COVID-19 virus is sensitive to UV light. These disinfection methods have been shown to be effective in cleaning and disinfecting medical equipment surfaces. The following is a summary of the equipment disinfection methods commonly used in COVID-19 treatment.
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1 X-ray imaging diagnostic equipment sterilization
1) Equipment used for diagnosis of COVID-19 patients
Ventilate the machine room 2~3 times a day for not less than 30 min each time.
According to WS/T 367-2012 Technical Specification for Disinfection in Medical Institutions, the surfaces of objects (non-valuable instruments) and floors should be wiped with effective chlorine 400-700 mg/L for 30 min and then wiped with clean water, and the surfaces of X-ray diagnostic equipment should be wiped with 75% ethanol. In occupied conditions, natural ventilation, power ventilation (non-central air conditioning system), or circulating air disinfection machine is used for air disinfection; in unoccupied conditions, UV germicidal lamps or mobile UV lamps are installed evenly according to 1.5 W/m 3 according to the size of the room, and the area inside the machine room is disinfected 1~2 times a day for more than 1 h each time.
- Patients’ reused personal protective equipment (lead bibs, lead aprons, etc.) should be wiped and disinfected with 75% ethanol in time before further use.
- Disinfect the monitor screen, ECG electrode wire, and mouse keyboard with surgical medical
- Disinfect the monitor screen, ECG electrode cable, and mouse keyboard with surgical alcohol.
- In the process of bedside photography using mobile DR in the isolation ward
- During the process of bedside photography with mobile DR in the isolation ward, radiation protection measures should be taken for the adjacent patients. The mobile X-ray machine and lead rubber protective clothing should be wiped and disinfected with 75% ethanol before they are taken out of the isolation ward. The mobile X-ray machine and lead rubber protective clothing should be disinfected with 75% ethanol before being taken out of the isolation room.
2) General treatment equipment
According to WS/T 367-2012 “Technical Specification for Disinfection in Medical Institutions” [4] and WS/T 512_2016 “Management specification for cleaning and disinfection of environmental surfaces in medical institutions [5] Use the recommended disinfection solution to disinfect. Disinfect at least 2 times a day and whenever contamination occurs.
2 Ultrasound mainframe cleaning and UV light disinfection
1) Ultrasound equipment used for diagnosis of COVID-19 patients
(1) Ventilate the room 2~3 times a day, at least 30 min each time; in occupied condition, natural ventilation, power ventilation (non-central air conditioning system), or circulating air disinfection machine can be adopted. (1) Ventilate the room 2~3 times a day for at least 30 min each time. In the unoccupied state, according to the size of the room, according to 1.5 W/m 3 evenly installed UVC germicidal lamp or mobile UVC lamps are installed evenly according to the size of the room, according to 1.5 W/m 3 or mobile UVC lamps, and disinfect the equipment room and waiting area, etc. Disinfect the equipment room and waiting area and other areas where patients stay for a long time 1~2 times a day for more than 1 h each time.
(2) Ultrasound mainframe cleaning: ① The mainframe should be turned off before cleaning and put on protective gloves to avoid cross-infection. (2) Ultrasound mainframe cleaning: ① Turn off the machine before cleaning and put on protective gloves to avoid cross-infection; ② Dry with a clean soft cloth after cleaning. ③ host shell support with neutral soapy water wipe clean (use a soft cloth soaked and wrung (3) Ultrasound host disinfection
(3) Ultrasonic host disinfection: ① The control surface of desktop host and portable host (3) Ultrasonic mainframe disinfection: ① Control panel and monitor of desktop mainframe and portable mainframe are disinfected with 75% alcohol or 70% isopropyl alcohol under protective film conditions. Isopropyl alcohol wipes disinfection, preferably with a wet cloth, or spray the disinfectant on medical (humidity close to wet wipes is better) to prevent the disinfection reagent from flowing into the control panel gap. ② The flat panel ultrasound shell and monitor support 75% medical alcohol, 3% hydrogen peroxide, 0.5% hydrogen peroxide, and 0.5% hydrogen peroxide. 3% hydrogen peroxide, 0.5% sodium hypochlorite disinfectant wipe disinfection; ③ Ultrasound machine Support low-frequency UV disinfection (within 1 time per week); ④ Prohibit the use of quaternary (4) Ultrasound probe cleaning and disinfection
(4) Ultrasound probe cleaning and disinfection: ① Recommend using neutral cleaning agent containing enzymes (4) Ultrasound probe cleaning and disinfection: ① Recommend the use of neutral cleanser containing enzymes for cleaning (2) Recommend the use of disinfectant containing quaternary ammonium salts or hydrogen peroxide to wipe and disinfect the probe in contact with the body surface. ③ Intracavitary probes are recommended to be disinfected by immersion in disinfectants containing glutaraldehyde or hydrogen peroxide.
2) General ultrasonic diagnosis and treatment equipment
According to WS/T 367-2012 Technical Specification for Disinfection in Medical Institutions and WS/T 512_2016 Management specification for environmental surface cleaning and disinfection in medical institutions Use the recommended disinfection solution to disinfect. Disinfect at least twice a day, and disinfect at any time in case of contamination.
3 Monitor and accessories cleaning and disinfection
1) Equipment used for diagnosis of newly crowned patients
(1) Mainframe cleaning and disinfection: ① Turn off the monitor and disconnect the AC power supply, put on protective gloves to avoid cross-infection; ② Wipe the surface of the machine display, mainframe, and module with 75% ethanol, paying attention to avoid the metal interface parts of the equipment; ③ Place the monitor under UV germicidal lamp or mobile UV lamp irradiation, disinfect the machine used for patient diagnosis and treatment 1-2 times a day, for 1 h each time. above.
(2) Accessory cleaning and disinfection: use 75% ethanol to wipe the lead wires of ECG, blood oxygen sensor, and temperature probe. (2) Cleaning and disinfection of accessories: use 75% ethanol to wipe the sensor position and cable surface of ECG lead wire, blood oxygen sensor, and temperature probe; ② use Use a cotton swab to absorb the appropriate amount of alcohol to thoroughly wipe the patient contact of the sensor until
③ Wipe the blood pressure trachea and tracheal extension tube with 75% ethanol The reusable cuff is first removed from the airbag and wiped with 75% ethanol. ⑤ Reusable cuffs can be cleaned with a cleaning solution Hand wash; ⑥ Place the accessory in a ventilated, cool place for at least 30 minutes to allow for thorough (6) Place the accessories in a ventilated and cool place for at least 30 minutes for thorough air drying.
2) General medical equipment
According to WS/T 367-2012 “Technical Specification for Disinfection of Medical Institutions” and WS/T 512_2016《Management specification for environmental surface cleaning and disinfection in medical institution.
4 Ventilator and accessories cleaning and disinfection
1) Equipment used for diagnosis of newly crowned patients
(1) Ventilate the room 2~3 times a day, at least 30 min each time; natural ventilation, power ventilation (non-central air conditioning system), or circulating air disinfection machine can be used for air disinfection; under unoccupied conditions, according to the size of the room, install UV germicidal lamp or mobile UV lamp evenly according to 1.5 W/m 3 to disinfect the equipment room area 1~2 times a day, for more than 1 h each time.
(2) For patients with special infections (such as coronavirus, influenza, etc.) It is recommended to use a disposable breathing circuit, disposable exhalation valve, and flow sensor that Each person should be replaced every time. A disposable bacterial filter must be installed at the inhalation and exhalation ends. The disposable bacterial filter must be installed at the inhalation and exhalation ends and replaced promptly in case of increased expiratory resistance and fluid accumulation.
5 Discussion
In summary, treatment at 56°C for 30 min with ether, 75% ethanol, chlorine-containing disinfectants, peroxyacetic acid, and chloroform are effective in the inactivation of NIV. Therefore, these disinfection methods can be used for cleaning and disinfecting the surfaces of medical devices. good results [7]. To strengthen the supervision of cleaning and disinfection of commonly used medical equipment surfaces in the COVID-19 epidemic The supervision of cleaning and disinfection of the surfaces of medical equipment commonly used in the COVID-19 epidemic needs to be assigned to a specific person, who is responsible for the cleaning and disinfection. The training of medical staff and equipment engineering staff on cleaning and disinfection methods and procedures should be strengthened to improve The training of medical staff and equipment engineering staff on cleaning and disinfection methods and procedures should be strengthened to improve the compliance of cleaning and disinfection.
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