Medical instrument for manipulation of an uterus

1. 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.

2. The medical instrument of claim 1 , wherein said locking element locks automatically into said locking sites.

3. The medical instrument of claim 1 , wherein said locking sites are designed as recesses in said rod-shaped body.

4. The medical instrument of claim 1 , wherein said locking element is designed as a spring-loaded catch.

5. The medical instrument of claim 1 , wherein said locking mechanism has an actuating element for releasing said locking element arranged on said bell-shaped element.

6. The medical instrument of claim 5 , wherein said actuating element is a push-button.

7. The medical instrument of claim 1 , wherein said bell-shaped element has a cylindrical portion at a distal end thereof.

8. The medical instrument of claim 1 , wherein said bell-shaped element is closed at its proximal end.

9. The medical instrument of claim 1 , wherein distally projecting fixing elements are arranged on said bell-shaped element.

10. The medical instrument of claim 9 , wherein said fixing elements are designed as pins.

11. The medical instrument of claim 10 , wherein said pins protrude from an inner phase of said bell-shaped element.

12. The medical instrument of claim 1 , wherein said bell-shaped element is made of a ceramic material.

13. The medical instrument of claim 1 , wherein said rod-shaped body is bent at said distal end section.

14. The medical instrument of claim 1 , wherein said bell-shaped element is provided with rollers via which said bell-shaped element can be slidingly displaced along said rod-shaped body.