An artificial kidney is a device that removes water and waste metabolites from blood. In one such device, the hollow fiber hemodialyzer, blood flow's from an artery through the insides of a bundle
of hollow' cellulose acetate fibers, and dialyzing fluid, which consists of water and various dissolved salts, flows on the outside of the fibers. Water and waste metabolites—principally urea, creatinine, uric acid, and phosphate ions—pass through the fiber walls into the dialyzing fluid, and the purified blood is returned to a vein.
Dialysate
At some time during a dialysis the arterial and venous blood conditions are as follows:
Arterial (entering) Blood Venous (exiting) Blood
Flow Rate | 200.0 mL/min | 195.0 mL/min |
Urea (H2NCONH2) Concentration | 1.90 mg/mL | 1.75 mg/mL |
- Calculate the rates at w hich urea and water are being removed from the blood.
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