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US 2022/0031920 A1Published application
Apparatus for extracorporeal blood treatment
AssigneeGambro Lundia AB
InventorAnders Nilsson
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Abstract
An extracorporeal blood treatment apparatus is provided comprising a filtration unit connected to a blood circuit and to a dialysate circuit, a preparation device for preparing and regulating the composition of the dialysis fluid; a control unit is configured for receiving a desired sodium mass transport at the end of the treatment session and for setting the sodium concentration value for the dialysis fluid in the dialysis supply line at a set point to achieve the desired sodium mass transport at the end of the treatment session.
Claims22
An apparatus for extracorporeal blood treatment comprising:
- a filtration unit including a primary chamber and a secondary chamber separated by a semi-permeable membrane;
- a blood withdrawal line connected to an inlet of the primary chamber;
- a blood return line connected to an outlet of the primary chamber, said blood withdrawal line and blood return line being configured for connection to a patient cardiovascular system;
- a dialysis supply line;
- a dialysis effluent line connected to an outlet of the secondary chamber;
- a preparation device for preparing a dialysis fluid connected to said supply line and including a regulator for regulating the composition of the dialysis fluid;
- and
- a control unit connected to the regulator and programmed to receive a desired mass transport of a substance at the end of a treatment session and a value representative of a first parameter, wherein the desired mass transport is a set amount of the substance that is transported over the semi-permeable membrane of the filtration unit during the treatment session, the first parameter being chosen from the group consisting of a plasma conductivity, a plasma conductivity-related parameter, a concentration of the substance in the blood, a concentration-related parameter of the substance in the blood, a conductivity of the dialysis fluid, a conductivity-related parameter of the dialysis fluid, a concentration of the substance in the dialysis fluid, and a concentration-related parameter of the substance in the dialysis fluid,
- wherein said control unit is programmed for setting a second parameter value for the dialysis fluid in the dialysis supply line at a set point, said second parameter of the dialysis fluid being chosen from a group consisting of the conductivity of the dialysis fluid, the conductivity-related parameter of the dialysis fluid, the concentration of the substance in the dialysis fluid, and the concentration-related parameter of the substance in the dialysis fluid, and
- wherein the setting of the second parameter value in the dialysis fluid includes a sub-step of calculating the second parameter value as a function of the desired mass transport, and wherein the second parameter value in the dialysis fluid is set such that the set amount of the substance is transported over the semi-permeable membrane at the end of the treatment session.
7 more elements
An apparatus for extracorporeal blood treatment comprising:
- a filtration unit including a primary chamber and a secondary chamber separated by a semi-permeable membrane;
- a blood withdrawal line connected to an inlet of the primary chamber;
- a blood return line connected to an outlet of the primary chamber, said blood withdrawal line and blood return line being configured for connection to a patient cardiovascular system;
- a dialysis supply line;
- a dialysis effluent line connected to an outlet of the secondary chamber;
- a preparation device for preparing a dialysis fluid connected to said supply line and including a regulator for regulating the composition of the dialysis fluid;
- and
- a control unit connected to the regulator and programmed to receive a desired sodium mass transport at the end of a treatment session and a total treatment time, wherein the desired sodium mass transport is a set mass of sodium that is transported over the semi-permeable membrane of the filtration unit during the treatment session,
- wherein said control unit is programmed for setting a parameter value for the dialysis fluid in the dialysis supply line at a set point, said parameter of the dialysis fluid being either a conductivity of the dialysis fluid, or a concentration of a substance in the dialysis fluid, and
- wherein the setting of the parameter value in the dialysis fluid includes a sub-step of calculating the parameter value as a function of the desired sodium mass transport and as a function of the total treatment time, and wherein the second parameter value in the dialysis fluid is set such that the set mass of sodium is transported over the semi-permeable membrane at the end of the treatment session.
7 more elements
Dependencies are inferred from the claim text.