What can I expect to happen during a blood transfusion?

See below. You will have an extensive interview regarding your health, past surgeries, recent travel, and certain lifestyle practices. Then your blood will be tested for the type and iron level. You will then proceed to a donation chair where the phlebotomist will start the donation through an iv. After that (about 20 minutes), you usually get a snack. They're making sure you won't faint. Then all done.