How to choose the right respiratory protective equipment?
Fit test with two kinds of qualitative and quantitative, qualitative method is simple, suitable for on-site inspection using closed type mask for each staff, this service can be provided by the respiratory protective equipment producers or sellers, or by the employing unit self inspection. Quantitative suitability tests are better suited for full coverage of IDLH environments, or for scientific research.Because of the applicability of the new inspection methods, there is still little application in our country, and the existing inspection products are less in the market. From the feasibility, the standard is used as a recommended method for reference by the users.
There are many ordinary people who wear glasses, so the use of full cover can not affect the sealing glasses, wearing glasses can not influence the mask, for example, can not be inserted in the seal glasses, it will lead to leakage. The best way to solve this problem is to choose a full cover with a built-in frame, or choose a closed hood or an open mask.3. some people may not be suitable for the use of respiratory protection for some diseases on the cardiopulmonary system for extra respiratory load will aggravate their condition; there are some people in the narrow space instinctively feel fear, anxiety, or there is a sense of isolation, the psychological reaction will affect the operation accuracy and work efficiency. Even the impact of risk. The standard appendix F, "medical evaluation of the use of respiratory protective equipment", describes some of the physiological and psychological considerations that will help to identify people who are not suitable for use.
A fitness test is a method of testing the fit of a kind of closed mask to a specific user. This method has been introduced from abroad and has not been used in China before. It is good, the protection and safety of users can use the competent health objective method to choose reasonable design products, eliminating the risk of leakage, which is especially important for selection of negative pressure respirator.
Close mask (i.e., half face mask and full cover) relies on close contact with the user's face to ensure proper protection. The human face is varied, and each design of the closed type mask is not suitable for all people, there may be leakage when wearing. How to avoid this situation? Closed type mask usually have different shapes according to the size of the face, but only according to the type selection still cannot reliably determine suitable degree. In the standard appendix E for the selection, use and maintenance of respiratory protective articles, a relatively simple method called suitability test is introduced.
