Fresenius Medical Care Deutschland Gmbh

Torsten Hochrein

Frank Hedmann

Sabine Kipp

Sven Sebesta

Pascal Werner

Nadja Schubert

Stefan Saal

Hedmann Frank

Schubert Nadja

Martin Buda

A pump system for generating a volume flow of a dialysis solution in a dialysis machine, the pump system includes at least one piston pump having a piston that cooperates with a working fluid, which exerts a force on a conveying means, and in particular on a membrane. The pump system includes setting means, with which a conveying volume of the at least one piston pump per piston stroke can be reduced, with the setting means having at least one of a position-variable mechanical piston stop to reduce the piston stroke, means to reduce a quantity of the working fluid, and means to reduce a volume of a conveying chamber that cooperates with the conveying means and that contains the dialysis solution to be conveyed.

Pump system, dialysis machine, and method of operating a pump

The present invention relates to an apparatus for determining the static patient pressure, wherein the apparatus comprises a pump in communication with a patient line for conveying a dialysis solution into the abdomen of the patient, and blocking means, in particular a valve by which the patient line is blockable, wherein the apparatus has a pressure chamber that is in fluid communication with the patient line with an open blocking element, with a pressure measurement device furthermore being provided that is arranged such that it measures the pressure in the pressure chamber or a pressure correlated with it; and wherein the apparatus comprises a control unit that is configured such that it effects a pressure build-up in the pressure chamber to a measurement pressure in a first step and opens the blocking element in a second step so that the patient line or a part section thereof is acted on by the measurement pressure of the pressure chamber and with the apparatus having an evaluation unit that evaluates the measured pressure after the opening of the blocking element.

Apparatus and method for determining the static patient pressure

The present invention relates to a device for identifying the connection status between a patient catheter and a cassette system having flexible tubing assembly, which is intended to be used in a dialysis machine, wherein the device comprises the cassette system having flexible tubing assembly and an electrical circuit, which is disposed on the cassette system having flexible tubing assembly as well as on the patient catheter, and wherein the device furthermore comprises a measuring device for measuring at least one electrical property of the electrical circuit, which depends on said connection status.

Device for connection status identification

An apparatus for determining at least one of the peritoneal pressure in the abdomen of a patient, and the drainage state of the abdomen of a patient, includes at least one pump for conveying a dialysis solution into the abdomen, and at least one measurement device for measuring the pressure in the dialysis solution. The apparatus has at least one control unit configured to control the pump and the measurement device such that a first measurement of the pressure is carried out by the measurement device with a stationary pump to obtain a first measured pressure value. The pump subsequently operates to convey a partial volume of the total inflow volume of the dialysis solution into the abdomen. The pump then stops, and a second measurement of the pressure is carried out by the measurement device to obtain a second measured pressure value.

Apparatus for determining the peritoneal pressure

The invention relates to a monitoring system for at least one dialysis machine (e.g. a peritoneal dialysis machine), wherein the monitoring system receives data from a dialysis machine to be monitored via a first data communication network, wherein the data are selected from a group comprising machine data, error codes, operational data, environmental data, consumables data, network data, treatment data, wherein the data received are stored in a manner which is specific to the respective peritoneal dialysis machine, wherein for each machine, at least individual components of the stored data are analyzed wherein, on the basis of the analysis, an action selected from informing a patient, informing a medical professional, informing service personnel, informing a quality management representative is carried out via a second data communication network.

Monitoring system for a dialysis machine

A method of determining a system compressibility value of a medical membrane pump drive is provided which includes moving to a first and second pressure level and detecting a first and second operating parameter value of the membrane pump drive. The system compressibility value is determined on the basis of the detected operating parameter values and the membrane of the membrane pump drive is supported at a rigid surface during the determination of the system compressibility value.

Method of determining a system compressibility value of a medical membrane pump drive

The invention relates to the monitoring of the fluid flow in an apparatus for extracorporeal blood treatment. The device according to the invention and the method according to the invention are based on the fact that, in order to monitor the fluid flow, the change in weight of a collection container is monitored, in which a rinsing fluid is collected during a filling or rinsing phase. The monitoring of the fluid flow according to the invention permits continuous monitoring of the fluid flow both in a treatment mode, in which the blood treatment is carried out, as well as in a filling or rinsing mode, in which the fluid system is filled or rinsed with a fluid.

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Eschenau, Germany

Torsten Hochrein