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Related Experiment Videos

A portable volume/flow calibrating syringe

J W Shigeoka, R M Gardner, H W Barkman

    Chest
    |November 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    A new calibrating syringe accurately measures forced expiratory flow (FEF25-75%) and volume. This portable device simplifies spirometer calibration in diverse settings, offering reliable results without CO2 cartridges.

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    Area of Science:

    • Pulmonary Function Testing
    • Medical Device Calibration

    Background:

    • Spirometry requires accurate calibration for reliable pulmonary function testing.
    • Existing calibration methods may have limitations in portability or applicability across different environments.

    Purpose of the Study:

    • To evaluate a novel manual 3 L calibrating syringe for its accuracy and suitability as a flow calibrator.
    • To assess the device's ability to measure forced expiratory flow (FEF25-75%) and volume.

    Main Methods:

    • Two samples of the calibrating syringe were tested.
    • Room air was discharged through the calibrator into an established, accurate manual spirometer system.
    • Calibrator-derived FEF25-75% values were compared against spirometer values across a range of 0.4 to 9 L/sec.

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    Main Results:

    • The calibrator-determined FEF25-75% values showed very close correlation with the spirometer values.
    • Differences between the calibrator and spirometer FEF25-75% were minimal (mean +/- 1%, max 3.7%), with negligible clinical impact.
    • The device accurately provided both FEF25-75% and volume measurements.

    Conclusions:

    • The portable, easy-to-operate calibrating syringe is suitable for accurate spirometer calibration.
    • Its ability to use displaced air makes it versatile for use at altitude and with various flow instruments.
    • This device enhances routine spirometer calibration in both laboratory and field settings.