Which blood vessels are typically used for creating a graft?

Veins are indeed the most commonly used blood vessels for creating a graft, particularly in surgical procedures like coronary artery bypass grafting (CABG). This is primarily because veins, such as the saphenous vein located in the leg, are easier to harvest, less prone to complications during extraction, and have a suitable diameter for bypassing blocked arteries.

While arteries can be used as well, they are more often retained within the body due to their vital role in supplying oxygenated blood directly to the organs. Capillaries, on the other hand, are much too small and numerous to be used in grafting procedures. Their primary function involves the exchange of substances such as nutrients and waste at the tissue level. Therefore, veins are the preferred choice for grafting due to their accessibility, ease of use, and the ability to effectively support blood flow in a bypass scenario.