UV sterilizer

UV sterilizer is a kind of low-energy electromagnetic wave. Because of its good sterilization effect, it is widely used in medical, sanitation and epidemic prevention, food industry, pharmaceutical industry and other sectors. However, how to use the ultraviolet lamp correctly to ensure its sterilization effect, extend the service life of the lamp tube, and avoid accidental injury is required for every operator to master first, and now I will talk about the experience of using it in the past few years.

1 UV disinfection principle

Using ultraviolet radiation, the bacterial protein is photolyzed and denatured, and the amino acid, nucleic acid and enzyme of the bacterial body are destroyed and died. At the same time, when ultraviolet rays pass through the air, the oxygen in the air is ionized to produce ozone, which strengthens the sterilization effect.

2Ultraviolet disinfection method

Ultraviolet rays are mostly used for disinfection of air and object surfaces, with a wavelength of 2573A. Used for air disinfection, the effective distance does not exceed Zm, the irradiation time is 30-60min, for the disinfection of items, the effective distance is 25-60cm, the irradiation time is 20-30min, and the timer starts from the light on 5-7min (the light needs to be preheated for a certain time, In order to ionize the oxygen in the air to produce ozone).

3 UV disinfection measures

3.1 Since we all use ultraviolet radiation for air disinfection, we must first ensure that the lamp is intact and used correctly, and at the same time, the lamp must be monitored regularly. The intensity of the ultraviolet lamp is less than 70uwc/lining should be replaced in time . The lamp should be kept clean. The surface of the lamp tube should be lightly tested with an alcohol cotton ball every 1 to 2 weeks to remove dust and grease to reduce the factors that affect the penetration of ultraviolet rays.

3.2 The lamp should be handled with care. Turning on the lamp immediately after turning off the lamp will reduce the lamp life. It should be cooled for 3-4 minutes and then turned on. It can be used continuously for 4 hours, but ventilation and heat dissipation should be good to maintain the life of the lamp.

3.3 The treatment room should be kept clean and dry at all times, and the treatment room should be wiped with a special cloth soaked in disinfectant every day. Mop the floor with a special mop.

3.4 Regulate the daily monitoring and registration items of ultraviolet lamps. It must be registered in separate rooms and lamps. The registration book includes the lamp activation date, daily disinfection time, cumulative time, performer's signature, and intensity monitoring registration. It is required to record carefully after disinfection, so that The execution is consistent with the record.

3.5 Use an ultraviolet intensity indicator card or an intensity monitor to measure the intensity of the lamp first to ensure that the intensity of the new lamp is 100. Above w/c lining. After replacing the new lamp, the use time of the mold meter restarts to count. After the cumulative use time of the lamp reaches 1000h, contact the professional staff of hospital infection monitoring in time to monitor the radiation intensity of the lamp. If it is qualified, continue to use it and replace it if it is not qualified. Lamp tube to ensure the disinfection effect of the ultraviolet lamp.

3.6 When air disinfection, open all cabinet doors and drawers. In order to ensure that all spaces in the treatment room are fully exposed, they are all irradiated by ultraviolet rays, and there are no dead ends when disinfection.

3.7 Strengthen management and supervision of some outpatient clinics, laboratories and other departments. It is recommended to install ultraviolet light timer switches in the outpatient department, which can prevent the waste of power and the effective life of the lamps due to negligence and forgetting to turn off the lights.

3.8 The staff should make work arrangements before ultraviolet disinfection to avoid walking in the sterilization process, which will affect the disinfection effect and receive unnecessary exposure; when the monitoring nurse monitors the intensity of the lamp, due to the large number of lamps, When monitoring, you must wear protective glasses and protective clothing; in the ward with ultraviolet lamps, the switch of the ultraviolet lamp must be separated from other ordinary lamps or be marked, and the patient and family members must be explained to the patient and family members not to turn on the ultraviolet light at will Lights, so as not to cause bad consequences.