the flag
A junkie term used to describe when you slowly pull on the plunger on the syringe, the blood will shoot into the syringe, having a flag waving appearance. This is a way of knowing that you've hit a vein.
remember kiddies, if it's red(dark red, vein) go ahead, if it's pink(bright red, artery) stop and think
remember kiddies, if it's red(dark red, vein) go ahead, if it's pink(bright red, artery) stop and think
Example:
Sarah knew she hit a vein when she saw the flag. She then pushed on the plunger to get the H in her system.
Sarah knew she hit a vein when she saw the flag. She then pushed on the plunger to get the H in her system.