Method for filling pressurized gas cartridges for medical use

A method for filling a cartridge with compressed, medical grade gas, comprising:

• introducing an uncapped and empty cartridge;
• the cartridge comprising an open end, into a support means;
• sealing the open end of the cartridge against an evacuation adaptor, and producing at least a partial vacuum within the cartridge;
• sealing the open end of the cartridge against a filling adaptor, and filling the cartridge with compressed, medical grade gas at a predetermined pressure and temperature;
• introducing the filled cartridge to a capping device, and firmly attaching a cap to the open end of the cartridge;
• and
• introducing the capped cartridge to a welding device and permanently attaching the cap to the cartridge with a weld.