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Related Experiment Videos

Pulmonary involvement in ankylosing spondylitis.

N Feltelius, H Hedenström, G Hillerdal

    Annals of the Rheumatic Diseases
    |September 1, 1986
    PubMed
    Summary

    Ankylosing spondylitis patients show reduced lung function, even without symptoms. Pulmonary function tests can help stage the disease and monitor treatment effectiveness.

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    Response to letter from Lars Andersson.

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    Area of Science:

    • Rheumatology
    • Pulmonology
    • Medical Physiology

    Background:

    • Ankylosing spondylitis (AS) is a chronic inflammatory disease primarily affecting the axial skeleton.
    • Pulmonary complications in AS are not well-characterized, especially in early stages without symptoms.

    Purpose of the Study:

    • To investigate pulmonary function in AS patients without respiratory complaints.
    • To identify specific lung function abnormalities and their correlation with disease parameters.

    Main Methods:

    • Pulmonary function tests (PFTs) were performed on 32 AS patients and compared to a control group.
    • Evaluated lung volumes, closing volume/vital capacity ratio, and airway conductance.
    • Correlated PFT results with disease duration, thoracic mobility, and acute phase reactants.

    Main Results:

    • AS patients exhibited reduced lung volumes and decreased volumic airway conductance.
    • A raised closing volume/vital capacity ratio was observed.
    • Lung volume reduction correlated significantly with disease duration, reduced thoracic mobility, and elevated acute phase reactants.

    Conclusions:

    • The stiffened thorax in AS likely impairs lung function, with potential small airway involvement.
    • PFTs are valuable for detecting subclinical lung disease in AS.
    • PFTs may aid in disease staging, treatment evaluation, and differentiating from pulmonary fibrosis.

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