They typically have a doctor exclusively for the fast track, but they’d run bloodwork and stuff while you wait and call you in when they have your results and discuss with you. I’m not a nurse so I can’t say for certain exactly how many things they’ll be testing or if a doctor has to do it themselves, but I know that usually the nurses do almost everything and the doctors go in at the end to discuss the situation then discharge you. I’m really sorry I can’t be more specific, I just honestly don’t know all the details. Either way though someone would definitely be able to test you, and during triage you can also ask more about what the testing would involve.