What are the principles for the selection of medical masks？
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1. For general diagnosis and treatment activities, gauze masks or disposable masks can be worn; 2. Wear a medical surgical mask when working in the operating room, nursing patients with immunocompromised function, and performing body cavity puncture operations; 3. Wear medical protective masks when contacting patients with respiratory infectious diseases spread by air or by close contact with droplets.
The protective characteristics of different types of medical masks. Principles for the selection of medical masks
1. For general diagnosis and treatment activities, gauze masks or disposable masks can be worn; 2, surgical masks should be worn when working in the operating room, nursing patients with immunocompromised function, or performing body cavity punctures; 3. When contacting patients with respiratory infectious diseases transmitted through the air or through close contact with droplets, medical protective masks should be worn.
The protective characteristics of different types of medical masks
Gauze masks: protective equipment to protect the respiratory tract from harmful dust, aerosols, microorganisms and dust typhoid. The anti-virus filtering effect is only 20-30%. Gauze masks cannot be used for medical protection, and are only used as ordinary dust masks.
Medical surgical mask: a medical mask worn by medical staff during invasive operations that can prevent the spread of blood, body fluids and splashes. Standard medical surgical masks are divided into 3 layers: the outer layer has a water blocking layer to prevent droplets from entering the mask; the middle layer has a filter layer that can block 90% of 0.3μm particles; the inner layer near the mouth and nose is used for moisture absorption.(Generally, the nose clip structure is on the outer layer of the medical surgical mask)
N95 medical protective masks: N95 masks can prevent infections caused by airborne infectious agents with a diameter of <5μm or close contact with droplet-borne diseases of <1m. N95 medical protective masks can filter 95% of 0.3μm particles and have a barrier effect on viruses.
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