Flat diaphragm

Introduction Diaphragm lowering is an imaging manifestation of pulmonary x-ray diagnosis of emphysema, lung abscess or tracheal foreign body.

Cause

Found in emphysema, lung abscess or tracheal foreign body.

an examination

Tracheal foreign body: Under fluoroscopy, the bilateral lung transillumination can be increased, the transverse position is low, and the trachea is obstructed. When the exhalation is over, the lungs become darker and the lateral sputum rises less obviously, and the heart shadow has an abnormal size.

Lung abscess: Early inflammation is characterized by large, densely blurred infiltrating shadows, unclear edges, or densely shadowed patches, distributed in one or several segments of the lung. After the formation of lung abscess, a large amount of purulent sputum is discharged through the bronchus, and a circular cavity with a gas-liquid plane is visible on the chest radiograph, and the inner wall is smooth or slightly irregular. Chronic lung abscess, hollow wall thickness, irregular abscess, size, honeycomb, surrounded by fibrous tissue hyperplasia and adjacent pleural thickening.

Emphysema: X-ray examination showed an increase in anterior and posterior diameter of the thoracic cavity, sternal protrusion, widening of the posterior sternal space, low squat level, decreased lung texture, increased lung field transmittance, overhanging heart, pulmonary artery and major branches Wide, peripheral blood vessels are small.

Differential diagnosis

Diaphragmatic lesion

1. Morphological changes: pedicle-like adhesions, sputum lowering, blunt occlusion, and localized masses.

2. Position change: single or bilateral sputum elevation, sputum decline.

3 Movement changes: the movement weakens or disappears.

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