PMID- 26273701
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20240323
IS  - 2377-1372 (Print)
IS  - 2377-1372 (Electronic)
IS  - 2377-1372 (Linking)
VI  - 2
IP  - 2
DP  - 2015 Sep 7
TI  - Comparison of Simulated Workplace Protection Factors Offered by N95 and P100 
      Filtering Facepiece and Elastomeric Half-Mask Respirators against Particles of 10 
      to 400 nm.
PG  - 1-6
AB  - This study compared the simulated workplace protection factors (SWPFs) between 
      NIOSH-approved N95 respirators and P100 respirators, including two models of 
      filtering facepiece respirator (FFR) and two models of elastomeric half-mask 
      respirator (EHR), against sodium chloride particles (NaCl) in a range of 10 to 
      400 nm. Twenty-five human test subjects performed modified OSHA fit test 
      exercises in a controlled laboratory environment with the N95 respirators (two 
      FFR models and two EHR models) and the P100 respirators (two FFRs and two EHRs). 
      Two Scanning Mobility Particle Sizers (SMPS) were used to measure aerosol 
      concentrations (in the 10-400 nm size range) inside (C(in)) and outside (C(out)) 
      of the respirator, simultaneously. SWPF was calculated as the ratio of C(out) to 
      C(in). The SWPF values obtained from the N95 respirators were then compared to 
      those of the P100 respirators. SWPFs were found to be significantly different 
      (P<0.05) between N95 and P100 class respirators. The 10(th), 25(th), 50(th), 
      75(th) and 90(th) percentiles of the SWPFs for the N95 respirators were much 
      lower than those for the P100 models. The N95 respirators had 5(th) percentiles 
      of the SWPFs > 10. In contrast, the P100 class was able to generate 5(th) 
      percentiles SWPFs > 100. No significant difference was found in the SWPFs when 
      tested against nano-size (10 to 100 nm) and large-size (100 to 400 nm) particles. 
      Overall, the findings suggest that the two FFRs and two EHRs with P100 class 
      filters provide better performance than those with N95 filters against particles 
      from 10 to 400 nm, supporting current OSHA and NIOSH recommendations.
FAU - He, Xinjian
AU  - He X
AD  - National Institute for Occupational Safety and Health, National Personal 
      Protective Technology Laboratory, Pittsburgh, PA ; Industrial and Management 
      Systems Engineering, College of Engineering and Mineral Resources, West Virginia 
      University, Morgantown, WV.
FAU - Vo, Evanly
AU  - Vo E
AD  - National Institute for Occupational Safety and Health, National Personal 
      Protective Technology Laboratory, Pittsburgh, PA.
FAU - Horvatin, M
AU  - Horvatin M
AD  - URS, Inc. Pittsburgh, PA.
FAU - Liu, Y
AU  - Liu Y
AD  - National Institute for Occupational Safety and Health, National Personal 
      Protective Technology Laboratory, Pittsburgh, PA ; Institute of Health 
      Surveillance, Analysis and Protection, Hubei Center for Disease Control and 
      Prevention, Wuhan, Hubei, China.
FAU - Bergman, M
AU  - Bergman M
AD  - National Institute for Occupational Safety and Health, National Personal 
      Protective Technology Laboratory, Pittsburgh, PA.
FAU - Zhuang, Z
AU  - Zhuang Z
AD  - National Institute for Occupational Safety and Health, National Personal 
      Protective Technology Laboratory, Pittsburgh, PA.
LA  - eng
GR  - CC999999/Intramural CDC HHS/United States
PT  - Journal Article
PL  - United States
TA  - J Nanotechnol Mater Sci
JT  - Journal of nanotechnology and materials science
JID - 101664422
PMC - PMC4529391
MID - NIHMS709765
OTO - NOTNLM
OT  - FFR
OT  - HER
OT  - N95
OT  - Nano particle
OT  - P100
OT  - Respirator
OT  - SWPF
EDAT- 2015/08/15 06:00
MHDA- 2015/08/15 06:01
PMCR- 2015/09/07
CRDT- 2015/08/15 06:00
PHST- 2015/08/15 06:00 [entrez]
PHST- 2015/08/15 06:00 [pubmed]
PHST- 2015/08/15 06:01 [medline]
PHST- 2015/09/07 00:00 [pmc-release]
AID - 10.15436/2377-1372.15.015 [doi]
PST - ppublish
SO  - J Nanotechnol Mater Sci. 2015 Sep 7;2(2):1-6. doi: 10.15436/2377-1372.15.015.