Which trial followed Zeller's initial clinical trial in 2009?

• A. OAS Small Feasibility Trial
• B. OASIS IDE at TCT 2009
• C. Patlola Trial
• D. None

Answer: (B)

In medical device testing, the progression often moves from an initial feasibility or early human study to a larger, formally regulated IDE (Investigational Device Exemption) trial that collects broader safety and effectiveness data. The OASIS IDE at TCT 2009 fits this next-step role, as it represents the IDE-stage study following Zeller’s initial clinical trial in 2009 and was showcased at the TCT conference that year. This makes it the best answer because it aligns with the typical sequence of advancing from early feasibility to an IDE study intended to support regulatory submission. The small feasibility trial would typically occur earlier, and the Patlola Trial is a different research line, while “None” isn’t accurate since there was a subsequent IDE trial.