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Related Experiment Videos

An evaluation of the mini-Wright peak flow meter.

W H Perks, I P Tams, D A Thompson

    Thorax
    |February 1, 1979
    PubMed
    Summary

    The mini-Wright peak flow meter (MPFM) correlates well with the standard Wright

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    Area of Science:

    • Pulmonary Function Testing
    • Medical Device Evaluation

    Background:

    • The Wright's peak flow meter (PFM) is a standard device for measuring peak expiratory flow.
    • Assessing the reliability of alternative devices is crucial for clinical applications.

    Purpose of the Study:

    • To evaluate the performance of the mini-Wright peak flow meter (MPFM) against the standard PFM.
    • To determine the accuracy, bias, and variability of the MPFM.

    Main Methods:

    • Comparative analysis of MPFM and PFM measurements.
    • Statistical evaluation including correlation coefficients and confidence limits.
    • Assessment of inter-instrument and day-to-day variability.

    Main Results:

    • A strong positive correlation (r=0.970) was observed between MPFM and PFM.
    • MPFM measurements showed a bias of approximately 38 L/min higher than PFM.
    • Significant inter-instrument variation was detected, though individual measurement variability remained acceptable.

    Conclusions:

    • The MPFM is a portable, cost-effective device for monitoring ventilatory function.
    • Clinical use requires accounting for MPFM's bias and inter-machine variability.
    • Awareness of manufacturer modifications to the MPFM scale is essential for future studies.

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