Which patch keeps the carotid artery open longer?

This trial compares two types of patches used to close the artery after carotid endarterectomy, a surgery that removes blockages in the neck artery to prevent stroke. The Accuseal patch, a newer synthetic option, is tested against the Bovine Pericardial patch, which has been used for decades. The goal is to see which patch better reduces bleeding during surgery, lowers the risk of stroke, and prevents the artery from narrowing again over time. The study includes patients with significant carotid artery narrowing, whether they have had symptoms or not.