Automated hemodialysis chemical treatment system

Details Automated hemodialysis chemical treatment system Automated hemodialysis chemical treatment system

A - Human Necessities

61

M

A61M 1/16 (2006.01)

Patent

CA 2099764

An improved chemical treatment system (10) for hemo- dialysis machines, which in- cludes a first three way valve (26) which has a normally open position in the dialysis and rin- sing modes of the hemodialysis machine. The valve in the nor- mally open position couples a source of water (12) through the valve to the bicarbonate pump < 1 M G > (66) for rinsing purposes before and after dialysis and the chem- ical treatment modes of the he- modialysis machine. In the chemical treatment mode of the hemodiaiysis machine the valve is switched to couple a source (90) of treatment chemical through the valve to the bicarb- onate pump. The chemical treatment system includes a sec- ond valve (78), which if in the normally open .position, then only the bicarbonate portion and associated downstream portions will be chemically treated. In the closed position, the chemical will be switched to also flow through the whole hemodialysis machine from the water inlet to pro- vide for a half or total system chemical treatment cycle. A vent valve (98) coupled to the first valve can be included to further en- sure that chemicals are not inadvertently entered into the hemodialysis machine.

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