is a procedure that patients who have limited or virtually non-existent kidney f
ID: 475635 • Letter: I
Question
is a procedure that patients who have limited or virtually non-existent kidney function Pa undergo to remove both waste products and extra fluid from their bloodstream. from an artery of a aqueous salt solution is into an artificial the blood enters numerous notably urea and excess fluid called fluid around t Waste products, most biood returns to the within the blood pass through the fibers and into the dialysis fluid. The purified bloodstream through a vein. the flow the below. After a certain amount of tme in dialysis treatment, rates and concentrations are as follows. 640.0 mt/min Dialysis fluid 318.0 mL/min Blood from an artery 312.0 mL/min Blood to a vein 1.304 mg Urea/mL 1.430 mg Urea/mL Artificial Kidney Waste dialysis fluid Scroll down for more questions. What is the rate of urea removal from the blood stream? Number mg urea minExplanation / Answer
a)
Blood inlet in artery is 318mL/min of which urea is 1.43 mg /mL
Urea in = 318*1.43 = 454.74 mg/min
blood outlet in artery is 312mL/min of which urea is 1.304 mg/mL
Urea out = 312*1.304 = 406.848 mg/min
Urea removal rate = Urea in - Urea out = 47.892 mg/min
b) Urea removed from blood stream is purged out through waste dialysis fluid
waste dialysis fluid = 640 mL/min
Concentration of urea in waste dialysis fluid is 47.892/640 = 0.075 mg Urea/mL waste dialysis fluid
c)safe limit for normal patient is 350mL/hr = 350/60 = 5.83 mL/min
Fluid removed blood = 318 - 312 = 6 mL/min
for one hour 60*6 = 360 mL fluid/min
d) Fluid removed from blood = 6mL / min
for 3.95 hours = 3.95*60 mins = 237 mins
fluid removed = 237 * 6 = 1422 mL
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