Steerable instrument comprising a detachable part

An elongated instrument for connecting to a steering device, the instrument comprising:

• an elongated shaft with a distal end and a proximal end;
• a steering plate located at the proximal end of the shaft, the steering plate movably arranged around a central supporting member rigidly connected around the shaft, the steering plate comprising a coupling for coupling the steering plate to a steering device for controlling movement of the steering plate, the steering plate comprising one or more axially extending protrusions configured for being received by one or more openings in a first portion of a locking plate of the steering device, such that the one or more protrusions can be releasably secured in the one or more openings by securing slots in a second portion of the locking plate by rotating the first portion relative to the second portion or vice versa;
• and
• a plurality of elongated elements extending along the shaft and secured to the steering plate at the proximal end.

A medical device comprising:

• a steering device and an elongated instrument, the steering device and the elongated instrument configured to be connected with one another,
• the steering device comprising:
• a locking plate with a coupling to which a steering plate of the elongated instrument can secure such that the steering plate and the locking plate move together, and
• a steering unit for moving the locking plate,
• wherein the locking plate comprises a first plate and a second plate, the second plate being arranged at a proximal side of the first plate, the first plate having one or more openings for receiving one or more protrusions from the steering plate;
• and the second plate having securing slots which can receive the one or more protrusions once extending from the one or more openings and secure the one or more protrusions each by means of a bayonet fitting;
• and
• the elongated instrument comprising:
• an elongated shaft with a distal end and a proximal ends,
• a steering plate located at the proximal end of the shaft, the steering plate movably arranged around a central supporting member rigidly connected around the shaft, the steering plate comprising a coupling for coupling the steering plate to the steering device for controlling movement of the steering plate, the steering plate comprising one or more axially extending protrusions configured for being received by the one or more openings in the locking plate of the steering device, such that the one or more protrusions can be releasably secured in the one or more openings by the securing slots in the locking plate, and
• a plurality of elongated elements extending along the shaft and secured to the steering plate at the proximal end.