Practical Issues in Anesthesia and Intensive Care 2013 by Biagio Allaria

Author:Biagio Allaria
Language: eng
Format: epub
Publisher: Springer Milan, Milano

8.1 CRRT: An Overview of the Different Techniques

Dialysis circuit consists of : (1) the blood circuit; (2) the dialysate circuit. The core of dialysis process is the filter, where a semipermeable membrane separates the blood and dialysate compartments. Dialysis membrane rules the exchanges of water and solutes between blood and dialysate compartments driven by diffusive and convective fluxes (Fig. 8.1).

Fig. 8.1The filter of dialysis

The different dialytic methodologies differ in a different assembly of the components, that is in a increasing degrees of technical complexity. They ranges from SCUF, in which there is a loss of water and solutes by exclusive convective motion without replacement liquid infusion, to continuous hemodiafiltration (CVVHDF) in which there are an exchange of solutes with both convective and diffusive motions, and a replacement liquid infusion.

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