Yep, we should move that down to 6LPM via nasal cannula. Hah! Rookie mistake!
And I agree with the thought of getting vascular access in the vehicle. Reason I said immediately is, because he may have already lost a good amount of blood and I'd want a saline lock in now in case his veins degrade rapidly. If I don't have to go IO on the dude, I don't want to.