What is the first step in the DCB procedure process?

• A. PREP: lesion prep and plaque modification
• B. ASSESS: evaluate treatment success
• C. SEE: determine mechanism of ISR with IVUS
• D. TREAT: apply agent as appropriate

Answer: (C)

The initial step in the DCB procedure process is to determine the mechanism of in-stent restenosis (ISR) using intravascular ultrasound (IVUS). This is crucial because understanding the underlying cause of ISR can significantly influence the choice of treatment strategy. By assessing the characteristics of the ISR, such as the presence of plaque, the degree of vessel narrowing, and the condition of the stent, clinicians are better equipped to tailor the intervention according to the specific clinical scenario.

Identifying the mechanism of ISR lays the groundwork for subsequent steps in the procedure, as it informs the treatment approach, such as whether direct intervention on the lesion is necessary or if additional preparatory steps are required to optimize the outcome. It highlights the importance of thorough evaluation before proceeding with treatment, ensuring that the approach is both effective and safe for the patient.