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Related Experiment Videos

Evaluation of a new spirometer based on a fluidistor technique.

G Hedenstierna, S Lundberg, D Rawlings

    Acta Anaesthesiologica Scandinavica
    |January 1, 1976
    PubMed
    Summary

    A new fluidistor spirometer shows accuracy within +/-5% for normal breathing volumes compared to existing devices. Modifications could improve its performance at low and high flow rates for clinical use.

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    Area of Science:

    • Medical Devices
    • Respiratory Physiology

    Background:

    • Spirometry is crucial for assessing lung function.
    • Existing spirometers have limitations in accuracy and usability.

    Purpose of the Study:

    • To evaluate a novel spirometer based on fluidistor principles.
    • To assess its accuracy and suitability for clinical applications.

    Main Methods:

    • Evaluation using a mechanical model and human subjects.
    • Comparison with a Bernstein spirometer at various minute volumes.
    • Analysis of factors influencing measurement error.

    Main Results:

    • Accurate within +/-5% at normal minute volumes.
    • Underread at low volumes and overread at high volumes.

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  • Error increased with prolonged expiratory time and low-density gases.

    • Conclusions:

    • The fluidistor spirometer is stable, easy to handle, and accurate enough for anesthesia and intensive care.
    • Potential for improved accuracy at varying flow rates with adaptable flow heads.