Learn how to find a vein using a tourniquet when drawing blood or starting an IV in the arm (antecubital AC area). This video is a teaching tutorial for nursing students, new nurses, or phlebotomists on how to find the cephalic, basilic, and medical cubical veins in the antecubital area of the arm. Finding a vein can be difficult when you are a new nurse, phlebotomist, or healthcare professional. Some patients have small veins covered in a layer of subcutaneous fat.