Placeholder suitable for medical use

A method for gas-flushing a surface of a medical placeholder comprising the following steps:

• A) expanding a hollow body by feeding a flushing liquid containing oxygen or a flushing gas containing oxygen into an interior space of the hollow body, thereby enlarging the interior space of the hollow body;
• B) delivering gaseous oxygen from the flushing liquid or the flushing gas through a plastics material defining the interior space to the surroundings of the hollow body;
• C) absorbing gaseous carbon dioxide from the surroundings of the hollow body through the plastics material defining the interior space into the flushing liquid or the flushing gas;
• D) passing the flushing liquid or the flushing gas through the interior space of the hollow body;
• and
• E) discharging the flushing liquid or flushing gas out of the interior space.