Dialysis uses a type of semi-permeable membrane, allowing blood loaded with BUN to come in close contact with the dialysis solution. Due to the physical principles of diffusion and convection, the BUN in the blood is transported into the dialysis solution and is thereby removed from the body.
所謂透析，就是利用一種半透膜，讓充滿尿毒素的血液和乾淨的透析液接觸，經由擴散及對流原理，讓血液中的尿毒素轉移到透析液裡，排出體外。