Believe me - I get everything that y'all are saying. However...
I'm taking much of this in the context of the OP's case - abdominal pain of unknown etiology in a sick patient with a 7 minute transport time.
In this particular case there is little if anything to be gained by managing this patient in the field. Regardless if it's my guess of bowel obstruction or whether it's a leaking aneurysm or SMA infarct - there just isn't much you can do outside the hospital. Now, if I'm out in the country with an hour transport time, I might consider other options, including judicious use of MS for pain. But with a short transport time and a far from certain diagnosis, I'm just not that hot on field management. If you're doing all these things while transporting, that's fine - although my guess is the OP has done several things (12 lead, blood sugar, IV, etc.) all while at the patient's residence. Again - for this particular case - O2, IV, transport would seem to be reasonable. I'll even go for a little morphine.