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  • Title: Acute unilateral pulmonary nonventilation due to mucous plugs.
    Author: Pham DH, Huang D, Korwan A, Greyson ND.
    Journal: Radiology; 1987 Oct; 165(1):135-7. PubMed ID: 3306782.
    Abstract:
    Acute bronchial obstruction by mucous plugs may be manifested clinically by dyspnea, hypoxemia, and respiratory alkalosis mimicking pulmonary thromboembolism. In eight cases with complete interruption of ventilation to an entire lung, chest radiography failed to reveal the extent of the obstruction. Perfusion was substantially less affected than ventilation. Routine ventilation-perfusion scintigraphy with technetium-99m DTPA aerosol aids in the diagnosis of acute major bronchial obstruction in patients with suspected pulmonary thromboembolism.
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