Figure 36

Comparison of urea clearance rates between low- and high-efficiency hemodialyzers (urea KoA = 500 and 1000 mL/min, respectively). The urea clearance rate increases with the blood flow rate and gradually reaches a plateau for both types of dialyzers. The plateau value of KoA is higher for the high-efficiency dialyzer. At low blood flow rates (<200 mL/min), however, the capacity of the high-efficiency dialyzer cannot be exploited and the clearance rate is similar to that of the low-flux dialyzer [3,6]. Ko—mass transfer coefficient; A—surface area. (From Collins [6]; with permission.)

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