Respiratory fit-testing: A glossary
User seal check
Also called a fit-check. In this procedure, the user performs a simple maneuver to determine if the seal is adequate in an approximate, qualitative fashion. For example, the user may obstruct the inlet ports and attempt to inhale; passage of air implies that there is significant leakage at the facial sealing surface. The individual performs this type of assessment each time he or she dons a mask.
Quantitative fit-testing
A probe inside the mask measures leakage of a marker material placed in the surrounding air. It requires the assistance of a trained industrial hygienist or someone with equivalent technical skills. It is generally not feasible with single use/ disposable respirators.
Qualitative fit-testing
A substance such as saccharin or Bitrex (an extremely bitter compound) is sprayed into the air, and the user is asked whether he or she detects it.
You have reached your article limit for the month. Subscribe now to access this article plus other member-only content.
- Award-winning Medical Content
- Latest Advances & Development in Medicine
- Unbiased Content