Figure 68

Dialysate flow rate in hemodialysis. The clearance of urea also is influenced by the dialysate flow rate. Increased flow rates help maximize the urea concentration gradient along the entire length of the dialysis membrane. Increasing the dialysate flow rate from 500 to 800 mL/min can be expected to increase the urea clearance rate on the order of 10% to 15%. This effect is most pronounced at high blood flow rates and with use of high KoA dialyzers. KoA— constant indicating the efficiency of the dialyzer in removing urea; Qd—dialysate flow rate.

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