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Evaluating bronchial drainage pathways in patients with lung disease using digital subtraction angiography
F Tanaka1, K Hayakawa, Y Satoh
1Department of Radiology, Kyoto City Hospital, Japan.
Rationale And Objectives:
The purpose of the study was to evaluate the venous drainage pathways of the bronchial circulation during bronchial embolotheraphy or infusion therapy.
Methods:
The subjects consisted of 21 patients with lung disorders. All of them underwent bronchial arteriography for drug infusion or embolization. Bronchial arteriography was done using both cut-film and digital subtraction methods.
Results:
The venous drainage pathways of arteriograms could be determined in 15 (71%) patients and classified into the four types: type 1, direct drainage into a pulmonary vein; type 2, drainage into a pulmonary artery with antegrade flow; type 3, drainage into a pulmonary artery with retrograde flow; and type 4, drainage into a bronchial vein. No drainage route could be identified in six (29%) patients.
Conclusions:
Digital subtraction angiography can depict the venous drainage pathways in most patients. Drainage occurs into a pulmonary vein in the majority of patients.