A quick reference guide to haemofiltration and renal failure March ...
A quick reference guide to haemofiltration and renal failure March ...
A quick reference guide to haemofiltration and renal failure March ...
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CVVHDF<br />
Continuous Veno-Venous Haemodiafiltration<br />
In this type of CRRT, a slow countercurrent dialysate flow is<br />
added <strong>to</strong> the haemofilter. Solute removal is both diffusive <strong>and</strong><br />
convective, <strong>and</strong> is thought <strong>to</strong> be the most effective method of<br />
removal of wastes in CRRT. (Bellomo, Ronco <strong>and</strong> Mehta, 1996:S4)<br />
Fluid replacement is routinely added, as clinically indicated, <strong>to</strong><br />
maintain desired fluid balance. This is due <strong>to</strong> the ultrafiltration<br />
rate being greater than the desired patient fluid loss.<br />
(Bellomo, Ronco <strong>and</strong> Mehta, 1996:S4)<br />
V + pump V<br />
Dialysate out Dialysate In<br />
+ UF<br />
V – vein, R – replacement fluid, UF – ultrafiltrate<br />
R<br />
12
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