What is a key drawback of the EV3-Foxhollow Silverhawk plaque excision device?

• A. You have no idea how deep into plaque or vessel you're cutting
• B. It leaves plaque completely intact
• C. It cannot be used in peripheral arteries
• D. It requires general anesthesia

Answer: (A)

Depth control during plaque excision is the major limitation of the EV3-Foxhollow Silverhawk device. This directional atherectomy system shaves away plaque and collects debris, but you don’t have a reliable way to know exactly how deep you’re cutting into the plaque or into the vessel wall in real time. Fluoroscopic imaging shows where the cutter is and how much lumen you’re restoring, but it doesn’t provide precise feedback on tissue thickness or wall penetration. That means there's a real risk of perforation or dissection if the cutter goes too deep, which is the key drawback of this device.

For context, this device does remove plaque rather than leaving it intact, it’s used in peripheral arteries (not restricted to coronary vessels only), and general anesthesia isn’t a mandatory requirement—local anesthesia with sedation is commonly sufficient.