Our infusion set is a new patent product. It is different from the traditional one because it can prevent the blood back flow from the vessel. The blood backflow preventive disposable infusion set had passed through experimentations for several thousand times with modifications; the researchers had broken through all difficulties in techniques , materials and functional tests as well as through repeated clinical trials in application, finally such a blood backflow preventive, economical and safe disposable infusion set is produced. It has successfully obtained patent. (Chinese patent number is 200620061742.6� �) This certainly is another revolutionary breakthrough in disposable infusion sets.