Patent ID: 8475469

Claim:
A medical instrument, comprising a rod-shaped body having a distal end section, said distal end section can be inserted through a vagina into an uterus, a bell-shaped element mounted on said rod-shaped body, said bell-shaped element being slidingly displaceable along said rod-shaped body at least between a first axial position on said rod-shaped body close to a proximal end of said rod-shaped body and up to a subsequent axial position at said distal end portion inserted into a uterus, a sliding displacement of said bell-shaped element being without rotating said rod-shaped body and said bell-shaped element relative to each other; wherein said bell-shaped element can be locked by means of a locking mechanism in different axial positions on said rod-shaped body, said locking mechanism locks said bell-shaped element against a displacement of said bell-shaped element along said rod-shaped body, wherein said locking mechanism has a locking element being arranged on said bell-shaped element, said locking element, in said different axial positions, engages in a locking site on said rod-shaped body, and wherein a first locking site is arranged at a proximal end portion of said rod-shaped body and a second locking site is arranged at said distal end portion of said rod-shaped body.