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Oxygen therapy is a pivotal aspect of medical care, particularly for patients with respiratory ailments. Two prominent oxygen-delivering systems include the Venturi mask and the transtracheal oxygen catheter.
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  11. A Retrospective Characterization Of Pediatric Facemasks Marketed In The United States And Implications For Future Designs

A retrospective characterization of pediatric facemasks marketed in the United States and implications for future designs

Ali Hasani1, Bryan Ibarra1, Kirstie Snodderly2

  • 1Division of Applied Mechanics, Office of Science and Engineering Laboratories, U.S. Food and Drug Administration, Silver Spring, Maryland, United States of America.

Plos One
|September 19, 2024

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View abstract on PubMed

Summary
This summary is machine-generated.

New research establishes pediatric facemask testing standards, defining a worst-case flow rate of 45-60 Liters/minute and acceptable pressure drop of 2.0 mmH2O. A developed bench-top tool aids in quantitative fit assessment for pediatric facemasks.

Area of Science:

  • Biomedical Engineering
  • Respiratory Protection
  • Pediatric Health

Background:

  • Manufacturers need standardized methods to market pediatric facemasks in the U.S.
  • Current pediatric facemask testing lacks accepted methodologies and established flow/pressure drop parameters.
  • Unlike N95 respirators, pediatric facemask performance benchmarks are undefined.

Purpose of the Study:

  • Determine worst-case flow rate and acceptable breathing resistance for pediatric facemasks via literature review.
  • Develop a bench-test protocol for assessing the fit of pediatric facemasks.
  • Provide practical implications for users, academia, and medical device manufacturers.

Main Methods:

  • Literature survey to establish worst-case flow rate (45-60 LPM) and acceptable pressure drop (2.0 mmH2O).

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  • Retrospective assessment of marketed pediatric facemasks' filtration efficiency and pressure drop at various flow rates.
  • Adaptation and application of a validated adult manikin fit-test method to pediatric manikins (ages 2-14 years).

    • Main Results:

    • Pediatric facemasks show high filtration (>95%) at 5 LPM, decreasing to ~80% at 45 LPM.
    • Pressure drop at 5 LPM is 0.3-0.6 mmH2O, but exceeds 2.0 mmH2O (2.9-6.0 mmH2O) at higher flow rates.
    • Manikin fit testing revealed issues with nose-clip adherence, low filtration efficiency, and off-label use contributing to poor fit.

    Conclusions:

    • A novel bench-top tool for quantitative pediatric facemask fit evaluation has been developed.
    • Established worst-case flow rate and acceptable pressure drop provide critical data for mask design and testing.
    • Findings offer practical guidance for improving pediatric respiratory protection standards and fit assessment.