Related Experiment Video

Updated: Aug 10, 2026

Use of Electromagnetic Navigational Transthoracic Needle Aspiration (E-TTNA) for Sampling of Lung Nodules
06:03

Use of Electromagnetic Navigational Transthoracic Needle Aspiration (E-TTNA) for Sampling of Lung Nodules

Published on: May 23, 2015

Simulated paraspinal tumor or abscess by rounded atelectasis of the lower lobe

M Melamed, H T Langston, C Reynes

    Chest
    |April 1, 1975
    PubMed

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    Atelectasis II: Pathophysiology01:10

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    Atelectasis develops when alveoli lose their air and collapse inward. Because lung tissue is naturally elastic, these air sacs shrink rather than remaining open. Collapsed alveoli are no longer ventilated, reducing their role in gas exchange. Blood flow may continue in these regions, creating a ventilation–perfusion mismatch. Clinical findings include decreased breath sounds, dullness to percussion, reduced chest expansion, and decreased tactile fremitus as sound transmission through collapsed...