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Related Experiment Videos

Variability of the lateral position test in normal subjects

S J Jay, R B Stonehill, S O Kiblawi

    The American Review of Respiratory Disease
    |January 1, 1980
    PubMed
    Summary

    The lateral position test (LPT) shows significant day-to-day and within-day variability in measuring unilateral pulmonary function in healthy adults. Multiple LPT trials are essential for reliable clinical interpretation due to this inherent inconsistency.

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    Area of Science:

    • Pulmonary Physiology
    • Diagnostic Test Evaluation

    Background:

    • The lateral position test (LPT) is used to assess unilateral pulmonary function.
    • Understanding the test's reliability is crucial for clinical application.

    Purpose of the Study:

    • To evaluate the day-to-day and within-day variability of the lateral position test (LPT) in healthy individuals.
    • To determine the reproducibility of LPT measurements in normal subjects.

    Main Methods:

    • 10 healthy, nonsmoking young adults participated.
    • The lateral position test (LPT) was performed in triplicate for 5 consecutive days.

    Main Results:

    • Significant variability in unilateral pulmonary function measurements by LPT was observed from day to day and test to test within the same individual.

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  • Variability between repeated measurements by the same or different observers was minimal.

    • Conclusions:

    • The inherent variability of the LPT in repeated measurements necessitates multiple tests per subject for meaningful interpretation.
    • The significant variability limits the clinical utility of the LPT for assessing unilateral pulmonary function.