The depth of a vein is not as important as its diameter, but longer IV catheters are needed for veins that lie more than 1 cm from the surface of the skin. Standard IV catheters are 3.2 cm long ...

Most blood draws occur through the median antecubital vein, located in the inner elbow region. ... or IV drug abuse may also lead to scarring of the veins or render veins not easily accessible. 6.

Subclavian Veins. In a study in children aged between 4 days and 15 yrs, a 4% overall complication rate associated with percutaneous insertion of subclavian vein catheters was reported.

His temperature was 38.6°C. A 3-by-4-cm area of erythema and swelling with drainage was present in the right antecubital fossa. The physical examination was otherwise unremarkable.