Carbon dioxide gas as an arterial contrast agent

Area of Science:

• Vascular Imaging
• Interventional Radiology
• Medical Device Technology

Background:

• Carbon dioxide (CO2) gas is being explored as an arterial contrast agent, potentially reducing risks of renal injury and allergic reactions associated with traditional contrast media.
• Technical challenges exist in CO2 arteriography, with difficulties noted in visualizing distal lower extremity vessels, especially in cases of severe arterial occlusive disease.

Purpose of the Study:

• To evaluate the clinical utility and effectiveness of CO2 gas as an arterial contrast agent.
• To review institutional experience with CO2 arteriography for peripheral vascular disease assessment.

Main Methods:

• A retrospective review of 128 CO2 arteriograms performed on 115 patients.
• Blinded observer grading of CO2 arteriogram quality (excellent, good, poor, inadequate).
• Comparison of CO2 arteriography results with standard contrast arteriography in 98 patients and assessment of therapeutic plan accuracy.

Main Results:

• 91% of CO2 arteriograms were graded as good or excellent quality.
• 95% agreement between CO2 and standard contrast studies.
• Accurate therapeutic plans were established in 92% of cases; infrapopliteal artery visualization was the main limitation.
• No allergic reactions and only one potential case of contrast-induced nephrotoxicity were observed.

Conclusions:

• CO2 arteriography is a safe and clinically valuable tool for arterial imaging.
• This technology enhances the utility of arteriography, especially for patients with peripheral vascular disease, offering a low-risk alternative.