What am I looking at?
Visual recognition
Dedicated closed CO₂ delivery setup, typically consisting of a purpose-built injector or controlled syringe-and-tubing system rather than a conventional iodinated-contrast syringe alone.
06-02
CO₂ angiography delivery system
Negative-contrast delivery system
Three-panel learning framework
Recognition, context, and distinction
What does it do, and where will I see it?
Use & procedural context
Non-nephrotoxic, non-allergenic gas injected as a negative contrast agent that displaces blood to opacify vessels, used when iodinated contrast is undesirable or contraindicated. Typical procedural contexts include angiography or intervention when iodinated contrast is undesirable, including renal insufficiency or severe contrast allergy, as well as venography and endoleak evaluation.
What most clearly distinguishes it from similar devices?
Key distinctions
CO₂ is a negative contrast agent, so the angiographic column appears lucent rather than radiopaque; the dedicated delivery system is therefore distinct from standard iodinated-contrast injection equipment.