Which process can be used to maintain vessel patency after deployment?

• A. Clot dissolution
• B. Balloon-expandable stenting
• C. Fluid infusion
• D. Image-guided needle biopsy

Answer: (B)

The process that can be utilized to maintain vessel patency after deployment is balloon-expandable stenting. This technique involves the placement of a stent—a small, mesh-like tube—into a narrowed or blocked portion of a blood vessel. After positioning the stent, a balloon is inflated within the stent to expand it, which helps to hold the vessel open and maintain blood flow.

The balloon-expandable stent is specifically designed to keep the vessel open in a way that is both effective and durable, significantly reducing the likelihood of re-narrowing or occlusion, which may occur if other treatment options were used. This is crucial in interventional radiology and angioplasty procedures, where maintaining vessel patency is essential for optimal patient outcomes.

Other processes mentioned, like clot dissolution, could address existing blockages but don't provide a structural solution to maintain vessel openness post-deployment. Fluid infusion can support blood flow but doesn't actively prevent vessel narrowing. An image-guided needle biopsy is a diagnostic procedure with no relevance to the maintenance of vessel patency. Thus, the balloon-expandable stenting stands out as the most effective approach for preventing vessel closure once a stent is deployed.