| 摘要 |
<p>The invention relates to an insertion instrument for joint sockets of prostheses, comprising an elongate shaft (1), a suction head (2) being provided at the front end thereof for connection to a joint socket, a suction device with a piston guided in the shaft (1), a suction duct merging into the suction head and an actuating element which is guided along a guiding track (14) on the shaft (1). According to the invention, the guiding track (14) is helically formed and comprises a locking device, preferably in the form of a recess (15), for the actuating element in a suction position. Due to the helical form of the guiding track, the actuating element executes a rotational and longitudinal movement during its displacement. The longitudinal movement produces a negative pressure in the suction duct, thereby ensuring the maintenance of said pressure, while the rotating movement causes the rotation of the actuating element to an extent that it reaches its locking position at the end of the guiding track. The handling of the instrument is thus simplified.</p> |
