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Potassium studies in chronic obstructive airways disease

Semple P d'A, W S Watson, R Hume

    Thorax
    |December 1, 1978
    PubMed
    Summary

    Chronic obstructive airways disease patients with low arterial carbon dioxide levels often have low total body potassium (TBK). This potassium depletion is more pronounced after cor pulmonale episodes.

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    Area of Science:

    • Pulmonary Medicine
    • Clinical Nutrition
    • Cardiology

    Background:

    • Chronic obstructive airways disease (COPD) is often associated with altered body composition.
    • Potassium depletion is a recognized complication in various chronic illnesses.
    • Previous studies on potassium levels in COPD have yielded conflicting results.

    Purpose of the Study:

    • To investigate total body potassium (TBK) levels in male patients with COPD in remission.
    • To determine the relationship between arterial carbon dioxide tensions and TBK.
    • To assess the impact of cor pulmonale on TBK.

    Main Methods:

    • Seventeen male COPD patients in remission were divided into hypercapnic and normocapnic groups based on arterial carbon dioxide levels.
    • Total body potassium (TBK) was measured using a whole body monitor.
    • Serum and erythrocyte potassium concentrations were also analyzed.

    Main Results:

    • Normocapnic COPD patients were significantly lighter and had significantly lower mean TBK compared to hypercapnic patients.
    • Two patients exhibited significantly low TBK, and the normocapnic group showed a significantly low mean TBK.
    • Three out of four patients with a recent history of cor pulmonale had significantly low TBK.

    Conclusions:

    • Low total body potassium (TBK) is a significant finding in some patients with chronic obstructive airways disease.
    • Potassium depletion appears more severe following episodes of cor pulmonale.
    • Normocapnia and lower body weight in COPD patients may indicate a higher risk of TBK depletion.

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