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Comparing to N95 and Surgical Masks

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Tommy Sharkey edited this page May 15, 2020 · 1 revision

While standing and breathing normally, a certified N95 mask was compared to our DIY Triton Mask.

We measured the number of particles inside of the masks and showed that on average, our mask out-performs or is comparable to N95 masks.

Mask

Average particles inside mask / cc

Average particles/cc outside mask

%Particle Penetration

N95

582.7

33928.57

1.717

DIY Surgical Wrap Velcro Mask

530.3

33928.57

1.563

DIY Surgical Sterilization Wrap Respirator

401.17

43833.33

0.9152

Surgical Mask

30647.23

43833.33

69.92

While full tests were not performed on our other masks, the brief testing indicated that some of our DIY masks were performing better or close to N95 masks.

Authors and Contributors:

  • Shiv Patel (UCSD Simulation Training Center and Weibel Lab)
  • Tommy Sharkey (UCSD DesignLab and Weibel Lab)
  • Nadir Weibel (UCSD DesignLab and Weibel Lab)

References

  1. “COVID-19 Map.”, Johns Hopkins Coronavirus Resource Center. Accessed April 8, 2020. https://coronavirus.jhu.edu/map.html.
  2. Yu X, Yang R. COVID-19 transmission through asymptomatic carriers is a challenge to containment. Influenza Other Respir Viruses. 2020. [PMID:32246886]
  3. Center for Disease Control and Prevention (CDC), “Recommendation Regarding the Use of Cloth Face Coverings, Especially in Areas of Significant Community-Based Transmission”, https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/cloth-face-cover.html
  4. MacIntyre CR, Seale H, Dung TC, et al. A cluster randomised trial of cloth masks compared with medical masks in healthcare workers. BMJ Open. 2015;5(4):e006577. [PMID:25903751]
  5. Karlamangla, Soumya. 2020. “There Are No Masks Left in L.A. County’s Emergency Stockpile.” Los Angeles Times, March 26, 2020. https://www.latimes.com/california/story/2020-03-25/coronavirus-healthcare-workers-masks-gowns-reuse
  6. University of Florida Health, “Mask Alternative”, https://anest.ufl.edu/clinical-divisions/mask-alternative
  7. Halyard ® POWERGUARD Technology, https://www.halyardhealth.com/solutions/surgical-solutions/sterilization-solutions/sterilization-wrap.aspx
  8. Medline ® Dual Color Bonded Surgical Instrument Wraps, https://www.medline.com/product/Dual-Color-Bonded-Surgical-Instrument-Wraps/Sterilization-Wraps/Z05-PF77587
  9. Willeke, K., H.E. Ayer, J.D., “New Methods For Quantitative Respirator Fit Testing With Aerosols,” American Industrial Hygiene Association Journal, Feb 1981
  10. Amy Price, DPhil (Oxon) and Larry Chu, MD On behalf of the Stanford AIM Lab and Learnly COVID-19 Evidence Service Stanford Anesthesia Informatics and Media Lab, "Can face masks be safely disinfected and reused?", https://elautoclave.files.wordpress.com/2020/03/stanford-2020.pdf
  11. CDC. 2020. “Coronavirus Disease 2019 (COVID-19).” Centers for Disease Control and Prevention. April 7, 2020. https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/cloth-face-cover.html
  12. Thebault R., Tran A.B., and Williams V.; “The coronavirus is infecting and killing black Americans at an alarmingly high rate”, Washington Post, April 7, 2020; https://www.washingtonpost.com/nation/2020/04/07/coronavirus-is-infecting-killing-black-americans-an-alarmingly-high-rate-post-analysis-shows
  13. Walmart Inc, Smooth-On Silicone Mold Making, Liquid Rubber OOMOO 30 Easy to Use, https://www.walmart.com/ip/Smooth-On-Silicone-Mold-Making-Liquid-Rubber-OOMOO-30-Easy-to-Use-Trial-Size-2-8-lb/

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