Physical basis of hemodialysis. Hemodialyzer - Medical Physics - MCQs

Determination of serum proteins by blood dialysis

Removing toxins from patient’s blood

investigating brain hemodynamics

Yes, high conductance relates to faster dialysis

Yes, high conductance relates to slower dialysis

There is no correlation between membrane conductance and the rate of dialysis

To check the O2 level in the blood

To check the levels of CO2 in the blood

To prevent gas (air) embolism

Reynolds number Re

Blood viscosity η

Laplace pressure Δp

There are more electrolytes

There are air bubbles

There are less electrolytes

Artificial semipermeable membrane

Organic semipermeable membrane

Impermeable membrane

The same direction

Opposite directions

Blood travels while the dialysate stays still

To force toxic substances from the blood into the dialysate

To prevent backflow of substances from dialysate solution into the blood

To facilitate ultrafiltration (remove excess water out of the blood stream)

Yes, because this way ions will flow back into the blood

Not necessary, because it could can have negative effects on the dialysis

It is necessary, in order not to slow down the dialysis

Movement of solvent through a semipermeable membrane into a region with higher solute concentration

Movement of solute through a semipermeable membrane into a region with higher solvent concentration

Diffusion of water

Water

Semipermeable membrane

Sodium ions