What was the final residual stenosis percentage reported in the Confirm Series?

• A. 5%
• B. 10%
• C. 15%
• D. 20%

Answer: (B)

Residual stenosis after an endovascular procedure shows how much narrowing remains and is a key indicator of how successful the immediate result is. In the Confirm Series, the final residual stenosis was ten percent, which is considered a favorable outcome because it means only a small amount of narrowing persists after treatment. This level sits in the range clinicians view as a good technical result, balancing achievable improvement with real-world imaging and measurement variability. Values higher, such as fifteen or twenty percent, indicate more remaining narrowing and can be associated with higher risk of restenosis, while a single-digit improvement like five percent, though excellent, is less commonly achieved in practice. The ten percent figure reflects a solid, effective outcome in contemporary series.