Hi there, silly question but I am a nursing student and we are obviously always told never to recap needles, however, in our practice labs I was withdrawing medication from a rubber vial, once the needle is pulled out of this vial while still attached to the syringe, how are we supposed to discard this needle and attach a new sterile one without recapping?? The teacher stated to just twist off the needle that still attached to the syringe with our other hand, but surely that's a needle stick risk as well as the potential to contaminate the tip of the syringe..