A technician called a sonographer conducts a carotid ultrasound with a small, handheld device referred to as a transducer. The transducer emits audio waves and documents the echo given that the waves bounce off tissues, organs and blood cells. Last but not least, the surgeon gets rid of the tube https://www.sgvascularctr.com/revealing-the-latest-innovations-in-carotid-artery-disease-treatment/