Misunderstandings in the use of surgical masks for Jianwei medical instruments

Medical medical masks must comply with YY 0469-2004 technical requirements for medical medical masks. The important technical objectives include filtration efficiency, bacterial filtration efficiency and respiratory resistance

1. Filtration efficiency: under the condition of air flow rate (30 ± 2) l / min, the filtration efficiency of sodium chloride aerosol with aerodynamic median diameter of (0.24 ± 0.06) μ m should not be less than 30%;

2. Bacterial filtration efficiency: under regular conditions, the filtration efficiency of Staphylococcus aureus aerosol with uniform particle diameter of (3 ± 0.3) μ m is no less than 95%;

3. Respiratory resistance: under the condition of filtration efficiency flow, the inspiratory resistance does not exceed 49 PA and the expiratory resistance does not exceed 29.4 PA.

Pay attention!!

Chinese medical mask can not be used as ear protection operation!!!

Ni Xiaoping, director of the courseware "the use of masks in medical institutions and rare misunderstandings" on page 4 describes the concept of medical masks in detail.

Reason: medical surgery takes a long time, and the task personnel need to stop the necessary verbal communication during the operation. In order to avoid the "sunset scene" (the droplets caused by the operator's talking, coughing, etc. fall in the surgical field along the lower edge of the mask, if you use the lighting, you can see the phenomenon of sunset). To increase the infection related to the operation site, the medical mask must choose the frenulum type, and should not knot in the mandible (if the knot is tied to the mandible, it is easy to purify the neckline part when wearing the operating clothes and during the operation). The two frenulums should be distinguished and knotted at the neck and the back of the head. At the end of wearing the mask, ensure that the nose clip is molded and the lower part of the mask should closely fit the mandible.