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Updated: Jul 17, 2025

Employing the Forced Oscillation Technique for the Assessment of Respiratory Mechanics in Adults
Published on: February 9, 2022
Annual N95 respirator fit-testing: an unnecessary burden on healthcare
Thomas C S Martin1,2, Genevieve Curtin1, Natasha K Martin1
1University of California San Diego, San Diego, California, USA.
Abstract:
US regulations mandate annual N95 mask fit testing for healthcare workers, but the optimal testing interval is unknown. In our study using data from 12,565 healthcare workers, the probability of survival free from fit-test failure after 3 years was 99.4%, suggesting that less frequent fit testing every 3 years would be safe.
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