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Related Experiment Videos

A system for processing by digital computer spirograms acquired in field surveys.

C J Derrett, C Brown

    Thorax
    |December 1, 1975
    PubMed
    Summary

    Field spirometry can now be performed using a modified spirometer and cassette tape recorder. This allows for laboratory analysis of expiratory spirograms, calculating key lung function parameters like forced vital capacity.

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    Area of Science:

    • Pulmonary Medicine
    • Biomedical Engineering
    • Medical Instrumentation

    Background:

    • Spirometry is crucial for assessing lung function.
    • Field-based lung function testing presents logistical challenges.
    • Accurate and accessible spirometry is needed for widespread respiratory health monitoring.

    Purpose of the Study:

    • To describe instrumentation and techniques for field recording of expiratory spirograms.
    • To detail the laboratory analysis of these field-recorded spirograms using a digital computer.
    • To enable comprehensive lung function parameter calculation from field data.

    Main Methods:

    • Modification of a commercial spirometer to generate an electrical output signal.
    • Recording the signal onto a cassette tape recorder for field data acquisition.
    • Utilizing a digital computer for spirogram display and analysis in the laboratory.

    Main Results:

    • Successful recording of expiratory spirograms in a field setting.
    • Computerized analysis yielded accurate calculations of key pulmonary function metrics.
    • Parameters calculated include forced vital capacity (FVC) and one-second forced expiratory volume (FEV1).

    Conclusions:

    • The described system provides a viable method for field-based spirometry.
    • This technique enhances the accessibility of lung function testing outside clinical settings.
    • The approach facilitates detailed analysis of respiratory parameters, aiding in the diagnosis and management of pulmonary diseases.

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