The design of the product is according to the physical counter-pressure difference.And the principle of the product is the movement automatically exhances the pressure to squeeze external of the infusion bag.So that the device would import the medical liquid or blood to the patient� body with full hermetic and steady.It would avoid the cross-infection caused by medical liquid with contaminate air enter patient� body. The device with some advantages ,such as rational design、simple operation、light and portable、good practicability.And it is the international patent ,which is autonomous innovation.
