Medical surgical mask is a device that can completely cover the nose and mouth when the operator wears it during the operation, which can protect the surgical patients and avoid the operating room personnel from being polluted by microorganisms and body fluids. Medical surgical masks are also used to protect medical personnel from contact with large infectious droplets (diameter > 5um). Medical surgical masks need to be evaluated by standard test procedures, such as water resistance, bacterial filtration, inhalation resistance and flame retardancy. The standard medical surgical mask consists of three layers, the outer layer and the inner layer are non-woven fabrics, and the middle is meltblown cloth. The outer layer blocks body fluids, the middle layer absorbs particles, and the inner layer absorbs water.
Does the medical protective mask have an exhalation valve? Medical protective masks are not allowed to have exhalation valves.
This is because when the medical protective mask is allowed to be used as a surgical mask, if you wear a mask with an exhalation valve, the microorganisms carried in the exhalation will be directly discharged from the mask, posing a threat to the surgical patient. Many industrial protective masks have the design of exhalation valve, but the price of dust mask with exhalation valve is much higher than that without valve.
How do we know if it is a medical mask 1? First of all, let's see if there are any words on the package that show medical surgical masks. Some only display medical masks, but no medical surgical masks.
2. Followed by medical surgical masks, we see that there are two types of medical devices on display. If they are not displayed, they usually don't exist.
Therefore, if the mask we buy has the words "medical surgical mask" and two types of medical devices, it is basically a medical surgical mask.
4 How to distinguish the front and back of medical masks 1? The outer layer of medical surgical masks is divided by color, mostly light blue or dark; The inner layer is mostly white or light.
2. According to the hand feeling, the outer layer is mostly smooth because of its water blocking function; Because the inner layer absorbs moisture, it is more delicate and comfortable to choose materials with good air permeability.
3. According to the position of the nose clip, the layering of the nose clip (metal strip) is generally in the middle and outer layers, and the more prominent side of the plastic strip is usually the outer side. After wearing the mask, the wearer presses the nose clip with both hands to make the mask close to the nose and face, and the nose clip is on the outer layer, which is more convenient for shaping.
4. According to the direction of wrinkles, it is judged that the metal strip (nose clip) is on the top, the lower side of wrinkles is the outside, and the upper side of wrinkles is the inside. The purpose of this design is to avoid liquid retention. When the mask is splashed by blood and body fluids, the splashed water will not accumulate in the folds of the mask.
5. According to the product "trademark", if the product trademark on the mask can be read correctly, that side is the outside.
Need to be reminded that:
1. It is not recommended to use medical surgical masks until the inside and outside of the masks are clearly distinguished, so as not to increase the risk of infection of medical staff.
2. When wearing a mask, pay attention that the mask must be close to the face and cover the nose, mouth and chin.
3. In general, change the mask every 4 hours.
4. When the mask is polluted, it is difficult to breathe, the mask is damaged or deformed, and it can't keep a good fit on the face, it must be replaced immediately.