This is going to be through the eyes of a basic, dealing with drugs a basic can give, because that's all I am, so I apologize.
You're dispatched to a call for a 64 y/o male pt complaining of chest pain.
u/a you find pt seated, pale and slightly diaphoretic.
What's your name? As you're putting him on O2, start asking him to describe the pain, go through systematically, When did the pain start? Is there anything that makes it better or worse? Try as best you can to describe what the pain feels like. Does the pain go anywhere, or does it stay localized? On a scale of one to ten how severe is the pain? This will go really quickly. Get a quick set of vitals, then ask if he's allergic to asprin or pks, if not give him 235mg asprin. Get any meds at this point, its important, because we can assist with nitro. At this point, from a basic standpoint, following protocol, ALS would be on scene, and we'd be relocating to the rig. While en route ask what he was doing when teh pain started. What did he eat last? Any PMH? Get more vitals, and continue to check up on the severity of the pain, any other symptoms that should require additional assessment.
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Essentially, just be systematic. Once you get into the rythym of it, it becomes habitual.
I dunno if this really helped, but I tried.