Stent with Umbrella Filter
An angioplasty in the carotid arteries can pose the very serious risk of creating embolisms, tiny blood clots, which may travel to the smaller blood vessels of the brain. There they can become lodged and cause a stroke. To guard against this, a tiny umbrella-like filter can be attached to the stent, a coil of wire mesh used to expand the blocked vessel. At the end of the stenting procedure, the filter and its debris are removed from the artery.