Quantitative fit testing is the preferred testing method. The ambient aerosol condensation nuclei counting (CNC) method, using a Portacount® Plus instrument, has been selected as the quantitative fit ...

A stress echocardiogram is an imaging test that monitors the functioning of the heart by inducing a stress test, a stimulus that facilitates a stressful environment within the heart. Through ...

The Hughson-Westlake method is based on the principle that short-tone burst are better heard against a silent background than a continuous tone separated by a short interval when the level is changing ...

A total knee replacement (TKR) may sound like a pretty drastic operation, but in fact it is an increasingly routine process providing relief from pain, improved leg function and improved quality of ...

WHEN OSHA's revised Respiratory Protection Standard for General Industry, 29 CFR 1910.134, became effective on April 8, 1998, it provided employers with an all-inclusive reference source for fit ...