Based on one-to-one feedback offered residents and attendings:
1. Presentation: Tailor your presentation so that it supports your top differential diagnosis and excludes life-threatening etiologies for any given chief complain. For example, if you believe someone has low back pain secondary to musculoskeletal strain and not disc herniation or cauda equina syndrome, then say something along the lines of "ROS negative for radiation of pain down the legs or symptoms of radiculopathy; denies any numbness, tingling, or weakness of lower extremities; denies any urinary retention or incontinence... etc."
Overall, most of my presentations were under 2 minutes during my first EM rotation and they ranged between 30-60 seconds on my last AI depending on the chief complaint.
2. Have a broad differential diagnosis that includes life-threatening causes, even if they are unlikely. Some attendings may only want to hear what you think is the most likely diagnosis while others you to list the life-threatening causes that need to be excluded/considered while the patient is in the ED.
3. Be ready to explain why you want to get any given lab/imaging study on a patient; just getting a CBC/BMP because it's "routine lab work, cheap, fast" is not sufficient. What are you actually looking for in those labs that can help support your initial assessment or potentially change your management plan?
4. What will your disposition be once those labs/imaging studies you ordered are back? Does this patient need to be admitted? If so, which service should we consult? If you send them home, whom should they follow up with and what symptoms should they come back to the ED for?
5. Reassess/check up on your patients. Is their pain/nausea/vomiting/whatever improving or worsening? Have their vital signs changed? Are they OK to go home or is it looking like they will need to be admitted for observation?
6. Know some of the scoring scales and admission criteria for common complaints such as chest pain, dyspnea, pneumonia, cellulitis, head injury. This is where your phone comes in pretty handy (e.g., I use MedCalc for NEXUS C-Spine rule, PECARN algorithm, PERC, Wells Score, Centor Score, HEART score, Ottawa Ankle/Knee Rules, Ranson's Score, RIFLE Classification). This will make you sound smart/like you know stuff, or maybe sound pretentious depending on the attending listening.
7. Have basic knowledge of pain management options (PO and IV) commonly used in the ED and their respective indications/contraindications. I swear every attending at some point asked me "so... what do you want to give for pain?"
8. Be proactive about doing basic procedures (sutures, I&Ds, LPs, splints, wound dressings, etc.) or at least show interest in learning how to do them.
9. Do the same common sense stuff that applies to other specialities, and life in general really: Be on time; don't be an a-hole to nurses, techs. Interact and get to know the residents; ask how you can help them.
10. Fluids... IV fluids for everyone... Or something like that.
11. Mention stuff like PE, ruptured triple A, dissection, SAH, CES as part of your DDx whenever possible. They love that ****.
12. Have fun!
**Bolded items are things that ≥3 attendings/residents at different programs emphasized as important and a quality. For reference, I completed three EM rotations, two of them being sub-internship/acting-internship rotations.