Abstract: The invention relates to a method of flushing an extracorporeal blood circuit, preferably an extracorporeal blood circuit of a dialysis machine, with a flushing liquid, wherein the flushing liquid contains an anticoagulant agent, preferably heparin. The invention further relates to an extracorporeal blood treatment unit, preferably to a dialysis machine, having an extracorporeal blood circuit and a control unit, wherein the control unit is configured to carry out a flushing method in accordance with one of the preceding claims before the start of the treatment and/or intermittently during the treatment.

Abstract: The invention relates to a method of purging gas bubbles from at least one target zone of an extracorporeal blood circuit, preferably of an extracorporeal blood circuit of a dialysis machine, with a flushing liquid, wherein the flow rate and/or the pressure of the flushing liquid in the extracorporeal blood circuit is/are inconstant at least at times during the flushing process; and/or wherein the flow rate of the flushing liquid in the extracorporeal blood circuit lies above a range of possible flow rates at least at times during the flushing process, which range is used during the treatment for the blood. The invention furthermore relates to an extracorporeal blood treatment unit having an extracorporeal blood circuit, a pump and a control unit, with the control unit being configured to carry out a flushing process in accordance with the invention.

Abstract: The invention relates to a method of purging gas bubbles from a target zone of an extracorporeal blood circuit of a dialysis machine, wherein the target zone is flowed through by flushing liquid which enters into the target zone through an inflow and exits it again through an outflow, wherein the inflow differs from the arterial port and the outflow differs from the venous port of the extracorporeal blood circuit. The invention furthermore relates to a dialysis machine having an extracorporeal blood circuit and a control unit, with the extracorporeal blood circuit having an inflow and an outflow for flushing liquid, with the inflow differing from the arterial port and the outflow differing from the venous port of the extracorporeal blood circuit, and with the control unit being configured to carry out a method in accordance with the invention.

Abstract: The present invention relates to a dialysis machine having an extracorporeal circuit in which a dialyzer is located which has a chamber on the blood side which is flowed through by blood and a first pressure sensor, which is located upstream of the chamber on the blood side in the direction of flow of the blood, for determining a first pressure value and a second pressure sensor, which is located downstream of the chamber on the blood side in the direction of flow of the blood, for determining a second pressure value, wherein the dialysis machine has first means for determining the pressure difference between the second pressure value and the first pressure value, second means for determining the dynamic viscosity of the blood on the basis of the determined pressure difference, of the blood flow rate through the chamber on the blood side and of one or more characteristic properties of the dialyzer and third means for determining the hematocrit or the hemoglobin value of the blood on the basis of the determine

Abstract: The invention relates to a method of purging gas bubbles from a target zone of an extracorporeal blood circuit of a dialysis machine, wherein the target zone is flowed through by flushing liquid which enters into the target zone through an inflow and exits it again through an outflow, wherein the inflow differs from the arterial port and the outflow differs from the venous port of the extracorporeal blood circuit. The invention furthermore relates to a dialysis machine having an extracorporeal blood circuit and a control unit, with the extracorporeal blood circuit having an inflow and an outflow for flushing liquid, with the inflow differing from the arterial port and the outflow differing from the venous port of the extracorporeal blood circuit, and with the control unit being configured to carry out a method in accordance with the invention.

Abstract: The invention relates to a method of purging gas bubbles from at least one target zone of an extracorporeal blood circuit, preferably of an extracorporeal blood circuit of a dialysis machine, with a flushing liquid, wherein the flow rate and/or the pressure of the flushing liquid in the extracorporeal blood circuit is/are inconstant at least at times during the flushing process; and/or wherein the flow rate of the flushing liquid in the extracorporeal blood circuit lies above a range of possible flow rates at least at times during the flushing process, which range is used during the treatment for the blood. The invention furthermore relates to an extracorporeal blood treatment unit having an extracorporeal blood circuit, a pump and a control unit, with the control unit being configured to carry out a flushing process in accordance with the invention.

Abstract: The invention relates to a method of flushing an extracorporeal blood circuit, preferably an extracorporeal blood circuit of a dialysis machine, with a flushing liquid, wherein the flushing liquid contains an anticoagulant agent, preferably heparin. The invention further relates to an extracorporeal blood treatment unit, preferably to a dialysis machine, having an extracorporeal blood circuit and a control unit, wherein the control unit is configured to carry out a flushing method in accordance with one of the preceding claims before the start of the treatment and/or intermittently during the treatment.

Abstract: The invention relates to a method of increasing the leak tightness of a mechanical connector of an extracorporeal blood treatment machine, wherein the mechanical connector has a pair of connection parts which have corresponding sealing surfaces, with at least one of the two sealing surfaces being wetted at least sectionally by a viscous fluid before the joining together of the connection parts and/or with the connection gap between the connection parts being covered by a sheath after their joining together. The invention further relates to an extracorporeal blood treatment machine comprising a mechanical connector which has a pair of connection parts which have corresponding sealing surfaces, with the sealing surfaces being at least sectionally wetted with a viscous liquid with a closed connector and/or with the connection gap between the connection parts of the closed connector being covered by a sheath.

Abstract: A device for separating gas bubbles out of medical fluids, in particular blood, has a substantially cylindrical chamber, an inlet connection arranged in the longitudinal direction of the chamber, an outlet connection and a flow-guide member attached to the inlet connection and having a plurality of flow channels, which extend in a space curve out of the longitudinal direction of the chamber in a direction running substantially tangential to the inner wall of the chamber. An orifice, which is sealed by a hydrophobic membrane, is provided in the cover part of the chamber. Since the outlet orifices of the flow channels are arranged directly underneath the cover part, the membrane is circumflowed by the inflowing fluid, avoiding the formation of dead zones. The device makes it possible to separate out air bubbles with a substantial degree of reliability, without the danger of the hydrophobic membrane becoming obstructed from contact with the blood.

Abstract: Apparatus for measuring the pressure of a fluid includes a first pressure transmission element in form of a membrane in contact with a pressure sensor, and a second pressure transmission element in form of a membrane which is acted upon by a fluid whose pressure is to be determined. The first membrane has a peripheral area which is pressed against the second membrane in such a manner that the space between the first and second membranes is sealed off from outside and is of a size as small as possible. Both membranes thus move in synchronism in dependence of the fluid pressure so that positive as well as negative pressures can be measured.