Needle passing thru vein?

[Helpmeout]

Ill bump, but I believe the answer you are looking for is; if you hit a vein remove the pin and jab elsewhere

No, i mean.. here is an example:

the normal procedure is- pin>skin>muscle>vein>aspirate>blood in syringe.

*what im talking about is - pin>skin>vein>muscle>aspirate>no blood in syringe.. (if the pin passes thru (in and out) the vein then muscle)

got it?? lol its kinda confusing i know..