Abstract
Limitations imposed by the characteristics of some solutes and the structure of dialysis membranes have spurred new interest in the use of mechanisms beyond diffusion and convection for extracorporeal solute removal. Sorbents have been utilized for more than 50 years in extracorporeal blood treatments for specific purposes, and better understanding of their basic aspects may further expand the potential for their clinical application. In this chapter, the basic principles applying to sorbents are discussed, including composition and structure, along with the fundamental mechanisms of solute removal. The critical importance of sorbent biocompatibility is also highlighted. With these basic principles in mind, the clinical application of sorbents is discussed, with an emphasis on the use of hemoperfusion and coupled plasma filtration-adsorption for sepsis-related disorders. Finally, new sorbent-based clinical approaches for acute conditions and end-stage renal disease are presented, emphasizing that sorbent technologies may assume a larger role for a variety of clinical disorders in the future.
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