2, the hospital used to tie the finger of the blood collection needle is out of the box
Lab personnel, the usual disinfection sterilization is very concerned about, the concept of sterility in the medical staff are aware of! You said the blood collection needle are disposable, because usually this thing is placed in the box, but its needle is sterile, and will not use a needle to stab two people!
3, there is a bucket of sterilized water next to it is for holding medical sharps after use!
The idea is ok, self-preservation is great! Anyway you won't get any bacterial viruses from this!