The composition of sodium chloride injection double valve is the same as ordinary sodium chloride injection, but it is superior to single valve in clinical application, which can be analyzed from the following points:1. Sodium chloride injection double valve is used separately in the process of dosing port and input port, avoiding the dosing and infusion of a common mouth, reducing the chance of the input port being contaminated, thus reducing the incidence of infusion reaction.2. Both sides belong to the sealed state before use, and the input It can reduce the disinfection time and the use of bottle mouth stickers.3. The double valve can reduce the insoluble particle pollution during infusion, thus improving the safety of infusion and reducing the probability of infusion reaction. Therefore, sodium chloride double valve is now widely used in the clinic, the operation is simple and easy to implement, in order to ensure the effect at the same time reduce the operation time of health care personnel. Note that whether it is single-valve sodium chloride, or double-valve sodium chloride, in which the sodium chloride composition is the same, the role is the same, only the packaging process is different, and the medical effect of sodium chloride remains unchanged.