Complex sentence: The method is a closed loop system involving withdrawing blood intravenously from the patient out of the vein, anticoagulant substances are added and after irradiation with ultraviolet (UV)-C rays, the blood is passed back into the body by reinfusion.
Split into simpler sentences: The method is a closed loop system involving withdrawing blood intravenously from the patient out of the vein. Anticoagulant substances are then added and after irradiation with ultraviolet (UV)-C rays, the blood is passed back into the body by reinfusion.