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.

A system and method for balancing flows of renal replacement fluid is disclosed. The method uses pressure controls and pressure sensing devices to more precisely meter and balance the flow of fresh dialysate and spent dialysate. The balancing system may use one or two balancing devices, such as a balance tube, a tortuous path, or a balance chamber.

A dialysis method to enable a patient to undergo both peritoneal dialysis and extracorporeal blood treatments is disclosed. The method includes determining, via a base unit controller, whether a peritoneal dialysis treatment or an extracorporeal blood treatment is to be performed. If the peritoneal dialysis treatment is to be performed, the method includes operating first software instructions that cause a base unit to use a first fluid stored in a fluid container. If the extracorporeal blood treatment is to be performed, the method includes operating second software instructions that cause the base unit to use a second, different fluid from an online source and selectively move the second, different fluid to a blood treatment unit for use in the extracorporeal blood treatment. The blood treatment unit is operable with the base unit to perform the extracorporeal blood treatment on a patient.

A system and method for balancing flows of renal replacement fluid is disclosed. The method uses pressure controls and pressure sensing devices to more precisely meter and balance the flow of fresh dialysate and spent dialysate. The balancing system may use one or two balancing devices, such as a balance tube, a tortuous path, or a balance chamber.

The present invention concerns an extracorporeal circuit for removing CO.sub.2 from blood comprising a blood withdrawal line for withdrawing blood from the patient, a filtration unit for producing plasma water and a line for returning the blood to the patient, defining a main circuit; the extracorporeal circuit further comprises a decarbonating group comprising a secondary circuit for the recirculation of plasma water, means for removing a fraction of said plasma water, a CO.sub.2 exchanger, a cationic resin charged with H+ ions set upstream of the CO.sub.2 exchanger and adapted to generate acid plasma water, means for the infusion of the acid plasma water upstream of the CO.sub.2 exchanger and means for the infusion of ions in a solution downstream of the CO.sub.2 exchanger.

A dialysis system is configured to enable a patient to undergo both peritoneal dialysis and extracorporeal blood treatments. The example dialysis system includes a base unit configurable to provide a first fluid for use in preforming at least one peritoneal dialysis treatment at a first time. The base unit is further configurable to provide a second, different fluid for use in at least one extracorporeal blood treatment at a second, different time. The example dialysis system also includes a blood treatment unit configured to be docked to the base unit. The blood treatment unit includes a blood pump configured to pump blood from the patient to a blood filter and from the blood filter back to the patient. The blood filter or a blood line in communication with the blood filter receives the second fluid from the base unit for use in the at least one extracorporeal blood treatment.

The invention relates to a degasser manifold and a vent manifold for use with a degasser in a dialysis system. The degasser manifold and vent manifold include a plurality of fluid passageways that convey dialysate or gases into and out of the degasser. The degasser manifold and vent manifold can also include components such as valves and sensors for control over the degassing of dialysate.

It is described an extracorporeal blood treatment apparatus (1) with a user interface (12) device capable configuring and allowing execution of one or more isolated ultrafiltration tasks during the course of a dialysis treatment. The extracorporeal blood treatment apparatus (1) is controlled in a normal mode, where dialysis fluid is fed to the blood treatment unit (2), and in an isolated ultrafiltration mode, where fresh dialysis fluid is no longer fed to the blood treatment unit (2).

The present invention relates to a method for removing a first fluid from a blood filter for the blood treatment of a patient and/or for removing blood from the blood filter after completing the blood treatment session. It further relates to a medical treatment apparatus having a control device with which a method for removing a first fluid from a blood filter is executable, a digital storage medium, and a computer program product.