Which antecubital vein is most commonly used for intravenous administration of a radiopharmaceutical?

The cephalic vein is the most commonly used antecubital vein for intravenous administration of a radiopharmaceutical due to its accessibility and visibility. It runs along the outer side of the forearm and is often larger in diameter compared to the basilic and other nearby veins, making it a favorable choice for venipuncture.

In addition to its size, the cephalic vein is generally easier to locate and puncture, which is important in clinical settings where timely administration of radiopharmaceuticals is essential. The basilic vein, while also a significant superficial vein, is located more medially and can be more difficult to access due to its proximity to major nerves and arteries.

Other options such as the radial and ulnar veins are primarily located in the wrist area and are less commonly used for intravenous access in this context, as they are smaller and may provide a less stable access point for administering medications or radiopharmaceuticals.

Overall, the cephalic vein’s combination of good accessibility, size, and less complicated anatomical surroundings makes it the preferred choice for intravenous administration in nuclear medicine procedures.