An extracorporeal blood treatment apparatus is provided comprising a filtration unit (2) connected to a blood circuit (17) and to a dialysate circuit (32); a control unit (12) is configured for calculating a sodium concentration value for the blood; the estimation of the sodium concentration includes the sub-step of calculating the sodium concentration value as an algebraic sum of a main contribution term based on the isoconductive sodium concentrate and of an offset contribution term based on a concentration of at least a substance in the dialysis fluid chosen in the group including bicarbonate, potassium, acetate, lactate, citrate, magnesium, calcium, sulphate and phosphate.

An extracorporeal blood treatment apparatus is provided comprising a filtration unit (2) connected to a blood circuit (17) and to a dialysate circuit (32), a preparation device (9) for preparing and regulating the composition of the dialysis fluid; a control unit (12) is configured for setting a sodium concentration value for the dialysis fluid in the dialysis supply line (8) at a set point; the setting of the sodium concentration includes the sub-step of calculating the sodium concentration value as an algebraic sum of a main contribution term based on the blood plasma conductivity and of an adjustment contribution term based on a concentration of at least a substance in the dialysis fluid chosen in the group including bicarbonate, potassium, acetate, lactate, citrate, magnesium, calcium, sulphate, and phosphate.

Hemodialysis systems are described. A hemodialysis system may include a dialysate flow path through which dialysate is passed from a dialysate reservoir, which includes a valved vent to atmosphere, to an ultrafilter. The dialysate flow path includes a pneumatically actuated diaphragm-based dialysate pump for pumping fluid from the dialysate reservoir to the ultrafilter. The hemodialysis system may include a controller for controlling pneumatic actuation pressure delivered to the dialysate pump and at least one valve connecting the dialysate reservoir vent to the atmosphere. The hemodialysis system may be configured to actuate the dialysate pump and the at least one valve to introduce air into the dialysate flow path and expel liquid from the dialysate flow path to a drain.

The present disclosure relates to a control and/or closed-loop control device for executing a method for removing fluid from an extracorporeal blood circuit, in particular from a blood filter and/or from a venous air separation chamber, used for the blood treatment of a patient, wherein said controlling or closed-loop controlling is carried out after the completion of the blood treatment or the blood treatment session. It further relates to a medical treatment apparatus having a control and/or closed-loop control device with which the method according to the present disclosure is executable, a digital storage medium, a computer program product and a computer program.

An attaching member attachable to a blood purification apparatus including a peristaltic pump, the attaching member holding a pump tube to be squeezed in a predetermined direction by the peristaltic pump for liquid delivery. The attaching member includes a body attachable to a predetermined position of the blood purification apparatus, and a holding portion attached to the body and that holds the pump tube. The holding portion holds the pump tube such that the pump tube is inclined in a direction in which the pump tube is attached to the peristaltic pump.

An attaching member to be attached to a blood purification apparatus including peristaltic pumps, the attaching member holding pump tubes to be squeezed in a predetermined direction by the respective peristaltic pumps for liquid delivery. The attaching member includes a body attachable to a predetermined position of the blood purification apparatus, and a holding portion attached to the body and that holds the pump tubes. The body has openings through which flexible tubes that each allow liquid to flow through are allowed to pass, and the flexible tubes are securable by being passed through the openings.

An attaching member is provided that is capable of releasing a load occurring on a pump tube that is being attached to or detached from a peristaltic pump so that the work of attaching or detaching the pump tube to or from the peristaltic pump can be performed stably. An attaching member to be attached to a blood purification apparatus including peristaltic pumps holds pump tubes to be squeezed in a predetermined direction by the peristaltic pumps for liquid delivery. The attaching member includes a body attachable to a predetermined position of the blood purification apparatus, and holding portions attached to the body and that hold the pump tubes. The holding portions are displaceable relative to the body by rocking.

The present teachings provide an attaching member that holds a flexible tube through which liquid related to blood purification treatment is made to flow. The attaching member is attached to a blood purification apparatus and includes an anchor portion defined by a slit in such a manner as to be separated from an other portion and to be foldable, the anchor portion being capable of anchoring the flexible tube when folded to be raised from the other portion.

The present teachings provide an attaching member to be attached to a blood purification apparatus including peristaltic pumps, the attaching member holding pump tubes to be squeezed in a predetermined direction by the respective peristaltic pumps for liquid delivery. The attaching member includes a body attachable to a predetermined position of the blood purification apparatus, and holding portions attached to the body and that hold the pump tubes. The holding portions are attached to edge portions on two opposite sides of the body, and flexible tubes that each allow liquid to flow through are to be placed in a central portion of the body, the central portion being positioned between the holding portion on one of the edge portions and the holding portion on the other of the edge portions.

A dialysis system is provided that includes a dialysis machine and a potassium sensing device that is configured to measure the concentration of potassium in the patient's blood, in spent dialysate resulting from treating the patient, or in both. The potassium sensing device can be configured to generate a sensed value of the concentration of potassium. A control and computing unit, including a processor and a memory, is configured to receive the sensed value, compare the value with one or more values stored in the memory, and generate a control signal based on the comparison. A potassium infusion circuit uses the control signal to infuse supplemental potassium solution into the treatment dialysate, a replacement fluid, or both. The memory can include stored patient-historical and population data.