disposable pants:Standard for medical protective clothing

Medical protective clothing has corresponding standards in various countries and regions, but there are differences. At present, the more common international standards are American NFPA standard and European Union en standard. The standard of medical protective clothing in the United States is "nfpa1999:2018" formulated by NFPA (American National Fire Protection Association), which is applicable to medical first aid, while the EU standard is "en14126-2003" formulated by cen (European Standards Committee), which is applicable to the protection of bacteria, blood and microorganisms.

In China, the corresponding standard of medical protective clothing is the national standard of the people's Republic of China GB 19082-2009 technical requirements for medical disposable protective clothing, which has the following main performance indexes:

● structure and appearance

Protective clothing is composed of hooded jacket and trousers, which can be divided into one-piece structure and split structure. The protective clothing shall be dry, clean and free of mildew, and the surface shall be free of adhesion, cracks, holes and other defects; The connecting parts of protective clothing can be processed by needle sewing, bonding or heat sealing. The needle eyes of needle sewing should be sealed. The needle spacing should be 8-14 stitches every 3cm. The stitches should be uniform and straight without skipping stitches; The parts after processing such as bonding or heat sealing shall be flat and sealed without bubbles. The zipper of protective clothing equipped with zipper shall not be exposed, and the puller shall be self-locking. These appearance regulations are to ensure the safety and reliability of protective clothing and prevent small defects from threatening the lives of medical staff.

● liquid barrier function

In terms of water penetration resistance, the hydrostatic pressure of key parts of protective clothing (left and right front flaps, left and right arms and back positions) shall not be less than 1.67kpa (17cmh2o), the synthetic blood penetration resistance of protective clothing shall not be less than 1.75kpa, and the water contamination level on the outer side of protective clothing shall not be less than the requirements of grade 3. These items are to prevent the patient's body fluid, surgical disinfectant or flushing fluid from harming medical staff through protective clothing.

● filtration performance

The filtration efficiency of materials at key parts and joints of protective clothing for non oily particles shall not be less than 70? This index ensures the blocking effect of protective clothing on virus vectors (droplets, micro dust and other particles).

● comfort

The moisture permeability of protective clothing materials shall not be less than 2500g / (M2 · d). This index ensures the normal heat dissipation and perspiration of medical staff and reduces the discomfort caused by wearing for a long time.

● microbial indicators

Coliform, Pseudomonas aeruginosa, Staphylococcus aureus and hemolytic streptococcus shall not be detected in protective clothing. The total number of bacterial colonies shall not be greater than 200 CFU / g and the total number of fungal colonies shall not be greater than 100 CFU / g. This indicator ensures that several disease microorganisms will not adhere to the surface of protective clothing.

● taking function

The breaking strength of materials at key parts of protective clothing shall not be less than 45 n, and the elongation at break shall not be less than 15? The charged quantity shall not be greater than 0.6 μ C / piece, the static attenuation time shall not exceed 0.5s, and the score of primary stimulation shall not exceed 1 point. This index makes the protective clothing meet the basic wearing needs.

● ethylene oxide residue

The residual amount of ethylene oxide in protective clothing sterilized by ethylene oxide shall not exceed 10% μ g/g。 This index specifies the residual amount of bactericide to avoid harm to medical staff.

Among the above seven indicators, the second (liquid barrier function) and the third (filtration performance) are directly related to the protective effect, both of which achieve the purpose of protection by blocking virus transmission. According to news reports, medical staff have been infected in some areas. In order to ensure the effective protection of front-line medical staff during the epidemic, we must do everything possible to fully ensure the supply of protective clothing and other protective articles and escort medical staff. At present, led by the Ministry of finance, local governments have purchased a large number of medical protective clothing in the international market to support front-line medical staff.

The classification standard of protective clothing in China is the people's Republic of China pharmaceutical industry standard YY / T 1499-2016 liquid barrier performance and classification of medical protective clothing, which divides medical protective clothing into four levels. The higher the level, the better the protective performance.

Internationally, the European Union standard en14126-2003 "protective clothing - Performance requirements and test methods of protective clothing against infectious sources" divides protective clothing into six categories, and those marked with "B" are biochemical protective clothing, which can be used for the protection of medical staff; The American Standard nfpa1999:2018 "protective clothing and equipment for emergency medical action" has detailed provisions on protective clothing and equipment, and does not classify medical protective clothing.