Since I don't see any advanced directives, they don't exist (In NY you have to physically see them).
As someone said earlier, calmly convince the patient to let you check vitals, since he is actively in distress.
This is definitley something I would want to get medical control involved in. I only feel this way because the patient is AOx3 and is resisting transport, (unless he goes unresponsive)
For the sake of our EMT student, what did your instructor think of the answers that were given here? It was pointed out earlier to consider some of your own solutions then come here with them and let members advise you. I personally like to see that you put effort into it on your own.