Which of the following veins is preferred for venipuncture in the antecubital area?

The median vein is preferred for venipuncture in the antecubital area primarily because of its location and structure. This vein, often centrally located, typically runs along the inner elbow and is more centrally positioned compared to other veins such as the cephalic and basilic veins. Its accessibility and visibility make it an ideal choice for blood draws. The median vein also tends to have a larger and more stable lumen, which helps facilitate easier access and reduces the risk of complications during the procedure.

The cephalic vein, while often an option, is located further laterally, making it more difficult to access in some patients, especially those with obesity or other anatomical considerations. The basilic vein runs deeper and is located more medially, which poses a higher risk of complications such as damage to adjacent nerves or arteries during the venipuncture process. The laterally placed vein refers to any veins outside of the median or basilic veins, which are generally less accessible and not preferred due to their variability and potential for complications.

Overall, the median vein's central position, ease of access, and reduced risk of complications make it the preferred site for venipuncture in the antecubital area.