Hi there, I'm Jim, I'm an EMT with XYZ Ambulance, I'll be taking care of you today., what's your name? Hi Jerry, what can I help you with? Your chest hurts? Ok, really quick, couple silly questions I ask everyone,how old are you...57...ok I need you to tell me what city we're in...ok and what is today?"
Boom 30 seconds, and I have a 57 yo Male (named Jerry) complaining of chest pain, he has an open patent airway because he's talking to me (and here based on how he's talking to I note in the back of my head if he's having any difficulty breathing because I can see any tripoding, accessory muscle usage, if he's talking in full sentences or if he has 2-3 word dyspnea, etc....oh and I'm looking at his skin signs seeing if anything looks abnormal or not, basically does he look big sick or little sick? I also go ahead and check a quick radial pulse whilst talking, now that same 30 seconds, boom I now also know skin color/temp/moisture, I'm not counting specific pulse rate, just feeling if it's too fast or slow, or just about right, if it's string or weak, or even too strong......voila 30 seconds I know the status of their ABCs, as well as AVPU, A&Ox whichever, GCS, name age and chief complaint, and I haven't even opened up my bag to take vitals yet. ) It takes a lot longer to talk through the ABCs than to actually assess them.
Don't forget, vitals are secondary assessment. Knowing if his blood pressure is 120/80 or 130/90 doesn't matter at this stage....if he's talking to me clearly, I know he has more or less clear lungs, I can take a listen a bit later in on the assessment....now if he looks Big Sick with cool pale diaphoretic skins I'll put a higher priority on getting a blood pressure reading...if they're complaining of shortness of breath I'm gonna listen to their lungs sooner rather than later, etc. remember while there's a specific order for school tests....in the real world, things are a little more fluid....and you also have at minimum 1 other person with you....often times (depending on where you're at) a fire company as well so someone can start taking vitals as soon as you walk up and start asking them questions.