I'm not talking about long-term care. I'm talking about working the ER, which as you yourself pointed out in this quote, is typically only for a few to several hours.
In any event, as a diligent researcher, this forum is not the only method I've used to ascertain an answer to my pondering. I've also asked a fellow volunteer, who is a CNA and has in fact held the exact same job I'm talking about. This same person has also become an EMT, and with both sets of training under her belt as well as having had the same job I'm interested in now, she seemed like an ideal person to ask, which I did. And she said that there really wasn't any function of the job that an EMT-B with half a brain couldn't do.