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Evaluation of a microprocessor-controlled exercise testing system.

N L Jones

    Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology
    |November 1, 1984
    PubMed
    Summary
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    The new Beckman Horizon MMC exercise testing system offers precise measurements for ventilation and gas exchange. Its microprocessor control and calibration ensure reliable data acquisition for both healthy individuals and cardiorespiratory patients.

    Area of Science:

    • Cardiopulmonary Exercise Testing
    • Respiratory Physiology
    • Medical Device Evaluation

    Background:

    • The evaluation of new exercise testing systems is crucial for advancing cardiopulmonary diagnostics.
    • Accurate measurement of ventilation (VE) and expired gas concentrations (VO2, VCO2) is essential for assessing cardiorespiratory function.

    Observation:

    • The Beckman Horizon MMC system utilizes a microprocessor for data acquisition, correction, calibration, and quality control.
    • High precision was observed for VE and mixed expired gas concentrations in both steady-state and incremental exercise tests.
    • The system demonstrated good agreement with established methods, including breath-by-breath analysis, for measuring VO2 and VCO2.

    Findings:

    • VO2 measurements showed high precision (SD 66 ml/min, 4.3%) with excellent correlation (r=0.991) in steady-state exercise.

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  • VCO2 measurements exhibited comparable precision (SD 67 ml/min, 4.55%) with a slight systematic underestimation (4.62%).
  • Correlation coefficients for VE, VO2, and VCO2 were consistently high (≥0.994) in healthy subjects during incremental exercise.

    • Implications:

    • The Beckman Horizon MMC system provides accurate and reliable cardiorespiratory data, suitable for diverse patient populations.
    • Microprocessor-controlled, frequent calibration procedures enhance the system's usability and data integrity.
    • This system represents a significant advancement in exercise testing technology, aiding in clinical assessment and research.