Patent application number | Description | Published |
20090053083 | METHOD AND DEVICE FOR OPERATING AN ELECTRIC PERISTALTIC HOSE PUMP - The invention relates to a method and to a device for operating an electric peristaltic hose pump, in particular a hose pump for transporting fluids in medical-technical devices, in particular extracorporeal blood treatment devices. In order to monitor the regular operation of a hose pump, the power consumption of the pump or a physical variable in correlation with the power consumption, in particular the pump flow, is monitored. The pump flow includes a periodically non-altering direct component which is superimposed on a periodically altering alternating component. In order to monitor the regular operation of the hose pump, the alternating component of the power consumption in relation to the direct component of the power consumption is monitored as whether it increases and/or decreases during blood treatment. | 02-26-2009 |
20090152179 | Method for Blowing Free a Wetted Hydrophobic Filter, and Device for Carrying Out the Method - This invention relates to a method for clearing a wetted hydrophobic filter, in which in a first step the air permeability of the hydrophobic filter is monitored and in which in a second step the hydrophobic filter is cleared by means of a connected air pump, if it is detected that the hydrophobic filter is clogged. Furthermore, the invention relates to an apparatus for performing this method. | 06-18-2009 |
20100004579 | METHOD AND DEVICE FOR FILLING A SUPPLY DEVICE OF A THERAPY APPLIANCE - The invention relates to a method for the filling of a metering apparatus of a therapy device having an extracorporeal circuit with which the metering apparatus is in communication such that an agent can be infused into the extracorporeal circuit during the operation of the therapy device by means of the metering device, with the method comprising the step of the dilution of a concentrate located in the metering apparatus, wherein the dilution of the concentrate located in the metering apparatus takes place in that the metering apparatus takes up the diluting agent from the extracorporeal circuit in the condition connected to the extracorporeal circuit. | 01-07-2010 |
20100137777 | METHOD AND DEVICE FOR MONITORING A BLOOD TREATMENT UNIT OF AN EXTRACORPOREAL BLOOD TREATMENT DEVICE - The present invention relates to a method and a device for monitoring a blood treatment unit, subdivided by a semipermeable membrane into a blood chamber and a dialysis liquid chamber, of an extra-corporeal blood treatment device, which comprises an extra-corporeal blood circuit having an arterial branch leading to the blood chamber of the blood treatment unit, a venous branch, which extends away from the blood chamber, and a dialysis fluid system, in which the dialysis liquid chamber is arranged. The method according to the present invention and the device according to the present invention are based on the idea that the change of the flow resistance of the dialysis machine is determined based on two measurements, wherein an oscillating pressure signal in the extra-corporeal blood circuit or in the dialysis fluid system is measured before and after the change of the substitution rate and/or ultrafiltration rate, with which the substitute is applied to, or ultrafiltrate is removed from, the blood flowing in the blood circulation system. Preferably, the supply of substitute is interrupted temporarily. | 06-03-2010 |
20100168640 | Method for at Least Partially Draining an Extracorporeal Blood Flow and Haemodialysis Device for Use With Said Method - The invention relates to a method and a hemodialysis machine for at least partial emptying of an extracorporeal blood circulation after the blood of a patient in the extracorporeal blood circulation has been returned to the patient with the help of an infusion liquid which displaces the blood and after the patient has been separated from the extracorporeal blood circulation. The object of the invention is to empty at least the blood chamber of a hemodialyzer ( | 07-01-2010 |
20100204633 | METHOD FOR VERIFYING AND/OR MONITORING THE CORRECT FUNCTION OF A SUPPLY DEVICE - The present invention relates to a method for checking and/or monitoring the correct operation of an adding device of a medical apparatus, wherein the medical apparatus includes an extracorporeal circuit with which the adding device is connected such that an agent can be introduced into the extracorporeal circuit by means of the adding device, the pressure loss in the extracorporeal circuit being measured and evaluated for checking and/or monitoring the correct operation of the adding device. In accordance with the invention, the adding device for this purpose generates an oscillating pressure course. | 08-12-2010 |
20110034814 | METHOD AND DEVICE FOR MONITORING A VASCULAR ACCESS AND EXTRACORPOREAL BLOOD TREATMENT DEVICE COMPRISING A DEVICE FOR MONITORING VASCULAR ACCESS - The invention relates to a method and a device for monitoring a vascular access during an extracorporeal blood treatment. The method and the device according to the invention are based on the monitoring of the difference between the venous pressure measured by a venous pressure sensor and the arterial pressure measured by an arterial pressure sensor (in the extracorporeal blood circuit. According to the method and the device according to the invention, a test function describing disturbances in the extracorporeal blood circuit is determined. Said test function is used to determine a noise-free differential pressure from the measured venous and arterial pressure, said differential pressure being evaluated in an arithmetic and evaluation unit to identify a defective vascular access. | 02-10-2011 |
20110178452 | DEVICE FOR EXTRACORPOREAL BLOOD TREATMENT IN SINGLE-NEEDLE OPERATION MODE - A device for the extracorporal blood treatment in a single-needle operating mode includes means for delivering blood into, and means for delivering blood out of means for collecting blood, and a controller for setting the respective delivery rates of the means for the delivery of blood. The operating mode of the means for delivering blood is continually switched between an arterial and a venous phase by the controller, wherein during the arterial phase the delivery rate Q | 07-21-2011 |
20110230812 | METHOD AND DEVICE FOR RECOGNITION OF PARAVASAL BLEEDING - A method and a device for recognition of paravasal bleeding upon a supplying of blood to a vascular access via a line and/or upon the removal of blood from a vascular access via a line, particularly paravasal bleeding during extra-corporeal blood treatment, such as for hemodialysis, hemofiltration or hemodiafiltration is provided. A device for extra-corporeal blood treatment, particularly for hemodialysis, hemofiltration or hemodiafiltration, comprising a device for recognition of paravasal bleeding is also provided. The method and the device are based on the change of arterial pressure in the arterial branch or the venous pressure in the venous branch of the extra-corporeal circuit being registered during the extra-corporeal blood treatment. If paravasal bleeding occurs during the blood treatment, the positive dynamic pressure on the line leading to the vascular access rises on the venous cannula during the extra-corporeal blood treatment, or the suction pressure on the line leaving the vascular access, such as the arterial cannula during extra-corporeal blood treatment, rises; that is, the suction pressure becomes more negative. The pressure rise begins moderately at first and then becomes increasingly greater. Decisive for the method and the device, therefore, is that pressure changes that come from a pressure level exhibiting a large difference from the reference value find stronger consideration than those that come from a pressure level that exhibits only a minor difference from the reference value. | 09-22-2011 |
20110230814 | METHOD AND APPARATUS FOR MONITORING A PERISTALTIC HOSE PUMP FOR CONDUCTING A FLUID IN A TUBING - The invention further relates to an apparatus and method for monitoring a peristaltic hose pump, in particular a peristaltic hose pump of an extracorporeal blood treatment device. The power consumed by the pump and/or the pressure in the tubing segment upstream or downstream of the pump is/are measured during operation of the pump and test signals I | 09-22-2011 |
20120083726 | METHOD AND DEVICE FOR MONITORING A FLUID SYSTEM OF AN EXTRACORPOREAL BLOOD TREATMENT DEVICE - The present invention relates to a method and a device for monitoring a fluid system of an extracorporeal blood treatment device. In the method according to the present invention and the device according to the present invention, the pressure in a ventilation line branching off the venous drip chamber in the venous blood line is measured, a hydrophobic filter being disposed in the ventilation line. A fault in the fluid system is determined in the absence of pressure variations in the segment of the ventilation line remote from the venous drip chamber. The pressure variations in the ventilation line can be generated downstream of the hydrophobic filter by alternately ventilating the ventilation line that is closed downstream of the hydrophobic filter during blood treatment. | 04-05-2012 |
20120199526 | DEVICE AND METHOD FOR INSPECTING A FILTER FOR AN EXTRACORPOREAL BLOOD TREATMENT DEVICE - The present invention relates to devices and methods for inspecting filters for extracorporeal blood treatment devices, e.g., filters for filtering dialysis fluid. The inspection of the filter according to the present invention is based on the measurement of the flow potential before and after changing the fluid flow of an electrolytic fluid between a transversal flow through the semi-permeable membrane of the filter and a longitudinal flow along the semi-permeable membrane of the filter, or vice versa. Changing the flow direction of the electrolytic fluid results in a change to the conductivity proceeding from a base value P to a higher value P | 08-09-2012 |
20120318739 | METHOD FOR REGULATING THE SUPPLY OF SUBSTITUTING DURING EXTRACORPOREAL BLOOD TREATMENT AND EXTRACORPOREAL BLOOD TREATMENT DEVICE COMPRISING A UNIT FOR REGULATING THE SUPPLY OF SUBSTITUATE - The present invention relates to a method for regulating supply of substituate in an extracorporeal blood treatment with an extracorporeal blood treatment apparatus comprising a dialyzer divided by a semipermeable membrane into a blood chamber and a dialyzing fluid chamber and a device for supplying substituate. Moreover, the present invention relates to an extracorporeal blood treatment apparatus having a device for regulating supply of substituate. Regulation of supply of substituate in the extracorporeal blood treatment takes place as a function of the rheological loading of the dialyzer. To regulate supply of substituate during extracorporeal blood treatment, rheological loading of the dialyzer is determined from transmembrane pressure on the dialyzer and flow resistance of the dialyzer and substituate rate is increased or reduced according to the loading. The selection of dialyzer parameters or blood parameters is therefore no longer necessary and the distinction between pre-dilution and post-dilution is also made obsolete. | 12-20-2012 |
20130056418 | DIALYSATE FLOW CONTROL - Method and apparatus for controlling the dialysate flow in a dialysis device. A change of the value of a control factor, caused by a variation of a property of the dialysate or of the blood or by a change of the dialysate flow, is determined in order to control the dialysate flow. The control factor is a measure for the exchange of substances via the dialyzer and thus the effectiveness of the dialyzer. If the change of the value of the control factor exceeds a limit, the dialysate flow is increased. On the other hand, the dialysate flow is reduced if the change of the value of the control factor falls short of the limit range. | 03-07-2013 |
20130193039 | DEVICE AND METHOD FOR DETECTING THE DIRECTION OF THE FLOW OF LIQUID THROUGH A DIALYZER - The present invention relates to a device and a method for detecting the direction of the fluid flow through a dialyzer, as well as an extracorporeal blood treatment apparatus which comprises a device for detecting the direction of the fluid flow through the dialyzer. The devices and methods according to the present invention are based on the change in a physical and/or chemical property, for example the substance concentration or the temperature, of a fluid flowing into the one chamber of the dialyzer and the measurement of the change in the physical and/or chemical property of the fluid flowing out of the one chamber of the dialyzer. | 08-01-2013 |
20130274613 | METHOD AND DEVICE FOR RECOGNITION OF PARAVASAL BLEEDING - A method and a device for recognition of paravasal bleeding upon a supplying of blood to a vascular access via a line and/or upon the removal of blood from a vascular access via a line is provided. A device for extracorporeal blood treatment comprising a device for recognition of paravasal bleeding is also provided. The method and the device are based on the change of arterial pressure in the arterial branch or the venous pressure in the venous branch of the extra-corporeal circuit being registered during the extracorporeal blood treatment. One aspect of the method and the device is that pressure changes that come from a pressure level exhibiting a large difference from a reference value are more strongly considered than those that come from a pressure level that exhibits only a minor difference from the reference value. | 10-17-2013 |
20130280104 | METHODS AND DEVICES FOR MODULATION OF THE OPERATING POINT OF LIQUID PUMPS IN MEDICAL TREATMENT DEVICES - The invention relates to the field of fluid pumps and medical treatment devices, in particular dialysis machines. The object of the invention is to design methods and devices such that the operating pressures and flow rates of the fluid pumps assume the desired characteristics, in particular constant values or controlled profiles. This object is achieved in that the operating point of a peristaltic hose roller pump is adjusted based on the angle of rotation of the pump rotor or by adjusting the operating point of a centrifugal pump in accordance with a profile. | 10-24-2013 |
20130303964 | APPARATUS FOR EXTRA-CORPOREAL BLOOD TREATMENT AND METHOD OF DETERMINING A BLOOD FLOW RATE FOR AN EXTRA-CORPOREAL BLOOD TREATMENT APPARATUS - An apparatus and method of determining the blood flow rate at which, in an extra-corporeal blood circuit of an extra-corporeal blood treatment apparatus, blood is pumped through the arterial blood line into the blood chamber of the dialyser and out of its blood chamber through the venous blood line is described. The method and apparatus provide for the determination of a plurality of parameters characteristic of the extra-corporeal blood treatment, with a given blood flow rate being determined in each case as a function of one of the characteristic parameters. A blood flow rate which is preset for the blood treatment is selected from the plurality of blood flow rates determined on the basis of the characteristic parameters. The blood flow rate to be preset is selected on the basis of a preset algorithm which may be implemented in software installed on a data processing unit or in hardware. | 11-14-2013 |
20130345623 | DEVICE AND METHOD FOR CREATION AND DISPLAY OF GRAPHIC CODING SPECIFIC FOR MEDICAL DEVICES AND MEDICAL TREATMENTS - The present invention relates to the field of information display and forwarding with medical machines, in particular display and forwarding of information pertaining to the medical machine such as treatment information, equipment information and software codes. The invention is based on the problem of providing the patient with information about his/her treatment in a simple and convenient manner and/or providing the operator or service personnel of the medical machine information pertaining to the equipment of the medical machine and/or its software options in a simple and convenient manner. A method and a device in which characteristic graphic codes are generated and displayed and which can be input and decoded by a portable device are proposed for this purpose. | 12-26-2013 |
20140098359 | METHOD AND APPARATUS FOR MONITORING A TREATMENT OF A PATIENT, PREFERABLY FOR MONITORING HEMODIALYSIS, HEMODIAFILTRATION, AND/OR PERITONEAL DIALYSIS - The present invention pertains to a method for monitoring a treatment of a patient, preferably for monitoring hemodialysis, hemodiafiltration and/or peritoneal dialysis, the method comprising the steps of irradiating a sample of a dialysis liquid used in the treatment with irradiation light of at least a first irradiation wavelength, detecting light emitted by the irradiated sample in at least a first detection wavelength, the detection wavelength being different from the first irradiation wavelength, and determining the presence and/or concentration of at least one analyte in the sample on the basis of the detected light. | 04-10-2014 |
20140246373 | PROCESS AND DEVICE FOR MONITORING THE SUPPLY OF SUBSTITUTION FLUID DURING AN EXTRACORPOREAL TREATMENT OF BLOOD - The invention relates to a process for monitoring the supply of substitution fluid upstream or downstream of a dialyser or filter arranged in an extracorporeal blood stream. One embodiment provides, for the detection of predilution or postdilution, for measuring the pressure in the blood stream downstream of the dialyser or filter, predilution or postdilution being recognized on the basis of the change in pressure following the shutting off and/or starting up of the substituate pump provided for conveying the substitution fluid. Another embodiment provides for recognizing predilution or postdilution on the basis of the comparison of the oscillating pressure signal attributable to the substituate pump to a characteristic reference signal. The characteristic reference signal to which the pressure signal of the substituate pump is compared is preferably the oscillating pressure signal of a blood pump arranged in the blood stream for conveying the blood upstream of the dialyser or filter. In addition, the invention relates to an extracorporeal blood treatment device with a facility for detecting predilution or postdilution, which device operates according to the processes detailed above. | 09-04-2014 |