Medical apparatuses and instruments for extracorporeal blood treatment, medical apparatuses and instruments for the treatment of kidney failure, apparatuses and instruments for therapeutic plasma exchange; hemodialysis machines, hemofiltration machines, hemodiafiltration machines; hemodialyzers, hemofilters, plasma filters, filters for hemodialysis liquid, filters for substitution liquid for hemofiltration, for hemodiafiltration, for therapeutic plasma exchange; membranes for hemodialyzers, membranes for hemofilters, membranes for plasma filters, membranes for filtering liquids for medical use, namely hemodialysis liquids, substitution liquids for hemofiltration, for hemodiafiltration, for therapeutic plasma exchange