Medical apparatus and instruments, in particular syringes for medical purposes, needles for medical purposes, guidewires for medical purposes, probes for medical purposes, tubes for medical purposes, pressure connections for medical purposes, collar valves for medical purposes, pressure valves for medical purposes, pressure valves with plug screw caps, for medical purposes, drainage systems for medical purposes, bags for collecting secretions for medical purposes, disposable medical products, included in this class; catheters and catheter systems, included in this class; balloon catheters; surgical implants (made of artificial materials), in particular arterial implants (stents) for medical purposes; dilators for medical purposes, instruments for fitting, for medical purposes, introduction valves for medical purposes, apparatus for breaking up kidney stones, sterile cloths (fields for medical purposes), suture materials, instruments for inserting implants, for medical purposes