Emergency Medicine: Prioritized Assessment and Disposition
Core concepts
The Emergency Medicine domain tests whether you can move from an undifferentiated presentation to a safe disposition using a prioritized, time-aware approach. Expect questions on resuscitation sequencing, recognition of time-critical diagnoses (aortic dissection, ectopic pregnancy, necrotizing fasciitis, compartment syndrome, testicular torsion), risk stratification tools (HEART, Wells, PERC, Ottawa rules, NIHSS), and appropriate use of imaging and empiric therapy.
Traps to watch
- Anchoring on the first vital sign or chief complaint. A "normal" triage set does not exclude catastrophic illness; reassess after initial interventions.
- Choosing the most sensitive test when the question asks for the most appropriate next step. In an unstable patient, bedside ultrasound or empiric treatment usually precedes CT.
- Forgetting contraindications to thrombolysis (recent surgery, uncontrolled BP, anticoagulation) when a stroke or STEMI stem is presented.
- Misreading "next best step" as "definitive diagnosis." Stabilize, then diagnose.
- Ignoring disposition. Questions often hinge on admission vs. observation vs. discharge with follow-up.
Worked example
A 58-year-old with sudden tearing chest pain radiating to the back, hypotensive on the right arm, with a widened mediastinum. The trap answer is "obtain CT angiography before any treatment." The correct next step is stabilize with IV access, blood products, and rate/BP control, then obtain CT angiography if the patient is stable enough; unstable patients go to the OR or get bedside TEE. Rule of thumb: in a hemodynamically unstable patient, the bedside test or the OR beats the scanner.