Abstract:
A dialysis system includes at least one pump to conduct a fluid through a fluid circuit, a conductivity meter to measure conductivity values of the fluid, at least one conductivity detector to measure conductivity values of the fluid, and a controller. The controller is configured to receive the conductivity values from the conductivity meter and the sensor values from the at least one conductivity detector, compute a plurality of representative conductivity values from the received conductivity values and a plurality of representative sensor values from the received sensor values, determine a first conductivity point associated with a first representative conductivity value and a first representative sensor value, determine a second conductivity point associated with a second representative conductivity value and a second representative sensor value; and compute a calibration curve based on the first and second calibration points.
Abstract:
Die vorliegende Erfindung betrifft eine Steuer- und/oder Regelungsvorrichtung (4000), welche mit einer ersten, insbesondere von einem Arzt betätigbaren Eingabevorrichtung (4100) und mit einer zweiten, insbesondere von einem Patienten (P) betätigbaren Eingabevorrichtung (4200) jeweils in Signalverbindung verbunden ist, wobei die Steuer- oder Regelungsvorrichtung (4000) programmiert ist, um in Signalverbindung mit einer Blutbehandlungsvorrichtung (1000), welche wiederum mit einem Blutfilter (3000) verbunden ist, eine Blutbehandlung des Patienten (P) unter Ausführen folgender Schritte zu steuern und/oder zu regeln: Steuern und/oder Regeln der Blutbehandlungsvorrichtung (1000) zur Blutbehandlung des Patienten (P) mit einer ersten, als Ausgangseinstellung (UF_A) bezeichneten, mittels der ersten Eingabevorrichtung (4100) eingestellten Einstellung für wenigstens einen Behandlungsparameter (UF_rate); Überprüfen, ob mittels der zweiten Eingabevorrichtung (4200) eine Eingabe erfolgt ist; Auswerten der mittels der zweiten Eingabevorrichtung (4200) erfolgten Eingabe und/oder Festlegen einer zweiten, als Zieleinstellung (UF_Z) bezeichneten Einstellung für den wenigstens einen Behandlungsparameter (UF_rate) basierend auf der mittels der zweiten Eingabevorrichtung (4200) erfolgten Eingabe; und Steuern oder Regeln der Blutbehandlungsvorrichtung (1000) zur Blutbehandlung des Patienten (P) mit der zweiten Einstellung und/oder Steuern oder Regeln der Blutbehandlungsvorrichtung (1000) unter Anpassen oder Ändern der Ausgangseinstellung (UF_A) entsprechend der Eingabe oder der Zieleinstellung (UF_Z). Ferner werden ein Verfahren und eine Blutbehandlungsvorrichtung (4000) vorgeschlagen.
Abstract:
A portable hemodialysis system is provided suitable for in home use. The hemodialysis system includes a disposable cartridge and a reused dialysis machine. The disposable cartridge includes a dialyzer, and a dialysate flow path and a blood flow path which flow in opposing directions through the dialyzer. In addition, the disposable cartridge possesses pump actuators (but not pump motors) for pumping dialysate and blood through their respective flow paths. The pump actuators having non-deformable components including a housing having a central cavity forming an internal sidewall, a rotor eccentrically positioned within the cavity having radially aligned slots at the rotor's periphery, and vanes slideably positioned in the slots to slide in and out of the slots so as to seal with the cavity's internal sidewall creating vane chambers that pump blood or dialysate.
Abstract:
A portable hemodialysis system is provided including a disposable cartridge and a reused dialysis machine. The disposable cartridge includes a dialyzer, and a dialysate flow path and a blood flow path which flow in opposing directions through the dialyzer. The disposable cartridge includes a filter for removing waste products from the dialysate, and pressure and fluid flow sensors for measuring the pressure and fluid flow in the dialysate flow path and blood flow path. In addition, the disposable cartridge possesses pump actuators (but not pump motors) for pumping dialysate and blood through their respective flow paths. The reused dialysis machine possesses a reservoir for dialysate, a level sensor, a blood leak sensor, an ammonia sensor, a venous blood line pressure sensor, a venous blood line bubble detector, pump motors, and a processor connected to the motors and sensors for controlling and monitoring hemodialysis treatment.
Abstract:
A dialysis system (10a) includes: a dialysis fluid pump receptacle (64) actuated by a dialysis fluid pump actuator; a dialysis fluid line (70); a blood filter (40) in fluid communication with the dialysis fluid pump receptacle via the dialysis fluid line; an extracorporeal circuit (16); a blood pump receptacle (30a, 30b) actuated by a blood pump actuator and in fluid communication with the blood filter via the extracorporeal circuit; and a control unit (50) that (i) in a first treatment pumps peritoneal dialysis fluid through the dialysis fluid pump receptacle, the dialysis fluid line, the blood filter, the extracorporeal circuit and the blood pump receptacle to the patient's peritoneum operating the dialysis fluid pump actuator and the blood pump actuator at a first pressure, and (ii) in a second treatment pumps blood through the extracorporeal circuit, the blood pump receptacle and the blood filter operating the blood pump actuator at a second, different pressure.
Abstract:
This disclosure relates to medical fluid sensors and related systems and methods. In certain aspects, a nuclear magnetic resonance device includes a support frame, a first magnet connected to the support frame, a second magnet connected to the support frame in a manner such that the second magnet is disposed within the magnetic field of the first magnet and a magnetic attraction exists between the first magnet and the second magnet, and a spacer disposed between the first magnet and the second magnet. The spacer is configured to maintain a space between the first magnet and the second magnet.
Abstract:
This disclosure relates to medical fluid sensors and related systems and methods. In certain aspects, a method includes using a medical fluid pump of a medical fluid pumping machine, such as a hemodialysis machine, to deliver medical fluid to a first portion of a cartridge that is positioned within a magnetic field, exciting atoms in the medical fluid in the first portion of the cartridge by applying radio frequency energy to the medical fluid in the first portion of the cartridge, receiving radio frequency energy generated by the excited atoms in the medical fluid in the first portion of the cartridge, and determining a concentration of a substance in the medical fluid based on the received radio frequency energy generated by the excited atoms in the medical fluid in the first portion of the cartridge.
Abstract:
It is disclosed an apparatus for extracorporeal blood treatment (1) having a control unit (15) connected to an ultrafiltration device (20) and to a fluid preparation section (30) of fresh dialysis liquid. The control unit (15) is configured to receive measured values of the change of blood volume, the amount of ultrafiltration volume, and conductivity or to the concentration for at least one substance in the blood (BV%mes(t); UFmes(t), WLmes(t); Cbmes(t)); the control unit (15) is also configured to receive prescription values for the same parameters and to control ultrafiltration and adjust conductivity in the fresh dialysis liquid based on the difference between said measured values and said prescription values.
Abstract:
Systems and methods for controlling fluid movement and volumes of fluid between a subject and a controlled compliant flow path. The controlled compliant flow path has a means for selectively metering in and metering out fluid from the controlled compliant flow path. An extracorporeal flow path is in fluid communication with the controlled compliant flow path across a semi-permeable membrane where the extracorporeal flow path has a first terminal end and a second terminal end.
Abstract:
An apparatus for extracorporeal treatment of blood (1) comprising a filtration unit (2), a blood withdrawal line (6), a blood return line (7), an effluent fluid line (13), a pre and/or post-dilution fluid line (15, 25) connected to the blood withdrawal line, and a dialysis fluid line. Pumps (17, 18, 21, 22, 27) act on the fluid lines for regulating the flow of fluid. A control unit (10) is configured to periodically calculate a new value for the patient fluid removal rate to be imposed on an ultrafiltration actuator in order to keep a predefined patient fluid removal rate across a reference time interval irrespective of machine down times.