Abstract:
An access disconnection system includes an extracorporeal circuit; first and second contacts provided in the extracorporeal circuit; a current source communicating with the first contact and configured to generate a current within fluid flowing through the extracorporeal circuit; and an apparatus positioned to apply a signal at multiple points along a path from the extracorporeal circuit, the signals tending to prevent at least a portion of the current from traveling through a ground path in parallel to the extracorporeal circuit.
Abstract:
A dialysate testing method in one embodiment includes placing electrical contacts in a dialysate flow path, measuring an electrical property of the dialysate as it flows through the flow path and past the contacts, and determining whether the dialysate has been mixed properly from the detected electrical property. A dialysate testing method in another embodiment includes flowing dialysate past a pair of electrical contacts, calculating a conductivity of the dialysate using an algorithm that takes into account a geometry of the contacts, and using the calculated conductivity to determine if the dialysate has been removed properly.
Abstract:
A dialysis system instrument includes a dialysis instrument (10), a disposable pumping and valving cassette apparatus (30) operable with pumping and valving actuators of the dialysis instrument, the disposable cassette (50) including an electronic cell (100c) and electronics associated with the electronic cell, the electronics configured to determine an electrical property of a solution flowing through the electronic cell of the disposable apparatus.
Abstract:
A dialysate testing method in one embodiment includes placing electrical contacts in a dialysate flow path, measuring an electrical property of the dialysate as it flows through the flow path and past the contacts, and determining whether the dialysate has been mixed properly from the detected electrical property. A dialysate testing method in another embodiment includes flowing dialysate past a pair of electrical contacts, calculating a conductivity of the dialysate using an algorithm that takes into account a geometry of the contacts, and using the calculated conductivity to determine if the dialysate has been removed properly.
Abstract:
A dialysis system instrument includes a dialysis instrument (10), a disposable pumping and valving cassette apparatus (30) operable with pumping and valving actuators of the dialysis instrument, the disposable cassette (50) including an electronic cell (100c) and electronics associated with the electronic cell, the electronics configured to determine an electrical property of a solution flowing through the electronic cell of the disposable apparatus.
Abstract:
An access disconnection system includes an extracorporeal circuit; first and second contacts provided in the extracorporeal circuit; a current source communicating with the first contact and configured to generate a current within fluid flowing through the extracorporeal circuit; and an apparatus positioned to apply a signal at multiple points along a path from the extracorporeal circuit, the signals tending to prevent at least a portion of the current from traveling through a ground path in parallel to the extracorporeal circuit.
Abstract:
An access disconnection system includes an extracorporeal circuit; first and second contacts provided in the extracorporeal circuit; a current source communicating with the first contact and configured to generate a current w ithin fluid flowing through the extracorporeal circuit; and an apparatus pos itioned to apply a signal at multiple points along a path from the extracorp oreal circuit, the signals tending to prevent at least a portion of the curr ent from traveling through a ground path in parallel to the extracorporeal c ircuit.
Abstract:
Un sistema de desconexión de acceso que comprende: un circuito (35) extracorpóreo; unos contactos (24, 22) arterial y venoso proporcionados en el circuito (35) extracorpóreo; unos aparatos (36) de acceso del paciente arterial y venoso; una fuente (160) de señales que comunica con al menos uno de los contactos (24, 22) arterial y venoso y configurada para generar una señal dentro de un fluido que fluye a través del circuito (35) extracorpóreo; y un aparato de detección (254) configurado para detectar una primera parte de la señal indicativa de una primera impedancia (RDA, RDV) producida por un fluido que fluye a través de una primera parte del circuito (35) extracorpóreo; en el que al menos uno de los contactos (24, 22) arterial y venoso está colocado suficientemente cerca de un aparato (36) de acceso del paciente arterial y venoso respectivo de tal manera que una segunda parte de la señal indicativa de una segunda impedancia (RUV) producida por un fluido que fluye a través de una segunda parte del circuito (35) extracorpóreo aumenta en relación con la primera impedancia (RDA, RDV) hasta el punto de que pueden ignorarse los efectos de un circuito cerrado de tierra paralelo (250).
Abstract:
Se describe un sistema de desconexión de acceso que incluye un circuito extracorpóreo; primeros y segundos contactos proporcionados en el circuito extracorpóreo; una fuente de corriente que se comunica con el primer contacto y que está configurada para generar una corriente dentro del fluido que fluye a través del circuito extracorpóreo; y un aparato colocado para aplicar una señal en puntos múltiples a lo largo de una trayectoria del circuito extracorpóreo, en donde las señales tienden a evitar que al menos una parte de la corriente recorra a través de una trayectoria a tierra en paralelo al circuito extracorpóreo.