Carbon dioxide as an intravascular imaging agent: review

Area of Science:

• Radiology
• Vascular Imaging
• Medical Contrast Agents

Background:

• Diagnostic imaging in patients with renal impairment or contrast allergies presents significant challenges.
• Traditional iodinated contrast media carry risks of nephrotoxicity and allergic reactions in susceptible populations.

Purpose of the Study:

• To evaluate carbon dioxide (CO(2)) as a safe and effective intravascular contrast agent for arteriographic and venographic procedures.
• To highlight the diagnostic utility of CO(2) in patients with contraindications to conventional contrast agents.

Main Methods:

• Review of CO(2) properties relevant to intravascular use, including viscosity, allergenicity, and renal safety.
• Discussion of arteriographic applications (e.g., peripheral vascular disease evaluation) and venographic applications (e.g., transjugular intrahepatic portosystemic shunt procedures).

Main Results:

• CO(2) demonstrates low viscosity, absence of allergic reactions, and no renal toxicity, supporting its use as a contrast alternative.
• Technical challenges in CO(2) delivery exist, requiring specific procedural considerations.
• While generally safe, potential adverse effects associated with CO(2) administration have been reported.

Conclusions:

• Carbon dioxide is a viable alternative intravascular contrast agent for specific diagnostic evaluations in high-risk patients.
• The unique properties of CO(2) mitigate risks associated with traditional contrast agents, but procedural challenges and potential adverse events must be managed.