In cardiac arrest or traumatic arrest, the MOST suitable vein is for intravenous access is:

a. Dorsal hand
b. Leg veins
c. Antecubital vein
d. External jugular

c
Rationale: a. The dorsal hand is a distal peripheral vein and is not preferred in states of decreased perfusion.
b. Leg veins are distal peripheral vein and is not preferred in states of decreased perfusion.
c. Correct.
d. Although the external jugular vein is a peripheral vein, it is preferred to utilize the antecubital vein unless it is not accessible.