Deutsches Zentrum Fur Luft-und Raumfahrt E.v.

Nephrodite LLC

Deutsches Zentrum Fuer Luft-und Raumfahrt E.v

Dualis Medtech Gmbh

Deutsches Zentrum Fur Luft-und

Wolfgang Schiller

Thomas Schmid

Bernhard Vodermayer

Harald Wagner

Norbert Sporer

Alexandra Wimmer

Andreas Kunz

Heinrich Gmeiner

Hiep T Nguyen

A method for operating a portable dialysis device, comprising the following steps: continuously and alternately filling and emptying a hydraulic chamber with hydraulic fluid by a pump, wherein upon filling the hydraulic chamber, an at least partially flexible delivery membrane is moved towards a blood chamber adjoining the hydraulic chamber, in which blood is received, and wherein the blood flows tangentially along an inner wall of the blood chamber through an inlet side, whereby the blood chamber is compressed to eject the blood, and enhancing a return flow of the blood from the blood chamber while avoiding dead points in the flow in the blood chamber, and wherein upon emptying the hydraulic chamber, the delivery membrane is moved away from the blood chamber so that the blood chamber expands to receive the blood, so that a continuous, alternate compression and expansion of the blood chamber by the delivery membrane occurs, such that a continuous uninterrupted exchange of the blood in the blood chamber is performed while avoiding the formation of thrombi.

Portable dialysis device

A portable dialysis device that can be continuously worn in and/or on the body of a patient, with a blood chamber in which the patient's blood can be received, a hydraulic chamber which can be filled with a hydraulic fluid and which adjoins the blood chamber, an at least partially flexible delivery membrane which is arranged between the hydraulic chamber and the blood chamber and which, when the hydraulic chamber is filled with hydraulic fluid, is movable in the direction of the blood chamber in such a way as to cause a compression of the blood chamber and therefore an ejection of the blood located therein, a pump for controllable filling and/or emptying of the hydraulic fluid in the hydraulic chamber, such that blood can in this way be conveyed into the blood chamber and/or out of the latter, a filter membrane which is arranged between the blood chamber and the hydraulic chamber and through which waste substances in the blood can be removed to the hydraulic fluid located in the hydraulic chamber, such that the hydraulic fluid serves at the same time as dialysate. Additionally, a method for operating a portable dialysis device.

According to one embodiment, a dialysis device is made available that can be implanted at least partially into the body of a patient and comprises a blood chamber, through which the patient's blood can flow, a dialysis chamber for receiving a dialysate, and a hydraulic pump device for compressing the two chambers alternately by means of a hydraulic fluid, wherein both chambers are each equipped with two valves for controlling the inflow and outflow of blood and dialysate, respectively, and wherein both chambers are connected to each other in an area designed as a membrane.

Dialysis device

A heart assistance device for the pulsatile delivery of blood is provided that includes a first pump chamber, a second pump chamber, and a pump. Both pump chambers each have a fluid chamber and a blood-carrying chamber. By means of the pump, each fluid chamber can be filled with a fluid or emptied thereof in such a way that an expansion or contraction of the fluid chamber takes place. During the expansion of the fluid chamber of one pump chamber, a compression of the blood-carrying chamber of the same blood chamber takes place. The pump is designed as a roller cell pump or vane pump.

Heart assistance device

A heart support device for pulsatile delivery of blood comprising a first and a second ventricle and a pump. Both ventricles comprises a fluid chamber and a blood-conveying chamber, wherein each fluid chamber can be filled with a fluid or emptied by way of the pump in such a way that an expansion or contraction of the fluid chamber occurs. In an expansion of the fluid chamber of a ventricle, a compression of the blood-conveying chamber of the same ventricle takes place, wherein a rigid pressure plate is disposed between a fluid chamber and the respective blood-conveying chamber, said pressure plate being able to move in the direction of the respective blood-conveying chamber.

Heart support device

For connecting a cardiac biventricular assist means including a dual-chamber pumping device, and an electrically powered compressor means provided between the two chambers () a partially flexible one-part or multi-part adapter () is provided with two through-passageways () each separate from the other, said adapter being securely held, on the one hand, in a port () in the apical portion of the septum () and, on the other, in a port () in/at the apex of the left ventricle () so that the through-passageway () extending into the left ventricle () is connected directly or by means of a first flexible tube () to the inlet () of the one chamber () and the other through-passageway () extending into said right ventricle () is connected directly or by means of a second flexible tube () to the inlet () of the other chamber ().

Device for connecting a cardiac biventricular assist means

A fully implantable left ventricular assist system comprising a pumping means connectable via adapter elements to the ventricle includes two compressible chambers in the form of sacs () and a compressing means () to alternatingly fill and discharge the compressible chambers () at the same time, including a drive unit () assigned thereto, a cooling means () for cooling the drive unit (), and a power supply unit () for the drive unit () and cooling means (). In this implantable system the pumping means, compression means (), drive unit () and part of the cooling means () are accommodated in a two-part housing () on which tubular ports () for connecting Y-shaped adapter elements () are configured.

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Bonn, Germany

Wolfgang Schiller