CPT® Code 35509

A carotid-contralateral carotid bypass graft, identified by CPT® Code 35509, is a surgical procedure designed to create a new pathway for blood flow using a vein graft. This procedure is specifically indicated for patients with a diseased or obstructed segment of the carotid artery, which can lead to reduced blood flow to the brain and increase the risk of stroke. The surgery involves making an incision over the common carotid artery on one side of the neck, allowing the surgeon to access and carefully dissect the artery from surrounding tissues. The procedure requires meticulous handling of nearby nerves and veins to minimize complications. The surgeon dissects the carotid artery for a length of approximately 5-6 cm to ensure adequate exposure for the grafting process. A similar dissection is performed on the contralateral carotid artery to facilitate the connection of the vein graft. The use of soft rubber loops helps control blood flow during the procedure, ensuring a safe environment for the creation of a bypass. A vein graft, often harvested from the saphenous vein in the leg, is then used to bypass the obstructed area. The graft is sutured to both the healthy carotid artery and the diseased contralateral carotid artery, restoring blood flow and improving circulation to the brain. The procedure concludes with checks for graft patency using Doppler ultrasound and evaluation of distal pulses, ensuring the success of the bypass graft.