Which treatment approach is effective for undersized or underexpanded stents?

• A. Medication alone
• B. Non-compliant balloons and imaging
• C. NC balloons to achieve proper expansion
• D. Conventional angioplasty with no adjuncts

Answer: (C)

The effective treatment approach for undersized or underexpanded stents involves the use of non-compliant (NC) balloons to achieve proper expansion. Non-compliant balloons are specifically designed to maintain their shape under high pressure, allowing for a more controlled and uniform expansion of the stent. This is crucial because if a stent is undersized or not fully expanded, it may not adequately support the vessel and could lead to complications such as restenosis or thrombosis.

By utilizing NC balloons, clinicians can apply higher pressures to the stent, which helps to ensure that it expands fully to the intended diameter. This approach can also improve the apposition of the stent to the vessel wall, optimizing blood flow and reducing the risk of complications associated with underexpanded stents. Post-expansion with NC balloons is a common practice in interventional cardiology and peripheral vascular interventions to enhance the outcomes of stenting procedures.

Other approaches, such as medication alone, imaging, or conventional angioplasty without adjuncts, may not provide the necessary mechanical force required to properly expand a stent that is not adequately sized. Therefore, non-compliant balloons are the preferred method for addressing this specific issue with stents.