Question

A positive pressure is applied to the blood compartment or a negative pressure established in the dialysate compartment. This process in dialyses is called ______________

(a) nano filtration

(b) mega filtration

(c) micro filtration

(d) ultra filtration

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This intriguing question originated from Potentiometric Recorder in section Recording System of Biomedical Instrumentation

Answer 1

Right option is (d) ultra filtration

For explanation: The volume of body fluid cannot be controlled by dialysis. Instead, ultra-filtration across the membrane is employed. For this, a positive pressure is applied to the blood compartment or a negative pressure established in the dialysate compartment. Either way, fluid—both water and electrolytes—will move from the blood compartment to the dialysate, which is subsequently discarded.