Patent ID: 7857755

Claim:
A medical instrument for endoscopic interventions having a hollow shaft for receiving at least one medical instrument and having a handle that supports the shaft, which handle contains at least one channel that continues in the hollow shaft, and which handle can be dissolubly secured on the shaft by means of a coupling mechanism, the at least one channel is configured as a flushing and/or suction channel, and, in the area of a coupling spot between the at least one handle-side channel and the hollow shaft, a projecting part and a corresponding recess for inserting the projecting part are configured on the shaft and on the handle, and configured between the at least one handle-side channel and the hollow shaft, there is at least one insulating element via which each projecting part and the respective corresponding recess are connected to each other in a pressure-tight manner, distinguished in that the coupling mechanism is configured as a notching connection with two spring-loaded valve rockers mounted on the shaft, and centering aids for joining the handle and the shaft together in an exact position are formed on the handle and/or on the shaft which centering aids are configured as pins that can be inserted into corresponding recesses on the other respective component to be coupled with, and the length of the pins is such that they already secure the shaft and the handle relatively to one another before shaft and handle are coupled to one another via the coupling mechanism.