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Microaneurysms of the carotid artery after "non-traumatic" percutaneous puncture.

A series of 18 patients was studied to determine if damage incurred to the carotid artery during percutaneous puncture could be detected angiographically. Microaneurysms were seen in 78% of the arteries studied. Characteristically, lesions are seen on both walls of the vessel. Microaneurysms are considered to be the most likely site of mural thrombosis, and the probable cause of emboli and delayed complications resulting from percutaneous puncture.