Evaluation of an Alternate Sampling Device for Inside the Respirator Facepiece
Public Deposited- Last Modified
- February 27, 2019
- Creator
-
Ebert, Julie A.
- Affiliation: Gillings School of Global Public Health, Department of Environmental Sciences and Engineering
- Abstract
- Historically, the predominant sampling device for quantitative respirator fit testing has been a "standard" mask probe inserted through the front of the respirator. This probe was first developed by Dr. Ben Liu at the University of Minnesota and is widely used in quantitative respirator fit testing.An alternate sampling device, a cannula probe, has been used in place of the mask probe in respirator studies conducted at the Lawrence Livermore National Laboratory. The purpose of this study was to validate the previous research performed and give researchers the option of using a cannula probe, by comparing the sampling capabilities of the cannula with those of the mask probe. The cannula probe is a hospital-like nasal cannula, positioned between the nose and the upper lip of the subject with the probes pointed outward. The mask and cannula probes sampled aerosol concentrations inside the same respirator face piece. The conditions of the experiment were varied to determine the affect of different protection factors, respiration rates, and leak locations. The measured mean protection factors using the mask and cannula probes were compared through the application of a regression model. The cannula probe measured a slightly higher concentration of aerosol, resulting in a slightly lower protection factor, than the mask probe. Overall, the two probes were found to be comparable sampling devices with a very strong linear relationship. A potential use of the cannula probe, in place of the mask probe, may be in respirator studies where the respirator is loose fitting.
- Date of publication
- May 1998
- DOI
- Resource type
- Rights statement
- In Copyright
- Advisor
- Reist, Parker C.
- Todd, Lori A.
- Symons, Michael J.
- Degree
- Master of Science in Public Health
- Academic concentration
- Industrial Hygiene
- Degree granting institution
- University of North Carolina at Chapel Hill
- Graduation year
- 1998
- Language
- Deposit record
- 56f7e058-1c97-4774-9946-7afdcd8e0e36
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