CPT® Code 35501

A bypass graft is a surgical procedure designed to create an alternative pathway for blood flow around a diseased or obstructed segment of the common carotid artery, specifically directing blood to the ipsilateral internal carotid artery. This procedure utilizes a vein, which can be harvested from the patient or obtained from a donor, to form the graft. The surgery is performed through an incision in the neck, allowing the surgeon to access the common carotid artery directly. Once the artery is exposed, clamps are applied to control blood flow and isolate the affected area. The surgeon may choose to tie off the artery above the obstruction to ensure that blood is redirected through the newly created graft. One end of the harvested vein is then meticulously sutured to the common carotid artery, establishing a connection that will facilitate blood flow. After securing the graft, a vessel clamp is placed on the venous graft while the arterial clamp is released, allowing the surgeon to check for any leaks at the anastomosis site. Following this, the internal carotid artery is also exposed and clamped distal to the graft site. The other end of the vein graft is then sutured into the internal carotid artery, and the site is again inspected for leaks and patency. Once confirmed, the neck incision is closed, completing the procedure. This surgical intervention is critical for restoring adequate blood flow to the brain, thereby reducing the risk of stroke and other complications associated with carotid artery disease.