Method for determining a parameter indicative of the progress of an extracorporeal blood treatment
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United States of America Patent
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Feb 10, 2004
Grant Date -
Jun 21, 2001
app pub date -
Dec 1, 2000
filing date -
Dec 2, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A method for continuously determining a parameter (D, Cbin, K, Kt/V) indicative of an extracorporeal blood treatment includes flowing patient's blood and a treatment liquid flow on opposite sides of a semipermeable membrane. The treatment liquid has a characteristic (Cd) associated with the effectiveness of the treatment flow through the exchanger. A succession of variations are caused in the characteristic (Cd) upstream of the exchanger, and a plurality of values (Cdin1 . . . Cdinj . . . Cdinp) of the characteristic (Cd) upstream of the exchanger are continuously stored in memory. Similarly, plurality of values (Cdout1 . . . Cdoutj . . . Cdoutp) adopted by the characteristic (Cd) downstream of the exchanger are continuously stored in memory. From the stored values, the effectiveness of the treatment is calculated using a mathematical model.
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