An apparatus for extracorporeal blood treatment

A - Human Necessities – 61 – M

Patent

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A61M 1/16 (2006.01)

Patent

CA 2668749

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.

Un appareil (1) pour traitement sanguin extracorporel comporte un dispositif de traitement sanguin (2) muni d'une membrane semi-perméable (5) qui sépare une chambre sanguine (3) d'une chambre fluidique (4). Une ligne de fluide utilisé (7) relie la chambre fluidique à une décharge de fluide utilisé. Une première pompe (8) commande l'ultrafiltration à travers la membrane semi-perméable. Une seconde pompe (9) disposée en aval de la première pompe sur la ligne de fluide utilisé maintient la pression entre la première et la seconde pompe à une valeur prédéterminée constante. L'invention concerne un système de protection contre tout changement de pression éventuel dans la décharge de fluide utilisé dans un appareil d'hémodialyse ou d'hémo(dia)filtration.

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