Approximately how much contrast is typically used for a DSA procedure described in run-off setups?

Approximately how much contrast is typically used for a DSA procedure described in run-off setups?

• A. 60-70 cc
• B. 10-20 cc
• C. 100-120 cc
• D. 5-10 cc

Answer: (A)

In run-off DSA, you need enough contrast to opacify the long peripheral arterial tree—from the aorta through the iliofemoral segments down to the tibial vessels. That extended field requires a moderate amount of contrast to get clear, subtractable images across multiple runs. The typical total contrast used for a diagnostic run-off study is about 60–70 mL. This provides good vessel visualization while balancing patient safety and nephrotoxicity risk. Using only 10–20 mL won’t fill the extended bed adequately, and 100–120 mL is more than what’s usually needed for a standard run-off study. Very small injections (5–10 mL) are clearly insufficient for this imaging.

In run-off DSA, you need enough contrast to opacify the long peripheral arterial tree—from the aorta through the iliofemoral segments down to the tibial vessels. That extended field requires a moderate amount of contrast to get clear, subtractable images across multiple runs. The typical total contrast used for a diagnostic run-off study is about 60–70 mL. This provides good vessel visualization while balancing patient safety and nephrotoxicity risk. Using only 10–20 mL won’t fill the extended bed adequately, and 100–120 mL is more than what’s usually needed for a standard run-off study. Very small injections (5–10 mL) are clearly insufficient for this imaging.