Which vein is the most common site used for phlebotomy?

The median cubital vein is the most common site used for phlebotomy due to its location and characteristics that make it ideal for blood draws. This vein is situated in the antecubital fossa, which is the area at the front of the elbow. It is typically large, close to the surface of the skin, and does not have major arteries or nerves nearby, minimizing the risk of complications during the procedure.

Additionally, many patients have a clearly visible and palpable median cubital vein, which eases identification for the phlebotomist. Its central position in the arm also provides easier access to the bloodstream. Overall, these factors combine to make the median cubital vein the preferred choice for blood collection in clinical practices.