Publications by authors named "Michael R Nelsen"
Purpose: To evaluate the prevalence of intermittent opacification, a finding previously described as diagnostic of active bleeding that allows identification of an injured vessel at initial aortography or first-order selective angiography.
Materials And Methods: Retrospective review was performed of 35 consecutive cases that were positive for true or false aneurysm, arteriovenous fistula or malformation, or hemorrhage when a lesion was located beyond a first-order branch of the aorta. An artery that potentially supplied the lesion was considered positive if it filled with contrast material, emptied, and filled again while adjacent vessels demonstrated progressive opacification.