Medical devices, namely, needle-based and needle-free ozone injection systems for the administration of ozone gas into the body for medical use; ozone medical syringe cartridges sold empty for use in the administration of ozone gas into the body for medical use; ozone generators being an ozone generation chamber inside a disposable single use syringe sold empty for the administration of ozone gas into the body for medical use; medical devices, namely, ozone measuring units for measuring levels of ozone gas in the syringe prior to injection into the body; medical devices, namely, ozone medical syringe docking consoles.