This is all just assumption. I don’t recall there ever being some sort of “medical standby status” ever mentioned in any of the shows before.They didn't know how bad of a situation Ortegas was going to be in, so send in security to plan for the worse.
I'm sure the Medical Team is on "StandBy Status for Incoming Injuries".
The fact that they can easily beam in/out shows they're operating under their usual Emergency Situation SOP's.
Not bringing down any medical aid still doesn’t make any sense.