A one lung hit deer can live for a while. I have witnessed them live for 24 hrs. If you push them you could lose the deer. Also, I have gutted a deer that only had one functioning lung. When I opened her up her right lung was deflated. Found where an arrow had cut the back end. Ur deer could still be running around, but I would get some buddys together and do a body search. It is most likely dead.
Darton Pro 1100 65#
QAD Ultra Rest Pro Series HD
Carbon Express Maxima Blue Streak 350
G5 Striker Broadheads
G5 Magloc Arrow Quiver
Browning X-Bolt 30.06
Whackin a Michigan deer with an all Michigan archery set up...that's Pure Michigan!