Abstract: A tracker, a surgical tool system, a surgical navigation system, and a method for operating a surgical navigation system are provided. The tracker is configured to be associated with a patient or a surgical tool that is to be tracked by the surgical navigation system. The tracker comprises an optical fibre having a longitudinal extension and configured to be optically coupled to a light source such that the optical fibre transmits light emitted by the light source. The optical fibre has a lateral surface along its longitudinal extension and is configured to emit light via at least a portion of the lateral surface.

Abstract: In a connector for a fluid line having a connector housing which has a fluid duct extending away from a first opening, a locking device having a locking housing and a locking element is provided in the region of the first opening. The locking housing encloses the connector housing with respect to the fluid duct such that an annular gap which is intended for receiving a substantially cylindrical connection piece is formed between the connector housing and the locking housing. The locking housing has a cutout through which the locking element projects into the annular gap by way of a respective holding portion.

Abstract: In a connector for a fluid line having a connector housing which has a fluid duct extending away from a first opening, a locking device having a locking housing and a locking element is provided in the region of the first opening. The locking housing encloses the connector housing with respect to the fluid duct such that an annular gap which is intended for receiving a substantially cylindrical connection piece is formed between the connector housing and the locking housing. The locking housing has a cutout through which the locking element projects into the annular gap by way of a respective holding portion.