Method and apparatus for preparing a substitution liquid
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United States of America Patent
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Jan 12, 1993
Grant Date -
N/A
app pub date -
Apr 10, 1991
filing date -
Apr 13, 1990
priority date (Note) -
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status (Latency Note)
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Abstract
The invention is directed to an apparatus and method for transforming a sterile pyrogen-free liquid into a substitution liquid using an exchanger. The method includes the steps of flowing first and second liquids over opposite sides of a semipermeable membrane, the first liquid being sterile and pyrogen-free. Both liquids contain at least some electrolytes of blood including at least a buffer agent or a precursor of a buffer agent. At least some of the electrolytes have different concentrations in the two liquids. When purifying blood by hemodiafiltration, this method has the particular advantage that, rather than discarding the second liquid, it can be used for hemodiafiltration.
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