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Related Experiment Videos

Limitations of self-inflating resuscitators.

N N Finer, K J Barrington, F Al-Fadley

    Pediatrics
    |March 1, 1986
    PubMed
    Summary

    Self-inflating resuscitators with reservoirs significantly improve oxygen delivery. Pop-off valve activation reduces FIO2, with only the Laerdal model consistently achieving high oxygen concentrations.

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    Area of Science:

    • Medical Devices
    • Respiratory Care
    • Biomedical Engineering

    Background:

    • Self-inflating resuscitators are critical for emergency ventilation.
    • Performance variability necessitates rigorous laboratory characterization.
    • Oxygen concentration (FIO2) is a key performance metric.

    Purpose of the Study:

    • To evaluate the FIO2 performance of three self-inflating resuscitator models.
    • To assess the impact of reservoirs and pop-off valve function on FIO2.
    • To compare device performance across various compression rates and gas flows.

    Main Methods:

    • Laboratory testing of Ohio Hope II, PMR-2, and Laerdal resuscitators.
    • Use of a test lung with compression frequencies from 10 to >60 breaths/min.
    • Testing with and without reservoirs, and at pressures below and above pop-off valve settings.

    Main Results:

    • Devices with reservoirs delivered significantly higher FIO2 (P < .001).
    • Pop-off valve activation significantly reduced FIO2 (P < .005).
    • Laerdal resuscitator with reservoir achieved FIO2 >0.9 across tested conditions.

    Conclusions:

    • Reservoirs are essential for optimizing FIO2 in self-inflating resuscitators.
    • Pop-off valve settings critically influence oxygen delivery.
    • Device design, specifically the Laerdal model, impacts FIO2 capabilities.

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