Skip directly to site content Skip directly to page options Skip directly to A-Z link Skip directly to A-Z link Skip directly to A-Z link
Volume 10, Number 2—February 2004
THEME ISSUE
2004 SARS Edition
Infection Control

Surgical Helmets and SARS Infection

James L. Derrick*Comments to Author  and Charles D. Gomersall*
Author affiliations: *The Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region, People’s Republic of China

Main Article

Table

Ratio of ambient-to-device concentrations of 0.02- to 1-μm–diameter particles (median [range])a

Exercise Stryker T4 Stackhouse FreedomAire 3M 8233 N100 mask with surgical mask and face shield
Normal breathing 4.5 (4–5) 3 (2–4) 32,550 (1,420–60,900)
Deep breathing 4.5 (4–5) 3 (2–3) 21,550 (4,150–99,300)
Head side to side 4 (4–5) 3 (2–3) 15,675 (681–138,000)
Head up and down 4 (3–5) 3 (2–3) 19,300 (380–138,000)
Talking 4 (3–5) 3 (2–3) 1,550 (394–18,200)
Bending over 3.5 (3–4) 2 (2–3) 7,695 (1,620–31,000)
Normal breathing 4 (3–5) 2.5 (2–3) 22,100 (4,670–163,000)
Fit factor 3.8 (3.7–4.8) 2.5 (2.0–3.1) 6,392 (962–50,519)

aRatios for Stryker T4 and Stackhouse FreedomAire were significantly lower in all tests compared to the combination of N100 mask, surgical mask, and face shield (p <0.004.)

Main Article

Page created: January 27, 2011
Page updated: January 27, 2011
Page reviewed: January 27, 2011
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
file_external