A sterile, sealed container (cartridge) that is placed into a supersaturated oxygen (SSO2) therapy system for the mixing of autologous blood with an SSO2 solution [typically created in the container with oxygen (O2) and saline], to produce oxygen-enriched hyperoxaemic blood that is delivered (infused) to the patient by means of a dedicated catheter that connects to this cartridge. It is typically made of plastic and silicone materials, has several chambers, and is connected to the system's O2 gas source. This is a single-use device.