RT Journal Article SR Electronic T1 Carbon Dioxide Column Angioscopy: A New Endovascular Imaging Technique JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1849 OP 1853 VO 22 IS 10 A1 László Miskolczi A1 James D. Flaherty A1 Lee R. Guterman A1 L. Nelson Hopkins YR 2001 UL http://www.ajnr.org/content/22/10/1849.abstract AB Summary: A new angioscopic technique with a CO2 gas medium for prolonged viewing sessions in the carotid artery is described. A stationary column of CO2 gas, angled 17–30° subhorizontally and buoyed against a balloon catheter, can be safely maintained. During 10–20-min sessions in dogs, endothelia, thrombi, stent filaments, coils, and an intimal flap were visualized. This technique eliminates the need for continuous saline infusion, which has prevented the application of angioscopy in the carotid artery.