A system for supplying a process medium to medical articles having multiple channels, the system comprising: - a medical processing device configured to receive medical articles to be subjected to a process medium, the medical processing device comprising a plurality of nozzles, each nozzle being movable between a retracted position and an advanced position, - a removable coupling device comprising a plurality of fluid passages, each fluid passage being configured to be connectable to a respective channel of a medical article having multiple channels before the removable coupling device is inserted into the medical processing device, wherein the removable coupling device is configured to be positioned at a docking location inside the medical processing device so that movement of the nozzles from said retracted position to said advanced position causes at least some of said nozzles, in particular all of said nozzles, to become engaged with respective fluid passages of the removable coupling device, thereby enabling the medical processing device to supply the process medium from the nozzles, via the engaged fluid passages of the removable coupling device, into any channel of the medical article connected to the removable coupling device, characterized in that the medical processing device comprises a docking unit, the docking unit comprising a plurality of compartments, one for each nozzle, wherein - in said retracted position, each nozzle is located at least partially inside its respective compartment, in particular fully inside its respective compartment, and - in said advanced position, each nozzle projects out from its respective compartment. - a medical processing device configured to receive medical articles to be subjected to a process medium, the medical processing device comprising a plurality of nozzles, each nozzle being movable between a retracted position and an advanced position, - a removable coupling device comprising a plurality of fluid passages, each fluid passage being configured to be connectable to a respective channel of a medical article having multiple channels before the removable coupling device is inserted into the medical processing device, wherein the removable coupling device is configured to be positioned at a docking location inside the medical processing device so that movement of the nozzles from said retracted position to said advanced position causes at least some of said nozzles, in particular all of said nozzles, to become engaged with respective fluid passages of the removable coupling device, thereby enabling the medical processing device to supply the process medium from the nozzles, via the engaged fluid passages of the removable coupling device, into any channel of the medical article connected to the removable coupling device, characterized in that the medical processing device comprises a docking unit, the docking unit comprising a plurality of compartments, one for each nozzle, wherein - in said retracted position, each nozzle is located at least partially inside its respective compartment, in particular fully inside its respective compartment, and - in said advanced position, each nozzle projects out from its respective compartment. - in said retracted position, each nozzle is located at least partially inside its respective compartment, in particular fully inside its respective compartment, and - in said advanced position, each nozzle projects out from its respective compartment.