Surgical or medical instruments for the placement or installation of catheters; medical devices, namely, filters and membranes used as filters for body fluids; blood filters; blood membranes used as filters; intravenous or intra-arterial fluid filters and membranes used as filters; blood purification filters and membranes used as filters; filters and membranes as parts of installations for the purification of liquid media, in particular blood and blood components, devices for introduction int...