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 accessibility and size. Located in the antecubital fossa, or the crease of the elbow, this vein typically has a large diameter, allowing for easy blood draw, which reduces the likelihood of complications such as hemolysis or difficult blood retrieval. Additionally, the median cubital vein is often centrally located and not positioned near major arteries or nerves, increasing the safety of the procedure.

Other veins mentioned may have specific uses but are not preferred for routine blood draws. The femoral vein, while large, is deeper and associated with a greater risk of complications and infection when accessed. The basilic vein, although accessible, is situated near major nerves and arteries, making it a riskier site for phlebotomy. The cephalic vein can be more challenging to locate in certain patients and may not always provide the best quality blood sample. Overall, the median cubital vein’s combination of size, accessibility, and safety makes it the standard choice for phlebotomy.