10 Medical apparatus and instruments for collecting blood components and for treating blood; medical apparatus and instruments, namely, dialysis machines, haemodialysers, haemofiltration units, tubing for extracorporeal systems, blood pumps, cannulas, catheters, pumps for anti-coagulant, sets of tubing for priming extracorporeal systems, drip chambers, bubble traps, pressure sensors, flow-meters, thermometers, conductivity meters, apparatus for measuring ion density, heat exchangers, heating and cooling devices, connectors for medical purposes, devices for measuring urea and other substances in the blood, apparatus for the preparation of dialysis fluid and other medical fluids, apparatus for preparing substitution fluid, disinfectant solution, cleaning solution, descaling solution, apparatus for treating water for medical use, apparatus for treating water by reverse osmosis for medical use, blood treatment apparatus adapted for treating bone marrow, for treating cells, for apheresis, for blood separation and filtration, for therapeutic blood treatment, as well as the corresponding accessories, namely, bags, pouches, cartridges, rigid and semi-rigid containers for concentrates in solid or liquid form for medical use; bags, pouches, cartridges, rigid and semi-rigid containers for solutions for medical use, and for liquids for peritoneal dialysis; hollow fiber and fiber media membranes for medical use, namely, hollow fiber membranes for haemodialysis, haemofiltration and haemodiafiltration