Early detection of low bicarbonate level
First Claim
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1. A method performed by data processing apparatus of a dialysis machine, the method comprising:
- receiving a first signal from a conductivity detector connected to a line through which a solution of bicarbonate and fluid flows to a dialyzer of the dialysis machine, wherein the fluid flows from a fluid source, through a fluid line segment connected to the fluid source and the line, to the line;
determining a first conductivity of the solution based on the first signal;
receiving a second signal from the conductivity detector at a time after receiving the first signal;
determining a second conductivity of the solution based on the second signal; and
determining that solid bicarbonate in a container through which the solution flows is approaching a level insufficient to maintain the solution at a conductivity suitable for flowing though the dialyzer, based on a determination that the second conductivity is less than the first conductivity by at least a threshold amount.
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Abstract
This disclosure relates to early detection of low bicarbonate level. In certain aspects, a method includes receiving a first signal from a conductivity detector connected to a line through which a solution of salt concentrate and fluid flows and determining a first conductivity of the solution based on the first signal. The method also includes receiving a second signal from the conductivity detector at a time after receiving the first signal, determining a second conductivity of the solution based on the second signal, and determining whether the second conductivity is less than the first conductivity by at least a threshold amount.
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Citations
29 Claims
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1. A method performed by data processing apparatus of a dialysis machine, the method comprising:
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receiving a first signal from a conductivity detector connected to a line through which a solution of bicarbonate and fluid flows to a dialyzer of the dialysis machine, wherein the fluid flows from a fluid source, through a fluid line segment connected to the fluid source and the line, to the line; determining a first conductivity of the solution based on the first signal; receiving a second signal from the conductivity detector at a time after receiving the first signal; determining a second conductivity of the solution based on the second signal; and determining that solid bicarbonate in a container through which the solution flows is approaching a level insufficient to maintain the solution at a conductivity suitable for flowing though the dialyzer, based on a determination that the second conductivity is less than the first conductivity by at least a threshold amount. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 21, 22, 23, 24, 25)
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11. A dialysis system comprising:
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a fluid source; a fluid line segment connected to the fluid source; a container containing solid bicarbonate, the container connected to the fluid line segment, wherein the fluid flows from the fluid source, through the fluid line segment, to the container; a line connected to the container; a conductivity detector connected to the line; and a data processing apparatus connected to the conductivity detector and configured for; receiving a first signal from a conductivity detector connected to the line through which a solution of bicarbonate and fluid flows to a dialyzer of the dialysis machine; determining a first conductivity of the solution based on the first signal; receiving a second signal from the conductivity detector at a time after receiving the first signal; determining a second conductivity of the solution based on the second signal; determining that the solid bicarbonate in the container through which the solutions flows is approaching a level insufficient to maintain the solution at a conductivity suitable for flowing through the dialyzer, based on a determination that the second conductivity is less than the first conductivity by at least a threshold amount. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 26, 27, 28, 29)
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Specification