponding pressure chamber;
and
a processor configured to:
operate a first pump to draw fluid into a first pump chamber fluidly connected to a first pressure chamber,
measure a first fluid volume in the first pump chamber;
operate the first pump and a second pump to transfer fluid from the first pump chamber to a second pump chamber fluidly connected to a second pressure chamber,
measure a second fluid volume in the second pump chamber, and
determining a measured fluid volume for a single pump cycle based on the first fluid volume and the second fluid volume.

6 more elements

A non-transitory computer readable storage medium storing instructions that, when executed by a processor, causes a dialysis machine to measure a fluid volume by performing steps comprising:

operating a first pump to draw fluid into a first pump chamber of a cassette, wherein the first pump chamber is fluidly connected to a first pressure chamber;
measuring a first fluid volume in the first pump chamber;
operating the first pump and a second pump to transfer fluid from the first pump chamber to a second pump chamber of the cassette, wherein the second pump chamber is fluidly connected to a second pressure chamber;
measuring a second fluid volume in the second pump chamber;
and
determining a measured fluid volume for a single pump cycle based on the first fluid volume and the second fluid volume.

3 more elements

Dependencies are inferred from the claim text.

Measuring fluid flow associated with a dialysis machine

Life of this patent

Measuring fluid flow associated with a dialysis machine

Life of this patent

Abstract

Claims20