This technique is a kind of developing the new structure of syringe. This devices of technique include a barrel and a plunger. The bottom side of the barrel with an inner nosing. The plunger is pushed forward in the barrel. The plunger has a rod. The rod has one side panel on the top and one side panel on the bottom. Due to the diameter of rod is smaller than the diameter of the side panels. The rod does not contact with the inside of the barrel when the plunger is moved in the barrel. Top of the rod also has an elastic washer. The elastic washer plays the role of stability when the rod is moved in terms of pushed forward in or pull out from the barrel. Due to the diameter of rod is smaller than the diameter of the side panels and the elastic washer plays the role of stability. The rod does not contact with the inside of the barrel when the plunger is moved in the barrel. The inside of the barrel does not be contaminated when the worker manipulates this syringe with single hand.

Based on the sterile concept and principle, this new structure prevents the contact between  the plunger and the barrel during the process of manipulation with single hand.

Medical:
The benefit of the modified syringe are reducing the wastage of the medical syringes and gloves therefore can protect the ear’s environment. The efficiency of the modified syringe can improve the work efficiency. This modified syringe can prevent the patients’ infection, particularly for the patients with immunodeficiency or receiving anticancer therapy. Therefore this modified syringe can save the day of the patients to be hospitalized and save the money.