Introduction

Medical surgical masks are used as disposable masks worn by clinical medical staff during invasive operations. They can cover the mouth and nose of the user and provide a physical barrier to prevent the direct penetration of pathogenic microorganisms, body fluids, and particles.

The structure and composition of medical surgical masks

It is usually processed from masks, shaped parts, straps and other components, and is generally made of non-woven materials. Isolate by filtering.

Material of medical surgical mask

Medical surgical masks are mainly made of polypropylene. These ultrafine fibers with unique capillary structure increase the number and surface area of fibers per unit area, so that the meltblown cloth has good filtering and shielding properties.

Main technical indicators of medical surgical masks

Medical surgical masks must comply with my country's pharmaceutical industry standard YY 0469-2011 "Technical Requirements for Medical Surgical Masks". The main technical indicators are as follows:

(1) Filtration efficiency: Under the condition of air flow (30±2) L/min, the filtration efficiency of sodium chloride aerosol with aerodynamic median diameter (0.24±0.06) μm is not less than 30%;

(2) Bacterial filtration efficiency: under specified conditions, the filtration efficiency for Staphylococcus aureus ATCC6538 is not less than 95%;

(3) Pressure difference: Under specified conditions, the pressure difference between the two sides of the mask for gas exchange should not be greater than 49Pa;

(4) Synthetic blood penetration: After 2ml of synthetic blood is sprayed on the outside of the mask at a pressure of 16.0kPa (120mmHg), there should be no penetration on the inside of the mask.

The prevention type and application situation of medical surgical masks

It is used to wear on the mouth and nose of medical staff in the operating room to prevent dander and respiratory microorganisms from spreading to the open surgical wounds, and to prevent the body fluids of surgical patients from spreading to medical staff, playing a two-way biological protection role.

The correct way to wear a mask

Wearing a mask correctly is an effective means to block the spread of respiratory secretions. Choosing a medical surgical mask can well prevent the spread of respiratory infectious diseases. The wearing method is as follows:

(1) Wash your hands before wearing the mask, and avoid touching the inner side of the mask with your hands during the process of wearing the mask to reduce the possibility of contamination of the mask;

(2) When wearing, distinguish the inside, outside, top and bottom of the mask. The light-colored side is inside and the dark side is facing out. One end of the metal strip (nose clip) is above the mask, and the folded surface is fully unfolded;

(3) Put the side with the nose clip up, wrap the mouth, nose, and lower jaw, adjust the lower end of the mask to the proper position of the lower jaw, hang the elastic bands on both sides of the ears or tie the straps at both ends behind the head , And then press the nose clip to make the mask fit the face completely.

Precautions

(1) When buying and using medical surgical masks, go to regular hospitals and pharmacies to buy them, and pay attention to the production batch number, production date, and expiration date on the outer packaging of the product. Information such as production license, product registration number, and detailed product instructions;

(2) Please check whether the packaging is intact before use, confirm the external packaging mark, production date, and expiration date, and use it within the sterilization expiration date;

(3) Ensure that the mask covers the bridge of the nose to the lower jaw after unfolding to obtain the expected protective effect;

(4) Disposable medical surgical masks are not allowed to be reused;

(5) If the packaging of medical surgical masks is found to be damaged before use, it is prohibited to use them;

(6) Use with caution if you are allergic to non-woven fabrics;

(7) After use, medical surgical masks should be disposed of according to the requirements of hospitals and environmental protection departments.

Recommendations

Healthy people are not recommended to wear masks in daily life and normal social activities. If you need to be in contact with epidemic patients or stay in densely populated and unventilated places for a long time, you should wear a mask for personal protection.

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