Which are contraindications for the Spectranetics Excimer Laser?

• A. Present dissections and tortuous vessels
• B. Mild atherosclerosis
• C. Normal vessels
• D. Single, short lesion

Answer: (A)

The key issue is safe catheter delivery and controlled energy application. The Spectranetics Excimer Laser relies on precise positioning of the laser fiber to ablate plaque or tissue without causing unintended injury. If a vessel already has a dissection, applying laser energy can propagate that tear further or create new dissection planes, risking vessel perforation or uncontrolled injury. In vessels that are highly tortuous, advancing and steering the laser catheter becomes unreliable, increasing the chances of endothelial damage, incomplete treatment, or perforation. Because of these delivery and safety concerns, present dissections and tortuous vessels are contraindications. By contrast, normal vessels, mild atherosclerosis, or a single short lesion do not inherently contraindicate use; the laser may be used when the procedure and anatomy permit safe delivery and the expected benefits outweigh risks.