Question: Consider a hollow-fiber dialyzer with blood flowing through the lumen, and a saline solution is p…

Consider a hollow-fiber dialyzer with blood flowing through the
lumen, and a saline solution is perfused on the outside, operated
in a co-current fashion. Urea and other toxins can diffuse out of
the blood across the membrane and into the dialysate. a. Obtain an
expression for the total amount of urea transferred from the blood
to the dialysate b. Derive an expression for log-mean concentration
difference for urea in the dialyzer. Sketch the concentrations of
urea in blood and the dialysate along the length of the dialyzer
Comparing with blood oxygenator, discuss which of the resistances
will be important for mass transport in the dialyzer.