An artificial kidney is a device that removes water and wastes from the blood. In one such device, i.e., the hollow fiber hemodialyzer, blood flows from an artery through the insides of a bundle of cellulose acetate fibers. Dialyzing fluid, which consists of water and various dissolved salts, flows on the outside of the fibers. Water and wastes-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. At some time during the dialysis of a patient in kidney failure, the arterial and venous blood conditions are as follows: Flow rate (mL min-1) Urea concentration (mg mL-1) Arterial Blood-In 200 1.90 Venous Blood-Out 195 1.75 Calculate the rate at which water is being removed from the blood. Your answer should have units of mL/min.

An artificial kidney is a device that removes water and wastes from the blood. In one such device, i.e., the hollow fiber hemodialyzer, blood flows from an artery through the insides of a bundle of cellulose acetate fibers. Dialyzing fluid, which consists of water and various dissolved salts, flows on the outside of the fibers. Water and wastes-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. At some time during the dialysis of a patient in kidney failure, the arterial and venous blood conditions are as follows: Flow rate (mL min-1) Urea concentration (mg mL-1) Arterial Blood-In 200 1.90 Venous Blood-Out 195 1.75 Calculate the rate at which water is being removed from the blood. Your answer should have units of mL/min.