Dionosil aqueous," 10-15 ml., was introduced by catheter into the left bronchus for bronchography, as described by Smith, Davies, Rothwell, Lodwig, and Mahoney (1960). The immediate film showed good bronchial filling confined to the left lung and most complete in the upper lobe. There was no obvious bronchial block except possibly in a subdivision of the left apico-posterior bronchus. The posterior division of the left upper lobe was updrawn.
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Leopold et al. (1961) studied this question.