Q: While inserting radial arterial line, it should be placed as near as possible to radius styloid process

A) True
B) False


Answer:  B (False)

To target appropriate placement of radial arterial line, the best superficial anatomical marker is over the radial pulse at the proximal flexor crease of the wrist. The insertion should be at least 1 cm proximal to the radius styloid process to avoid puncturing the retinaculum flexorum and the small superficial branch of the radial artery.