摘要:
The present invention concerns a method for testing the rigidity of a particular disposable for volumetric balancing, for a blood treatment device, comprised of the following steps: filling the disposable or portion thereof with a liquid, enclosing the filled liquid, so that a certain volume of liquid is present in the disposable unit or the portion thereof, supplying and/or discharging a certain volume of liquid, and measuring the change in pressure caused by the supply and/or discharge of the volume of liquid. The present invention further concerns a blood treatment device.
摘要:
The invention relates to a dialysis machine, in particular for hemodialysis and/or hemofiltration, having a dialyzate system and having a water inlet via which the dialyzate system can be connected to an external water supply, characterized in that a constant flow regulator is arranged between the water connection and the dialyzate system.
摘要:
The present invention relates to the field of regulating and presetting pump rates of blood pumps. It is directed at a device and a method in which the blood pressures are monitored upstream and/or downstream from the blood pump, and these values or another value formed from these values are compared with a limit value, which depends on an operating parameter or a pump parameter on the blood pump. In violation of the limit value, the pump rate of the blood pump is modified to such an extent or a new pump rate is determined so that the limit value is no longer violated or the degree of violation is reduced.
摘要:
The invention relates to a method of monitoring an impeller pump used in a medical application, wherein the structure-borne noise arising in the impeller pump is measured and this measured structure-borne noise is compared with a reference curve and/or with a limit value, wherein a signal is output as a sign for a disturbance of the operation of the impeller pump. The invention further relates to a blood treatment apparatus in which the aforesaid method is carried out.
摘要:
The invention relates to a cassette module for processing blood and therapeutic fluids in an extracorporeal blood treatment, dialysis or infusion technology, comprising a base body (302), with a first side and a second side, fluid channels integrated into the base body, a receiving unit (304) to receive a centrifugal pump means for delivering fluids, characterized in that at least some of the fluid channels are arranged on a first side of the base body, and the receiving unit for the centrifugal pump means is arranged on the second side, and the receiving unit for the centrifugal pump means is in fluid connection with the fluid channels on the first side during operation.
摘要:
The invention relates to a positive displacement pump 1 for conveying medical fluids, which pump has a pumping chamber 5 and a positive displacement element 15, and to a blood treatment apparatus comprising a positive displacement pump 1. In addition, the invention relates to a method for controlling a positive displacement pump 1 for conveying medical fluids. The positive displacement pump 1 according to the invention has an actuation member 20 in operative connection with the positive displacement element 20 for displacing or deforming the positive displacement element in order to convey the fluid into the pumping chamber or out of the pumping chamber, and a drive device 21 for displacing the actuation member 20. A control unit 14 is provided for to controlling the drive device 21 and an inlet valve 12 and outlet valve 13. The actuation member 20 is in operative connection with the positive displacement element 15 via a working chamber 19 that is filled with gas and has a sealed volume. In order to achieve a high conveying precision, the pressure in the working chamber 5 is kept constant when the positive displacement element 15 is moved.
摘要:
A balancing device and a method for balancing between an inflow into a blood treatment unit of a medical treatment device and an outflow out of the blood treatment unit are disclosed. The balancing device: includes a balancing unit, which has at least one exchange vessel; means for conveying fluid into and/or out of the exchange vessel and means for interrupting the inflow of fluid into the exchange vessel and/or the outflow of fluid out of the exchange vessel; and a control unit for controlling the means for conveying fluid and the means for interrupting the inflow and/or outflow of fluid by an equalization of pressure between a first work cycle and a second work cycle.
摘要:
The present invention relates to a method for operating an extracorporeal blood treatment apparatus having an extracorporeal blood circuit for a hemodialysis and/or hemofiltration and/or hernodiafiltration by controlling an impeller pump. The invention furthermore comprises that the impeller blood pump is operated in a pulsating manner by adding a pulsating speed portion to a first constant speed.
摘要:
A balancing method and a balancing device (100, 101, 200, 201, 301, 303) for determining a fluid balance between a flow quantity in a first flow path (FW1) and a flow quantity in a second flow path (FW2) are disclosed. The disclosed balancing device (100, 101, 200, 201, 301, 303) comprises the following elements: a differential flow measuring unit (D) for measuring the differential flow between a flow in the first flow path (FW1) and a flow in the second flow path (FW2), a branch from one of the two flow paths (FW1, FW2) for diverting fluid from one of the two flow paths into the other flow path (W), a device for setting the flow quantity (P11, P12) in the additional flow path, which can be controlled in such a way that the measured differential flow fulfills a predetermined condition, and with a device (K) for determining the flow quantity in the additional flow path as a measure of the fluid balance.
摘要:
A device and method for monitoring an access to a patient, an extracorporeal blood circuit and/or a dialyzing fluid system includes a centrifugal pump for conveying blood or dialyzing fluid instead of an occluding pump. Centrifugal pumps bring about a large change in flow rate by even a small change in pressure difference across the pump. The device includes a measuring unit for measuring the flow rate of blood or dialyzing fluid conveyed by the centrifugal pump, and a control and computing unit configured to determine an incorrect vascular access or malfunction if a change in measured flow rate Q is more than a predetermined amount. For example, a small drop in pressure in the venous blood line leads to a marked increase in the flow rate of the centrifugal pump, which is used as a basis for the detection of an incorrect vascular access.