Evaluation of Face Shields Used During Aerosol Generating Procedures

Details

• Personal Author:
  Brown GD ; Hoffman HT ; Nonnenmann MW ; Pratt AA ; Walsh JE
• Description:
  Transnasal flexible laryngoscopy is considered an aerosol generating procedure. A negative pressure face shield (NPFS) was developed to control aerosol from the patient during laryngoscopy. The purpose of this study was to determine the effectiveness of the NPFS at controlling virus aerosol compared to a standard disposable plastic face shield. The face shields were placed on a simulated patient coughing machine. MS2 bacteriophage was used as a surrogate for SARS-CoV-2 and was aerosolized using the coughing machine. The aerosolized virus was sampled on the inside and outside of the face shields. The virus aerosol concentration was not significantly different between the inside and outside of the traditional plastic face shield (p = 0.12). However, the particle concentrations across all particle sizes measured were significantly decreased outside the face shield. The virus and particle concentrations were significantly decreased (p < 0.01) outside the NPFS operating at a flow rate of 38.6 L per minute (LPM). When the NPFS was operated at 10 LPM, virus concentrations were not significantly different (p = 0.09) across the face shield. However, the number particle concentrations across all particle sizes measured were significantly different (p < 0.05). [Description provided by NIOSH]
• Subjects:
  Aerosols Health Personnel Occupational Health Personal Protective Equipment Safety Viral Diseases
• Keywords:
  Aerosol Particles Face Shields Health Care Workers Particle Aerodynamics Personal Protective Equipment PPE SARS-CoV-2 Viral Diseases
• ISSN:
  2045-2322
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Iowa ; Nebraska ; OSHA Region 7
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  13
• NIOSHTIC Number:
  nn:20068525
• Citation:
  Sci Rep 2023 Sep; 13:15617
• Contact Point Address:
  Alessandra A. Pratt, Iowa City VA Health Care System (152), 601 Highway 6 West, Building 42, Iowa City, IA, 52242, USA
• Email:
  Alessandra.Pratt@va.gov
• Federal Fiscal Year:
  2023
• Performing Organization:
  University of Iowa
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Scientific Reports
• End Date:
  20290630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:88b79961f212d0e19d912d582d3967e2e901b9cc2b1f9e8686d738b65536dceee9a9d01256a430cd8fe66a79df13bce796de36383285112f76ee23d75e416235
• Download URL:
  https://stacks.cdc.gov/view/cdc/207139/cdc_207139_DS1.pdf
• File Type:
  [PDF - 3.69 MB ]