@capatov I suppose that since they already were going to anesthetize you, they didn't insist that you be awake for the catheterization, and since your were already IV'd at discharge, she was willing to use the existing IV to administer Fentanyl?
Actually, I'm kind of surprised that she was willing to use the Fentanyl even though you already had the IV installed at the time...the DEA has intimidated many medical providers into being very stingy with painkillers for fear of legal action against them.