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In carotid angioplasty and stenting, a long hollow tube called a catheter is inserted in the femoral artery in the groin area. The catheter is then maneuvered through the arteries until it reaches the narrowing in the carotid artery in the neck. An umbrella-shaped filter is inserted beyond the narrowing to catch any plaque or debris that may break off during the procedure. Then, a tiny balloon at the end of the catheter is inflated to push the plaque to the side and widen the vessel. A small metal coil called a stent is inserted into the vessel. The stent serves as a scaffold to help prevent the artery from narrowing again.
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