- #1
rohanprabhu
- 414
- 2
recently i got a tetanus-prevention injection.. and i noticed that the nurse after piercing the needle, plugged the plunger back and took some blood inside the syringe [very little].. like 1/10th the solution in it and then pushed the plunger back. My question is.. why did she do that? My first guess was that she was making sure that it is being injected into a blood vessel.. but i have no idea about biology.. so i thought i'd ask it here.