Carbon Dioxide Versus Iodine Contrast for Endovascular Revascularization of Aortoiliac Occlusive Disease

In the CO2 arm we used manual injection of CO2 from a medicinal CO2 cylinder connected to a particle filter. Under water aspiration was used to prevent air contamination. Using a twenty mls syringe the required amount of CO2was aspirated using a three way tap and was followed my aspirating 3mls of saline to provide a fluid barrier. In the ICM arm the injection of contrast was done using 10-ml syringes with 5 mls of iodinated contrast media and 5 mls of saline solution per injection. The ICM used in all cases was Omnipaque 300 (Iohexol), a nonionic low osmolar contrast commonly in use in both hospitals.