Reprocessing apparatus and method for operating a reprocessing apparatus for cleaning and/or disinfecting a medical instrument

A reprocessing apparatus for cleaning and/or disinfecting a medical instrument, the reprocessing apparatus comprising:

• a fluid container for a reprocessing fluid;
• and
• a reprocessing device, wherein the reprocessing device comprises:
• a reprocessing space in which the medical instrument is introduced for reprocessing;
• a fluid line for connection to at least one channel of the medical instrument, wherein the fluid line is configured to transport the reprocessing fluid to the at least one channel;
• a pump configured to introduce gas bubbles into the fluid line;
• a gas bubble speed determining apparatus comprising a camera, the camera being configured to capture successive images of at least a portion of the gas bubbles in the fluid line;
• and
• a controller comprising hardware, the controller being configured to determine a speed of the gas bubbles in the fluid line from the successive images.