Correlation of certain bronchographic abnormalities seen in chronic bronchitis with the pathological changes.

In their description of the changes seen in the bronchograms of patients with chronic bronchitis, Simon and Galbraith (1953) described the absence of peripheral filling as the most frequent change in the lung periphery and also the presence of " pools," the name applied to dense blobs of contrast medium, 3-5 mm. in diameter, which arise from the peripheral part of the bronchial tree. The present investigation is concerned with the significance of the lack of filling and the nature of the "pools" in patients with chronic bronchitis. The opportunity has also been taken to investigate another abnormal shadow with a spiked outline which is sometimes seen in patients with chronic bronchitis and emphysema.