Respiratory Fit Testing

Quantitative and Qualitative

Fit Testing
is Important

Respiratory fit testing is a process that verifies if a tight-fitting respirator, like an N95 mask, provides a good seal with the user’s face. It ensures the mask properly covers the nose and mouth, preventing leakage of harmful particles or gases. Fit testing is crucial because a poorly fitting respirator can compromise the wearer’s protection.

Types of Respirators

In industrial work areas where workers are exposed to hazardous substances in the air, safety masks, also known as respirators, are essential personal protective equipment (PPE). These masks protect workers from inhaling harmful dusts, fumes, gases, vapors, or oxygen-deficient atmospheres. The specific type of respirator needed depends on the hazards present in the workplace.

Workers must wear the right type of respirator for the specific hazard they are exposed to.

Air-Purifying Respirators (APRs)

These reusable masks use interchangeable cartridges and filters to remove specific contaminants from the air.

Disposable Respirators (N95 masks)

These are cost-effective and widely used for particulate hazards like dust, pollen, and non-toxic aerosols.

Important Facts About Respirators

Tight-fitting respirators, like N95s, require a fit test to ensure a tight seal between the worker’s face and the respirator.
Respirators must be inspected, cleaned, and maintained according to manufacturer’s instructions to ensure their effectiveness.
Employers must provide training to workers on the proper use, limitations, and maintenance of respirators.
Fit testing involves the user wearing the respirator while performing a series of exercises that simulate normal work movements. These exercises can include talking, breathing, turning the head, and bending over.
Facial hair, such as beards or mustaches, can interfere with the respirator’s seal and require a different respirator or re-testing.
Proper fit testing ensures that respirators are providing the intended level of protection, safeguarding workers from respiratory hazards.

There are two main types of fit tests: qualitative and quantitative.

Qualitative Fit Tests: These tests use a challenging agent, like an irritating aerosol, to see if the user can detect any leakage.
Quantitative Fit Tests: These tests measure the amount of leakage into the respirator using instruments, such as a positive pressure gauge.