Medical School MD + DO Mastery

A 4-year, board-aligned study system for medical school and licensing exams.

Walk the full Year 1–4 curriculum — foundational sciences, organ-system blocks, clinical clerkships and advanced practice — each with mastery checklists and linked learning resources, plus a dedicated review system for school exams, Shelf/COMAT, USMLE Step 1–3 and COMLEX-USA Levels 1–3.

EMERGENCY MEDICINE CLERKSHIP

YEAR 3 | PAGE 32E - RESUSCITATION + SHOCK + THE FIRST FIVE MINUTES

WHY THIS CLERKSHIP MATTERS Emergency Medicine rewards sequencing under uncertainty. The learner must identify who is unstable, treat immediately reversible threats before the diagnosis is fully settled, gather only the data that changes the next action, reassess response, and make a

safe disposition decision. The mental model is STABILIZE -> SYNDROME -> DANGEROUS DIFFERENTIAL -> FOCUSED TESTING -> TREAT -> REASSESS -> DISPOSITION. A. THE FIRST-FIVE-MINUTE ED WORKFLOW

StageWhat the student should doOutput
1. Sick or not sick?Use appearance, airway, work of breathing, perfusion, mental status and vital-sign trajectory. Do not let a normal single vital sign overrule a toxic presentation.Immediate acuity statement.
2. ABCDE + monitorAddress airway/breathing/circulation threats as found; attach cardiorespiratory monitoring when appropriate; obtain IV/IO access and bedside glucose early when indicated.Stabilization started before complete diagnosis.
3. Killers firstAsk which immediately reversible threat could explain this presentation: hypoxemia, tension pneumothorax, hemorrhage, malignant arrhythmia, hypoglycemia, opioid toxicity, anaphylaxis, seizure/status, tamponade or massive PE.Short dangerous differential.
4. Focused history/examChief complaint + onset/tempo + high-risk context + medications/exposures + focused exam. Use EMS/family records when the patient cannot provide history.Problem representation with discriminators.
5. Test for actionOrder only tests that change stabilization, probability, treatment or disposition. ECG, pregnancy testing, bedside ultrasound and targeted imaging often alter sequence.Action-linked diagnostic plan.
6. Reassess + dispositionRepeat vitals/exam after intervention. Determine ICU/OR/cath lab/transfer, admission, observation or discharge with explicit follow-up and return precautions.Closed-loop plan + contingency.

B. SHOCK: RECOGNIZE THE PHYSIOLOGY BEFORE THE LABEL

PatternHigh-yield cluesImmediate reasoning
Hypovolemic / hemorrhagicBleeding/trauma/GI loss, flat neck veins, cool skin, narrow pulse pressure; hypotension may be late.Control loss + restore circulating volume/blood; search for source while resuscitating.
DistributiveSepsis, anaphylaxis, neurogenic/toxic causes; warm vasodilated early sepsis can still be profoundly underperfused.Treat cause + perfusion deficit; consider vasopressor support when hypotension persists after appropriate resuscitation.
CardiogenicACS/arrhythmia/acute pump failure; pulmonary edema, JVD, cool extremities, ischemic ECG clues.Avoid reflex large-volume resuscitation; support oxygenation/perfusion and treat the cardiac cause.
ObstructiveTension PTX, tamponade, massive PE; sudden dyspnea/chest pain, JVD or asymmetric lung findings may appear.Relieve the obstruction rapidly; do not wait for confirmatory testing when the bedside syndrome is immediately life-threatening.
Mixed / occultOlder, immunocompromised or medicated patients may have subtle vitals; more than one shock mechanism may coexist.Use response to therapy, POCUS, ECG and repeated exam as new diagnostic data.

C. RESUSCITATION MASTERY CHECK

  • Airway: recognize obstruction/failure; distinguish oxygenation from ventilation; know when escalating support cannot wait.
  • Breathing: immediately recognize tension pneumothorax, severe asthma/COPD, pulmonary edema, anaphylaxis and impending fatigue.
  • Circulation: classify shock physiology, interpret perfusion, identify hemorrhage/arrhythmia and reassess after each intervention.
  • Disability: bedside glucose, seizure/status, focal neurologic deficit, toxic/metabolic causes and rapid mental-status trend.
  • Exposure: trauma, rash, bleeding, infection source, temperature and environmental/exposure clues.

C. RESUSCITATION MASTERY CHECK — DIRECT VIDEO CORE

Geeky Medics - ABCDE Assessment: Sepsis Emergency Simulation (~12 min) Ninja Nerd - Shock | Clinical Medicine (~40 min) Geeky Medics - ABCDE Assessment: Acute Asthma Emergency Simulation 2026/27 clerkship-expanded edition - verify school and official exam updates before testing