Abstract: A connection device for surgical instruments includes a housing, a head part coupling which is arranged at the housing and is configured for a mechanical coupling of a head part. The head part coupling includes a pin element, which is configured such that the head part can be fixed to the housing in a non-displaceable manner. The pin element is fixed non-detachably to the housing via a weld seam. A surgical instrument includes the connection device and an accessory, which is guided through the head part. A process fixes the connection device with the pin element non-detachably fixed to the housing by a laser welding process.

Abstract: An endoscopic instrument according to the invention includes an elongate tube, which has an axially continuous and substantially cylindrical main lumen for receiving a shaft of an endoscope lens system, and a tool, which is arranged at a distal end of the tube and can be controlled via an elongate transmission element from a proximal end of the tube, wherein the tube has an axially continuous secondary lumen which adjoins the main lumen in a transverse direction, is connected to the main lumen via a narrowed transition area and receives the transmission element. The invention also relates to an endoscopic instrument system.

Abstract: The present application provides an endoscopic device with a shaft which has at least one portion which can be deflected in at least one plane, and having at least one deflection mechanism which is designed for deflecting the deflectable portion and includes, arranged in series, a first connecting link and at least a second connecting link which cooperates with the first connecting link and at least one control element which is coupled to the connecting links to adjust a deflection of the deflectable portion and is connected to an end portion of the shaft. At least part of the control element is arranged in the region of the end portion of the shaft, embodying a loop.

Abstract: An endoscopic instrument according to the invention includes an elongate tube, which has an axially continuous and substantially cylindrical main lumen for receiving a shaft of an endoscope lens system, and a tool, which is arranged at a distal end of the tube and can be controlled via an elongate transmission element from a proximal end of the tube, wherein the tube has an axially continuous secondary lumen which adjoins the main lumen in a transverse direction, is connected to the main lumen via a narrowed transition area and receives the transmission element. The invention also relates to an endoscopic instrument system.

Abstract: An endoscopic instrument according to the invention includes an elongate tube, which has an axially continuous and substantially cylindrical main lumen for receiving a shaft of an endoscope lens system, and a tool, which is arranged at a distal end of the tube and can be controlled via an elongate transmission element from a proximal end of the tube, wherein the tube has an axially continuous secondary lumen which adjoins the main lumen in a transverse direction, is connected to the main lumen via a narrowed transition area and receives the transmission element. The invention also relates to an endoscopic instrument system.

Abstract: An endoscopic instrument according to the invention includes an elongate tube, which has an axially continuous and substantially cylindrical main lumen for receiving a shaft of an endoscope lens system, and a tool, which is arranged at a distal end of the tube and can be controlled via an elongate transmission element from a proximal end of the tube, wherein the tube has an axially continuous secondary lumen which adjoins the main lumen in a transverse direction, is connected to the main lumen via a narrowed transition area and receives the transmission element. The invention also relates to an endoscopic instrument system.