AOBEM Emergency Medicine common mistakes
AOBEM Emergency Medicine · Understand the traps and how to avoid them.
Committing to a single diagnosis for a chief complaint and moving to disposition without deliberately listing and ruling out the dangerous alternatives (e.g., anchoring on 'gastroenteritis' in an elderly patient with abdominal pain and no GI symptoms).
Exam vignettes are written to reward the candidate who recognizes the can't-miss diagnosis; under time pressure, the first plausible pattern match feels satisfying and candidates stop generating a differential.
What to do instead
For every vignette, before selecting an answer, write the one or two can't-miss diagnoses for that presentation and confirm the chosen answer accounts for them or that the stem excludes them.
Choosing the most definitive or advanced intervention (e.g., CT, operative consult, thrombolysis) when the question asks for the next immediate step, skipping stabilization.
Candidates conflate 'best test' with 'next action' and are drawn to the most diagnostic-sounding option.
What to do instead
Read the last line of the stem first to identify whether it asks for next step, best test, or definitive management; if it asks for next step, select the stabilizing action.
Missing subtle vital-sign or trend clues embedded in the stem (e.g., narrowing pulse pressure, rising shock index, tachypnea with normal oxygen saturation) and treating the patient as stable.
Candidates scan for the chief complaint and physical exam findings and skim numeric data, especially when the numbers are individually within reference range.
What to do instead
On every question, extract and mentally trend the vitals before reading the answer choices; treat any abnormal or trending value as a deliberate clue.
Applying adult dosing, adult vital-sign thresholds, or adult ECG/imaging criteria to pediatric or pregnant patients in the vignette.
Most training exposure is adult-focused, and the stem may not emphasize age until late in the presentation.
What to do instead
Note the patient's age and pregnancy status in the first pass, then recall weight-based dosing and age-specific normal ranges before evaluating options.
Failing to identify the need for immediate EMS transport or the appropriate destination capability (trauma center, STEMI center, stroke center, pediatric-capable facility) when the scenario is prehospital.
Candidates focus on field interventions and forget that destination decision and transport urgency are separately testable, and they may not recall which capability level each presentation requires.
What to do instead
For any EMS item, explicitly answer three questions: stabilize what first, transport how urgently, and to what destination capability.
Treating the prehospital scope of practice as identical to ED scope, selecting interventions a paramedic or EMT cannot perform or omitting required medical direction/online command contact.
Candidates reason from what they would do in the ED rather than from the licensure level stated or implied in the stem.
What to do instead
Identify the provider level named in the stem, then filter answer choices to that scope and to protocols requiring base-station contact.
Ignoring scene safety, mechanism, or extrication constraints and proceeding directly to clinical management in a prehospital vignette.
Clinical content is more familiar and feels more like 'the answer,' so safety and operational steps get skipped as obvious.
What to do instead
For prehospital items, run a fixed checklist in order: scene safety, number of patients/triage, then clinical care, then transport.
Missing the toxidrome because one expected feature is absent, or attributing findings to a single agent when a co-ingestion or mixed toxidrome is described.
Candidates memorize toxidromes as complete syndromes and abandon the diagnosis when a classic feature is missing, and they under-weight the possibility of multiple agents.
What to do instead
Diagnose by the dominant findings and the most dangerous possible agent, and when the stem mentions multiple substances or an empty pill bottle, screen each option against the possibility of co-ingestion.
Selecting an antidote or enhanced-elimination method without checking the indication, timing window, or contraindication (e.g., alkalinization vs. hemodialysis for a specific alcohol, or N-acetylcysteine timing).
Antidote names are highly memorable and candidates match drug to poison by association rather than by indication and timing.
What to do instead
For each antidote option, state the indication, the time window, and one contraindication; eliminate any option that fails one of the three.
Managing a poisoned patient's airway or seizures without concurrently addressing decontamination, enhanced elimination, or the specific antidote, and missing the observation/boarding period required after ingestion.
Candidates default to supportive care as the 'safe' answer and forget that toxicology items often test the specific intervention plus the disposition decision.
What to do instead
For toxicology items, answer in two parts: the specific therapy and the disposition/observation requirement, then pick the option that captures the more specific of the two.
Describing a somatic dysfunction or selecting an OMT technique without first stating the segmental diagnosis (TART findings, motion restriction direction) that justifies it.
Candidates jump to a familiar technique name and skip the diagnostic reasoning the item is actually testing.
What to do instead
Before choosing a technique, name the segment, the tissue texture and asymmetry findings, and the restricted motion direction; eliminate techniques that do not match that restriction.
Choosing an OMT technique that is contraindicated by the scenario (e.g., high-velocity low-amplitude thrust in a patient with suspected fracture, malignancy, anticoagulation, or unstable spine) or failing to recognize when OMT should be deferred.
Technique recall is stronger than contraindication recall, and the stem's red-flag features may be under-weighted.
What to do instead
Screen every OMT option against absolute contraindications first; if any red flag is present, prefer the option that defers or uses a gentle indirect technique.