Where it is
In the antecubital fossa, connecting the cephalic vein (thumb side) and the basilic vein (little finger side).
What it does
Drains blood from the superficial forearm; it is large, superficial and well anchored, so it rolls less during venipuncture.
Clinical relevance
- First choice for venipuncture in adults.
- IV catheters in the antecubital fossa can kink when the elbow bends; forearm veins are better for long-term IVs.
- The brachial artery and median nerve lie deeper in the same area.
Nursing focus
- Apply the tourniquet 7–10 cm above the site and release it within 1 minute.
- If you see bright red pulsatile blood, you are in an artery: remove the needle and apply firm pressure for at least 5 minutes.