A technician identified as a sonographer conducts a carotid ultrasound with a small, handheld device identified as a transducer. The transducer emits seem waves and records the echo given that the waves bounce off tissues, organs and blood cells. Tobacco use. Nicotine can irritate the internal lining in the arteries. https://www.sgvascularctr.com/revealing-the-latest-innovations-in-carotid-artery-disease-treatment/