Which vein is commonly used for venipuncture?

• A. Median cubital vein
• B. Popliteal vein
• C. Femoral vein
• D. Carotid artery

Answer: (D)

The site used for venipuncture is typically a superficial, large vein in the antecubital fossa because it’s easy to feel, easy to access with a straight needle path, and relatively stable. The median cubital vein sits in the bend of the elbow and is usually large enough to puncture comfortably, well anchored, and often visible or palpable. It lies away from major nerves and arteries, which helps minimize complications and makes it the first choice for many blood draws.

Nearby or deeper veins like the popliteal vein (behind the knee) or the femoral vein (in the groin) are not practical for routine venipuncture due to their depth and accessibility. The carotid artery in the neck is an artery, not a vein, and puncturing it would be dangerous.