Iodophor is a very common clinical disinfectant. The shelf life of iodophor varies according to whether it is opened or not and whether it is used properly by the patient: i. If the iodophor is unopened, the shelf life is generally about twelve months. Second, if the iodophor has been opened, the shelf life is one month. However, if the patient does not pay attention to the principle of asepsis in the process of use and stuffs the already contaminated swabs or gauze into the remaining iodophor bottle, the remaining iodophor may be completely contaminated, in which case the iodophor will not achieve a good disinfection effect. This shows that it is very important to maintain a good concept of sterility in the process of using opened iodine volts.