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Carbon monoxide diffusing capacity in polycythaemia rubra vera

A P Greening, K Patel, A W Goolden

    Thorax
    |July 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

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    In polycythaemia rubra vera patients, the diffusing capacity of the lung for carbon monoxide (TLCO) is elevated due to expanded blood volume. The TLCO test can monitor treatment response in this condition.

    Area of Science:

    • Pulmonary Medicine
    • Hematology

    Background:

    • Polycythaemia rubra vera (PRV) is a condition characterized by an increased red blood cell mass.
    • The impact of PRV on lung function, specifically gas exchange, is not fully understood.

    Purpose of the Study:

    • To investigate the diffusing capacity of the lung for carbon monoxide (TLCO) in patients with PRV.
    • To assess the relationship between TLCO, hemoglobin concentration, and blood volume in PRV.
    • To evaluate the utility of the TLCO test in monitoring PRV treatment.

    Main Methods:

    • TLCO was measured in 12 PRV patients.
    • Measurements were analyzed before and after treatment.
    • Correlations with hemoglobin and red cell volume were examined.

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    Main Results:

    • TLCO was significantly elevated in PRV patients, even after correcting for hemoglobin levels.
    • TLCO and pulmonary capillary blood volume decreased after PRV treatment.
    • A strong correlation was observed between TLCO and red cell volume.

    Conclusions:

    • The pulmonary capillary bed expands with increased blood volume in PRV.
    • The single-breath TLCO test is a valuable tool for monitoring PRV treatment response.