Degassing device

A - Human Necessities – 61 – M

Patent

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Details

A61M 1/36 (2006.01) B01D 19/00 (2006.01)

Patent

CA 2718169

A degassing device (10) for degassing gas bubbles out of a liquid is provided, the degassing device comprising a housing having a liquid inlet (11), a liquid outlet and a gas bubble outlet, the housing further comprising a spiral wall (14) defining a spiral flow path for the liquid and a hydrophobic membrane placed above the spiral wall and between the spiral wall and the gas bubble outlet, the spiral wall forcing inward flux liquid entering into the housing through the inlet into a spiral flow along the spiral flow path, and causing an upward flow of the gas bubbles towards the hydrophobic membrane. Use of such a degassing device in an extracorporeal circuit for degassing gas bubbles out of blood and a method for degassing gas bubbles out of a liquid, particularly out of blood, particularly during haemodialysis, haemofiltration, and haemodiaf iltration is disclosed.

Dispositif (10) de dégazage servant à extraire des bulles de gaz dun liquide, le dispositif de dégazage comprenant un boîtier doté dune entrée (11) de liquide, une sortie de liquide et une sortie de bulles de gaz, le boîtier comprenant en outre une paroi (14) en spirale définissant un passage découlement en spirale pour le liquide et une membrane hydrophobe placée au-dessus de la paroi en spirale et entre celle-ci et la sortie de bulles de gaz, la paroi en spirale influençant le liquide entrant pénétrant dans le boîtier par lentrée pour créer un écoulement en spirale le long du passage découlement en spirale, et provoquant un écoulement ascendant des bulles de gaz en direction de la membrane hydrophobe. L'invention concerne également lutilisation dun tel dispositif de dégazage dans un circuit extracorporel afin dextraire des bulles de gaz du sang, et un procédé destiné à extraire des bulles de gaz dun liquide, en particulier du sang, plus particulièrement pendant une hémodialyse, une hémofiltration et une hémodiafiltration.

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