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Test Findings




    • Look For

    • Hyperlucency of the lung fields
    • Diaphragmatic flattening
    • Ten or more posterior ribs visible above the diaphragm
    • Mediastinal narrowing
    • Example

    • Hyperinflation in a patient with emphysema
    • Hyperinflation in a patient with emphysema
    • Significance

    • Hyperinflation is a sign of emphysema, though can rarely occur with other obstructive diseases such as asthma and bronchiectasis.
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