人工肾血液透析过程中反渗透现象及其临界尺度的研究

Study on the Critical Length for Backfiltration in Hemodialyzers

建立了一个能够初步描述人工肾血液—透析器流场的数学模型。用数值计算的方法模拟了透析器中的流体流动 ,并在实际的流动参数和物性参数范围内 ,对可能出现的反渗透现象作了研究和分析。计算结果表明 ,反渗透出现在血液流动的后期 ,且反渗透出现的临界尺度和流场的流动参数以及膜的物性参数之间存在着一定的关系。此外 ,还研究了反渗透对血液浓度的影响。

Using a simple mathematical model,the backfiltration phenomena in hemodialyzers are studied.Numerical simulations show that backfiltration may occur in the hemodialysis process.We investigate the relations between the critical length for the backfiltration of the flow conditions,and the transport parameters of membrane.The effects of backfiltration on the concentrations of blood are also studied.