Always change.
If you hit the bottom of the vial, the end of the pin can 'barb'...put that into yourself and when you are withdrawing you could risk snagging muscle fibre...ouch!
This is a small risk, but a risk all the same.
I know I'm still a 'newbie' but have been here for ages.
If you hit the bottom of the vial, the end of the pin can 'barb'...put that into yourself and when you are withdrawing you could risk snagging muscle fibre...ouch!
This is a small risk, but a risk all the same.
I know I'm still a 'newbie' but have been here for ages.