Patent ID: 8708943

Claim:
A hemo(dia)filtration apparatus comprising: an extracorporeal blood circuit having an arterial line and a venous line; a supply line of replacement fluid for the extracorporeal blood circuit, said supply line having a bifurcation which divides a main branch into a pre-dilution branch fluidly connected to the arterial line and a post-dilution branch fluidly connected to the venous line; a pump tube tract predisposed in said supply line for coupling with a pump for circulation of the replacement fluid, said pump tube tract being conformed as an open ring with an aspiration end and a delivery end, the aspiration end having a location, the delivery end having a location; an expansion chamber having a location and being predisposed in said extracorporeal blood circuit; one of said pre-dilution branch and said post-dilution branch leading to said expansion chamber; the location of the aspiration end and the location of the delivery end being rigidly fixed with respect to the location of the expansion chamber, said expansion chamber bearing said pump tract; and a support element to which said supply line is constrained such that said pre-dilution branch and said post-dilution branch are located in a pre-determined position with respect to each other and with respect to the location of said expansion chamber, the pre-dilution branch and the post-dilution branch being immobile with respect to said support element, said support element comprising one or more extensions rigidly connected to and integrally formed in a single piece with said expansion chamber, wherein said pre-dilution branch and said post-dilution branch each comprise at least a squeezable tract of tube, said squeezeble tract of tube being positioned in a pre-fixed postion with respect to the location of said expansion chamber.