Figure P4.1.4 is a sketch of an artificial kidney, a medica device used to remov

Question

Figure P4.1.4 is a sketch of an artificial kidney, a medica device used to remove waste metabolites from the blood in cases of kidney malfunction. The dialying fliud passes across a hollow membrane, and the waste products diffuse from the blood into the dialyzing fluid. If the blood entering the unit flows at the rate of 220 mL/ min and the blood existing the units flows at the rate of 215mL/ min, how much water and urea (the main waste product) pass into the dialysate if the entering concentration of urea is 2.30 mg/mL and the exit concentration of urea is 1.70mg/ mL? If the dialyzing fliud flows into the unit at the rate of 1500 mL/ min, what is the concentration of the urea in the dialysate? Figure P4.1.4 is a sketch of an artificial kidney, a medica device used to remove waste metabolites from the blood in cases of kidney malfunction. The dialying fliud passes across a hollow membrane, and the waste products diffuse from the blood into the dialyzing fluid. If the blood entering the unit flows at the rate of 220 mL/ min and the blood existing the units flows at the rate of 215mL/ min, how much water and urea (the main waste product) pass into the dialysate if the entering concentration of urea is 2.30 mg/mL and the exit concentration of urea is 1.70mg/ mL? If the dialyzing fliud flows into the unit at the rate of 1500 mL/ min, what is the concentration of the urea in the dialysate? Figure P4.1.4 is a sketch of an artificial kidney, a medica device used to remove waste metabolites from the blood in cases of kidney malfunction. The dialying fliud passes across a hollow membrane, and the waste products diffuse from the blood into the dialyzing fluid. If the blood entering the unit flows at the rate of 220 mL/ min and the blood existing the units flows at the rate of 215mL/ min, how much water and urea (the main waste product) pass into the dialysate if the entering concentration of urea is 2.30 mg/mL and the exit concentration of urea is 1.70mg/ mL? If the dialyzing fliud flows into the unit at the rate of 1500 mL/ min, what is the concentration of the urea in the dialysate?

Explanation / Answer

Entering unit flow of blood = 220 ml/min

Entering concentration of urea = 2.30 mg/ml

i.e 1ml contains 2.30 mg

    220 ml contains = 220 * 2.30 / 1

                           = 506 mg

Exsiting flow rate = 215 ml/min

Exit concentration of urea = 1.70 mg/ml

i.e 1 ml contains 1.70 mg

   215 ml contains = 215 * 1.70 / 1

                           = 365.5 mg

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