Medical instruments and apparatus, in particular syringes for medical purposes, needles for medical purposes, guide wires for medical purposes, probes for medical purposes, tubes for medical purposes, pressure connectors for medical purposes, neck valves for medical purposes, pressure valves for medical purposes, screw-cap pressure valves for medical purposes, drainage tubes for medical purposes, secretion bags 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 vessel implants (stents) for medical purposes; dilators for medical purposes; application instruments for medical purposes; introduction locks for medical purposes; apparatus for breaking up kidney stones; sterile cloths (covering cloths for medical purposes); suture materials; instruments for the insertion of implants for medical purposes