UV disinfection lamp disinfection time is generally 30-60 minutes, and it is recommended to enter the room 30 minutes after the end of disinfection to reduce the damage to the body. UV disinfection lamps mainly penetrate the cell membranes of microorganisms through UV irradiation and destroy their DNA structure, thus causing the immediate death of the germs and achieving the purpose of disinfection and sterilization. When using UV disinfection, the patient should make the disinfected parts subject to direct, full exposure to UV light, irradiation time is generally 30-60 minutes, otherwise the sterilization effect is not good, can not achieve the purpose of disinfection. When irradiating with UV light, people must leave the room to avoid damage to the human skin barrier, and even the possibility of cancer, and can also produce some harm to the eyes. In addition, disinfection is not immediately after the completion of the room, should be fully ventilated to minimize the ozone stimulation caused by UV lamp irradiation.