Auricular Artery Catheterization
The auricular arteries are located on the dorsum of the ear and are most easily palpated on the upper one-third of the ear. Using digital palpation, each vessel on the ear is palpated for a pulse and the artery identified. Good head restraint is used and an over-the-needle catheter is placed and taped into place. A pulsing flow of bright red blood confirms arterial placement. Hematoma formation is common from arterial catheterization and after a failed attempt at catheterization or after removal of a catheter, firm pressure should be applied to the insertion site for several minutes.