ARBORIZING PULMONARY EMBOLIZATION FOLLOWING LYMPHANGIOGRAPHY - REPORT OF 3 CASES AND AN EXPERIMENTAL STUDY

Experimental studies in dogs indicated a threshold dose for intravenous and intralymphatic injection of Ethiodol beyond which stippled or arborizing pulmonary embolization was observed almost invariably. This was usually followed in 2 to 4 hr. by patchy, confluent parenchymal infiltrates, most of which gradually cleared over 24 to 72 hr. Significant amounts of intravascular oil were demonstrated on roentgenograms of the post-mortem lung when chest roentgenograms in vivo failed to show arborizing emboli.