Apparatus for extracorporeal blood treatment
AssigneeGambro Lundia AB
InventorsMassimo Fava, Mauro Suffritti, Anna Puppini
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Abstract
An apparatus (1) for extracorporeal blood treatment comprising a blood treatment device (2) having a semipermeable membrane (5) which separates a blood chamber (3) from a fluid chamber (4). A used fluid line (7) connects the fluid chamber to a used fluid discharge. A first pump (8) controls the ultrafiltration through the semipermeable membrane. A second pump (9) arranged in the used fluid line downstream of the first pump keeps pressure between the first and the second pump at a constant predetermined value. The invention provides a protection system against any possible pressure change in the used fluid discharge in a hemodialysis or hemo(dia)filtration apparatus.
Claims15
An apparatus for extracorporeal blood treatment comprising:
- a blood treatment device having a blood chamber, a fluid chamber, and a semipermeable membrane separating the blood chamber from the fluid chamber;
- a used fluid line configured to connect the blood treatment device to a used fluid discharge;
- a first actuator predisposed in the used fluid line, the first actuator being configured to control a pressure and/or a fluid flow rate in the fluid chamber;
- a protection system configured to uncouple pressure conditions in the blood treatment device from pressure conditions at the used fluid discharge, said protection system comprising:
- a second actuator arranged in the used fluid line between the first actuator and the used fluid discharge, the second actuator being configured to control a pressure in an intermediate tract of the used fluid line, said intermediate tract being comprised between the first actuator and the second actuator;
- a first pressure sensor configured to emit a pressure signal indicating a pressure in said intermediate tract of the used fluid line;
- a control unit programmed for controlling the second actuator to keep pressure in said intermediate tract of the used fluid line at a desired value.
Dependencies are inferred from the claim text.