Dialysis Modalities · NCLEX Exam

In HD, what is the principal mechanism for removing solutes such as urea from the blood?

  1. Osmotic filtration across the peritoneal membrane in the abdomen
  2. Diffusion across a semipermeable dialyzer membrane
  3. Active transport into dialysate driven by special pumps
  4. Metabolic conversion of urea into a harmless excreted gas
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Correct answer: Diffusion across a semipermeable dialyzer membrane

In HD, blood is pumped through a dialyzer where solutes diffuse across a semipermeable membrane into dialysate to remove wastes.

Difficulty: Easy Question 6 of 20

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