What technique is used in directional atherectomy to shave off pieces of plaque?

Directional atherectomy is a minimally invasive procedure used to treat atherosclerotic lesions in blood vessels by removing plaque. The technique utilizes a specialized catheter equipped with a cutting mechanism that directs the removal of plaque in a specific direction.

The correct choice emphasizes the use of a balloon that is inflated to expose the cutter. In directional atherectomy, this technique allows the clinician to deploy a cutting mechanism (often referred to as a “cutter”) that is then advanced to shave off layers of the plaque. By inflating the balloon, the cutter is effectively positioned against the plaque to facilitate the excision of the material without damaging the surrounding healthy vessel wall.

The precision of this technique minimizes trauma while directly addressing the occlusion caused by plaque buildup, making it an efficient and effective means of restoring blood flow. The directional aspect is significant as it enables tailored plaque removal to ensure optimal outcomes.

In contrast, other options involve different mechanisms, such as ultrasonic vibration or rotation, which do not accurately represent how directional atherectomy specifically operates with regards to the cutter being deployed. Understanding the mechanics behind this technique is crucial for practitioners in interventional radiology, as it directly influences procedural decisions and patient outcomes.