A New Method to Increase the Adsorption of Protein-Bound Toxins in Artificial Liver Support Systems

作者：Ding Weiping^*; Zou Lili; Sun Sijie; Li Weili; Gao Dayong

来源：Artificial Organs, 2014, 38(11): 954-962.

DOI：10.1111/aor.12291

• Artificial liver support system
• Adsorption
• Protein-bound toxin
• Mass transfer
• Bilirubin
• Albumin

In this work, a new method, called the preconcentration method (PCM), is proposed to increase the adsorption of protein-bound toxins onto adsorbents in artificial liver support systems. In the PCM, a concentrator is installed before the inlet of the adsorbent cartridge. This method is validated in an experiment using activated carbon to remove albumin-bound bilirubin, and the mechanism of the increase in adsorption is theoretically explained with breakthrough curve and equilibrium adsorption analyses. Our results show that when this PCM is used, the mass transfer rate of bilirubin from solution to activated carbon is enhanced, the adsorbed bilirubin amount per unit mass of activated carbon is greatly increased, and more albumin-bound bilirubin molecules are quickly removed from the albumin solution. When the concentration ratio (the ratio of the inlet flow rate to the outflow rate of the concentrator) is 2.59, the adsorption efficiency of activated carbon at 120min is increased by approximately 36%. Only approximately 60min is required for the bilirubin concentration to decrease from 19.3 to 13.0mg/dL; however, without the PCM, nearly 180min is needed. In addition, by adjusting the concentration ratio, the adsorption of albumin-bound bilirubin onto activated carbon can be further increased.

• 出版日期2014-11
• 单位中国科学技术大学