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Source:

Nursing2015

November 2009, Volume 39 Number 11 , p 55 - 56

Author

  • Rick Jepson RN

Abstract


BASED ON CONCENTRATION gradients across a semipermeable membrane, hemodialysis replaces two of the major functions of failing kidneys: removing excess fluid from the body and cleaning the blood by removing excess electrolytes and metabolic waste. If, for example, the concentration of a small molecular weight solute such as creatinine is higher on one side of the membrane than on the other, the solute will diffuse across the membrane from an area of higher concentration to an area of lower concentration. Similarly, if fluid pressure is higher on one side of the membrane than on the other, fluid will flow across the membrane from an area ...

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