Catheters; Air cushions for medical purposes; Apparatus for artificial respiration; Appliances for washing body cavities; Blood testing apparatus, namely, blood collecting tubes; Cannulae; Dialysis machines; Dialyzers; Drainage tubes for medical purposes; Enema apparatus for medical purposes; Medical apparatus and instruments for use in surgery; Medical apparatus and instruments for use in dialysis procedures; Needles for medical use; Syringes for medical purposes; Tubes for enteral feeding