Carotid Artery Duplex Scan

The purpose of a carotid artery duplex scan is to detect the presence of atherosclerosis (narrowing caused by plaque) in your carotid arteries, which are the arteries in your neck that supply blood flow to your brain. Some indications for a carotid artery duplex scan include weakness, paralysis or dysfunction of limbs, change in speech, visual disturbances, numbness or tingling in limbs, and balance disturbances.