Related Experiment Video
Updated: Nov 4, 2025
08:33
Use of Capillary Aerosol Generator in Continuous Production of Controlled Aerosol for Non-Clinical Studies
Published on: April 12, 2022
3.7K
Aerosol Generation During Peak Flow Testing: Clinical Implications for COVID-19
Yosuf W Subat1, Siva Kamal Guntupalli1, Pavol Sajgalik2
1Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Mayo Clinic, Rochester, Minnesota.
Respiratory Care
|May 26, 2021
Summary
Peak flow testing generates ultrafine particles, but at low concentrations compared to the clinical environment. Standard infection control measures like masks are likely sufficient for asymptomatic patients.
Area of Science:
- Pulmonary Medicine
- Infectious Disease Control
- Aerosol Science
Background:
- Peak flow testing is a common ambulatory care procedure.
- Data on aerosol generation during peak flow testing is lacking.
- Understanding aerosol generation is crucial for SARS-CoV-2 transmission control.
Purpose of the Study:
- To quantify and characterize aerosol generation during peak flow testing.
- To assess the significance of aerosol generation in the context of SARS-CoV-2 transmission.
- To compare aerosol generation across different peak flow meters.
Main Methods:
- Five healthy volunteers performed peak flow maneuvers.
- Ambient air was sampled using devices detecting ultrafine particles (0.02-1 μm) and larger particles (0.3-10 μm).
- Peak flow meters were compared to baseline tidal breathing (masked and unmasked).
Main Results:
- Ultrafine particles were generated during peak flow testing.
- No significant difference in ultrafine particle concentration was found between different peak flow meters.
- Peak flow testing generated significantly more ultrafine particles than tidal breathing, but concentrations were low compared to ambient levels.
Conclusions:
- Aerosol generation occurs during peak flow testing.
- Concentrations of generated aerosols are low compared to the clinical environment.
- Surgical masks and eye protection are likely adequate for asymptomatic patients; COVID-19 testing is advised for symptomatic individuals.
Related Concept Videos
01:25Transmission-based Precautions II: Airborne and Protective Environment
1.6K
Transmission-based precautions are for patients infected or suspected to be infected (or colonized) with organisms posing a significant risk to others. The transmission precautions include airborne and protective environment precautions.
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
1.6K
01:23Inhaled Medications
506
Inhaled medications are crucial for managing chronic obstructive pulmonary disease (COPD) and asthma. They are essential for effective treatment and control, ensuring optimal respiratory health and well-being. Inhaled medication delivers drugs directly to the lungs, providing a rapid onset of action and reducing systemic side effects compared to oral or injectable medications. Three primary types of inhalation devices are used to administer these medications: nebulizers, metered-dose inhalers...
506
01:20COPD: Pathogenesis and Clinical Features
1.5K
Chronic obstructive pulmonary disease (COPD) is a group of lung conditions that progressively worsen over time, including chronic bronchitis and emphysema. This cluster of diseases collectively leads to a gradual and irreversible decline in lung function over time.
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
1.5K