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The dialysis circuit is composed of a dialyzer with a semipermeable membrane, replacement fluid or dialysate (dialysis solution), sterile tubing for the transport of blood and dialysate, and a machine to power and monitor the procedure using sensors and alarms. A continuous venovenous hemofiltration (CVVH) circuit contains the same components, except that dialysate is not used. UF = ultrafiltration.
