1. Consider the user's facial features
Close-fitting masks, such as half-masks and full-face masks, depend on a tight seal against the face to provide effective protection. However, human faces vary in shape and size, and a mask that works well for one person may not fit another properly. This can lead to gaps or leaks, reducing the mask’s effectiveness. To avoid this issue, it's important to select the right size. But even with proper sizing, the fit cannot always be guaranteed just by choosing the correct model.
Suitability testing is an essential process that helps determine whether a specific type of close-fitting mask is appropriate for a particular user. This method allows both workers and safety officers to make informed decisions based on objective data, ensuring that masks are not only comfortable but also fully functional. It is especially crucial when selecting negative-pressure respirators, where even small leaks can pose serious health risks.
Although new suitability testing methods have been developed, they are still relatively uncommon in China, and there are few commercially available tools for conducting these tests. As a result, the standard recommends this approach as a useful reference for users to consider when making their selection.
Another important factor to consider is facial hair, particularly in men who have beards or mustaches. These can interfere with the mask's ability to form a proper seal, making it unsuitable for use. If it's not possible to convince the wearer to shave, alternative options like open-face masks or hoods should be considered instead.
2. Consider people wearing glasses
Many individuals wear glasses regularly, and using a full-face mask can sometimes cause discomfort or affect the fit. If the mask’s sealing surface interferes with the glasses, it can create gaps, leading to leakage. The best solution is to choose a full-face mask that includes an integrated spectacle frame, or opt for a hood or open-face mask that doesn’t require a tight seal. This ensures both comfort and effective protection.
3. Some people may not be suitable for respiratory protection
Individuals with certain heart or lung conditions may experience increased breathing resistance when using respirators, which could worsen their condition. Others might feel anxious or uncomfortable, which can impact their performance and safety. The standard’s Appendix F, titled "Medical Evaluation of the Use of Respiratory Protective Devices," outlines medical and psychological factors that should be considered to identify those who may not be suitable for using such equipment.
China Labor Insurance Network
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