Medical Licensing (MD/DO) · Independent exam preparation
American Board of Emergency Medicine Qualifying Examination Study Guide
Practise urgent diagnosis, stabilization and disposition through 60 focused emergency medicine concepts, 20 reasoned questions and 20 active-recall flashcards.
By CertMedbry · Updated 19 October 2026
Practise recognizing dangerous presentations, choosing the next useful test, stabilizing physiologic threats and deciding when definitive treatment cannot wait. This selective guide develops 60 clinical concepts across all 20 ABEM Qualifying Examination domains. Use the official Qualifying Examination specifications and the 2022 Model of the Clinical Practice of Emergency Medicine for the full examination scope; these selected concepts do not replace that outline.
Try 20 free practice questionsWhat is the exam format?
Check the question types, timing and outline before planning your revision.
Which certification examination does this guide cover?
This guide covers the American Board of Emergency Medicine Qualifying Examination, or QE, within initial emergency medicine specialty certification following emergency medicine residency. The board's name identifies the awarding organization. This is a physician specialty certification pathway rather than a general medical licensing examination.
How many questions are there, and what item style is verified?
ABEM describes approximately 305 single-best-answer multiple-choice questions assessing medical knowledge and diagnostic reasoning. That approximate total does not establish a scored-item count or a scored/pretest split. The four-option questions in this guide are independent learning exercises and do not reproduce official examination items.
Where should candidates confirm delivery and testing arrangements?
Consult ABEM's applicable candidate instructions for the testing location, delivery arrangements, total testing duration, breaks and permitted materials. Question count alone does not establish these details or whether an examination uses adaptive delivery.
Which model and blueprint dates apply?
The blueprint checked October 10, 2026 uses the 2022 EM Model, published in June 2023 and implemented for Qualifying Examinations beginning in 2024. ABEM identifies that model as currently used. No separate effective date was stated for the domain-percentage table. The model's publication year therefore does not make it a historical substitute for the applicable outline.
ABEM — EM Model · ABEM — Qualifying Exam · 2022 Model of the Clinical Practice of Emergency Medicine
How is the official content weighted?
The published domain weights are: Signs, Symptoms and Presentations 10%; Abdominal & Gastrointestinal Disorders 7%; Cardiovascular Disorders 10%; Cutaneous Disorders 3%; Endocrine, Metabolic & Nutritional Disorders 5%; Environmental Disorders 2%; Head, Ear, Eye, Nose & Throat Disorders 4%; Hematologic Disorders 3%; Immune System Disorders 2%; Systemic Infectious Disorders 7%; Musculoskeletal Disorders (Non-traumatic) 3%; Nervous System Disorders 6%; Obstetrics and Gynecology 3%; Psychobehavioral Disorders 2%; Renal and Urogenital Disorders 3%; Thoracic-Respiratory Disorders 7%; Toxicologic Disorders 4%; Traumatic Disorders 9%; Procedures & Skills 8%; Other Components 2%.
How do acuity and patient age affect preparation?
ABEM publishes acuity targets of critical 30%, emergent 40%, lower acuity 21% and none 9%, each with a tolerance of ±5 percentage points. Pediatric content has a minimum of 8%, and geriatric content a minimum of 6%. These dimensions cross the clinical domains: prepare to adjust recognition, treatment and disposition for patient age and physiologic severity.
ABEM — Qualifying Exam · 2022 Model of the Clinical Practice of Emergency Medicine
How does the separate Certifying Exam differ?
ABEM's separate Certifying Exam uses Clinical Care Cases and Communication & Procedure Cases. It assesses capabilities including prioritization, communication, procedures, ultrasound and reassessment. This guide addresses the written QE pathway; its independent MCQs are learning drills rather than a simulation of the case-based Certifying Exam.
How should the guide, questions and cards be used?
The 60 concepts and 20 flashcards cover every supplied domain. The 20 questions sample selected clinical decisions, with repeated coverage of several larger domains. These small sets do not reproduce examination percentages or acuity targets. Use explanations to identify reasoning errors and the official outline to find additional topics. Scores on these exercises do not predict a certification result.
ABEM — Qualifying Exam · 2022 Model of the Clinical Practice of Emergency Medicine
An independent educational guide for ABEM's physician specialty Qualifying Examination. Clinical recommendations are supported by the cited clinical references; ABEM sources establish examination scope. The questions and flashcards are original learning exercises.
Outline used: Current ABEM Qualifying Examination blueprint checked 2026-10-10; based on the 2022 Model of the Clinical Practice of Emergency Medicine, published in June 2023 and used for Qualifying Examinations beginning in 2024. The workbook label identifies the awarding board rather than an examination. This resource maps that label to ABEM's written Qualifying Examination and preserves the assigned slug; it does not represent the separate Certifying Exam.
60 key concepts: understand, apply and avoid the traps
Work through the questions by exam domain. Explain the answer in your own words, try the example, then check the common pitfall.
Signs, Symptoms and Presentations10%
1.Which features favor reflex syncope in a child?
Reflex syncope results from transient autonomic changes that reduce cerebral perfusion. Prolonged standing, heat, dehydration or an emotional trigger, followed by lightheadedness and visual dimming, supports this mechanism. Loss of consciousness is usually brief, with prompt recovery of orientation. Establish the sequence before assigning a benign diagnosis, perform a cardiovascular examination and obtain an ECG at least once in children. A typical trigger does not cancel concerning cardiac findings.
Apply it
A teenager becomes nauseated and develops tunnel vision while standing through a warm assembly. She briefly collapses and immediately recognizes her teacher. Assess hydration, orthostatic observations, cardiac examination and ECG before explaining the likely reflex mechanism.
Common pitfall: Calling every adolescent faint vasovagal overlooks cardiac disease. Exertional collapse, preceding palpitations, an abnormal ECG or a family history of sudden death changes the assessment.
2.When does pediatric syncope suggest a cardiac cause?
Collapse during exercise, abrupt loss of consciousness without a typical prodrome, preceding chest pain or palpitations, and a family history of early sudden death raise concern for cardiac syncope. Arrhythmias and structural disease can abruptly reduce cardiac output even when the child appears well afterward. These features warrant cardiac evaluation rather than reassurance based on recovery alone. Distinguish collapse during exertion from a typical faint after prolonged standing.
Apply it
A 15-year-old loses consciousness midway through a sprint without warning. His uncle died unexpectedly at 29. Despite normal current vital signs, obtain an ECG and arrange urgent cardiac assessment rather than routine sports clearance.
Common pitfall: A normal examination after recovery does not exclude an intermittent arrhythmia. Do not use youth, athletic appearance or rapid recovery as evidence of safety.
3.How can brief jerking occur during syncope?
Transient cerebral hypoperfusion can produce brief tonic or myoclonic movements during syncope. Their presence alone does not establish epilepsy. The order of events, duration of unconsciousness, provoking circumstances and recovery are more discriminating. A faint with a standing trigger and immediate orientation differs from an event followed by prolonged confusion. Obtain a witness account that separates movements occurring after collapse from motor activity initiating the episode, while assessing cardiac and metabolic alternatives.
Apply it
A child faints during venipuncture, has two brief jerks and speaks coherently within seconds. Ask the witness about timing and recovery, and evaluate syncope rather than diagnosing epilepsy solely from the observed movements.
Common pitfall: Treating any jerking as a seizure can divert attention from arrhythmia or reflex syncope. Conversely, prolonged post-event confusion should not be dismissed as ordinary fainting.
4.Why check glucose early in an altered child?
The brain depends on an adequate glucose supply, and hypoglycemia can cause behavioral change, confusion, seizures or coma. Bedside glucose testing identifies a rapidly treatable cause while airway, breathing and circulation are assessed. A critically low result with compatible symptoms requires prompt correction; confirmatory testing or an etiologic sample should not delay treatment. Clinical improvement after glucose supports neuroglycopenia but does not establish why the glucose fell or exclude another concurrent illness.
Apply it
A previously interactive toddler becomes lethargic after vomiting overnight. During the initial assessment, bedside glucose is markedly low. Correct the glucose promptly while evaluating perfusion, hydration and the illness responsible for reduced intake.
Common pitfall: Attributing reduced consciousness to fatigue or gastroenteritis before checking glucose misses a reversible threat. A corrected number also does not complete the diagnostic assessment.
5.How should severe pediatric hypoglycemia be corrected?
Treatment route depends on consciousness, swallowing safety and vascular access. For severe pediatric hypoglycemia, the Royal Children's Hospital guideline recommends 10% glucose, 2 mL/kg intravenously. Because 10% glucose contains 0.1 g/mL, this supplies 0.2 g/kg. Reassess glucose and neurologic status, then provide sustained carbohydrate or glucose-containing intravenous fluid. If intravenous access is delayed, consider intraosseous glucose or intramuscular glucagon. Glucagon may be ineffective after prolonged fasting because hepatic glycogen is depleted.
Apply it
A preschool child is seizing with confirmed hypoglycemia and has a functioning intravenous line. Following the RCH regimen, give 10% glucose, 2 mL/kg intravenously, protect the airway and reassess. Continue an appropriate glucose supply once the immediate deficit is corrected.
Common pitfall: Oral carbohydrate is unsafe when swallowing is impaired. Verify glucose concentration and weight-based volume; the RCH regimen supplies 0.2 g/kg and still requires reassessment and sustained substrate.
6.Why can hypoglycemia recur after initial correction?
An initial glucose bolus treats the immediate deficit but may not provide sustained substrate or remove the underlying cause. Continued fasting, ongoing illness or inappropriate insulin activity can produce recurrence. Follow correction with tolerated longer-acting carbohydrate or glucose-containing intravenous fluid when enteral intake is inadequate. Recheck glucose and symptoms, and investigate unexplained, severe or recurrent episodes. Disposition depends on sustained recovery, adequate intake and a credible explanation, rather than a single improved measurement.
Apply it
A toddler becomes alert after intravenous glucose but continues vomiting and refuses food. Continue an appropriate glucose supply and monitor serial measurements while investigating the episode, rather than discharging after the first normal reading.
Common pitfall: A normal glucose immediately after treatment reflects the intervention, not necessarily recovery. Recurrent or unexplained hypoglycemia requires more than advice to eat regularly.
Abdominal & Gastrointestinal Disorders7%
7.What establishes acute pancreatitis, and when is CT indicated?
Diagnose acute pancreatitis when at least two of three findings are present: characteristic persistent epigastric pain, often radiating to the back; serum lipase or amylase at least three times the upper limit of normal; and characteristic pancreatic inflammation on imaging. Typical pain plus a qualifying enzyme elevation establishes the diagnosis without routine confirmatory CT. Reserve CT for diagnostic uncertainty or failure to improve within 48–72 hours after admission. Transabdominal ultrasound evaluates a possible biliary cause.
Apply it
Nonspecific abdominal discomfort with an isolated lipase elevation to 1.5 times the upper limit of normal does not establish pancreatitis. Persistent epigastric pain radiating to the back with lipase five times the upper limit satisfies two criteria. If the pain is characteristic but enzyme elevation is below the diagnostic threshold, characteristic imaging can provide the second criterion.
Common pitfall: A minor enzyme elevation is insufficient diagnostic evidence, but an enzyme value below the threshold does not exclude pancreatitis when the other two criteria are present. Do not order routine admission CT solely to confirm an already established diagnosis.
NIDDK — Symptoms and Causes of Pancreatitis · NIDDK — Diagnosis of Pancreatitis · AJG-Clinical-Guidelines-Highlights-Acute-Pancreatitis-2024-FINAL.pdf
8.Which investigation helps identify gallstone pancreatitis?
Diagnosing pancreatic inflammation and identifying its cause are related but separate tasks. Ultrasound can demonstrate gallstones, while liver and biliary laboratory findings help assess an associated biliary process. CT depicts pancreatic and surrounding structures, and MRCP can evaluate pancreatic and biliary ducts when needed. Select imaging to answer the unresolved question. A patient with a convincing pancreatitis syndrome may still need etiologic assessment even after pancreatic enzyme elevation is established.
Apply it
A patient with pancreatic-type pain and elevated lipase reports prior episodes after meals. Use biliary ultrasound to assess gallstones and review liver tests, rather than treating confirmation of pancreatic inflammation as the end of evaluation.
Common pitfall: Choosing the most detailed scan automatically can miss the actual diagnostic question. Pancreatic inflammation does not establish whether gallstones or another cause triggered it.
9.Why does mesenteric ischemia cause disproportionate pain?
Early mesenteric ischemia injures the bowel mucosa before inflammation reaches the serosa, so severe pain may coexist with limited abdominal tenderness. Atrial fibrillation, vascular disease and low-flow states increase concern. This mismatch should trigger urgent CT angiography and surgical or vascular involvement rather than observation for peritoneal signs. Guarding or rigidity can represent progression to infarction; their absence early is therefore not reassuring when the history suggests threatened intestinal perfusion.
Apply it
A 78-year-old with atrial fibrillation reports sudden severe abdominal pain but has a soft abdomen. Request urgent CT angiography and involve the appropriate surgical team rather than waiting for rigidity to make the diagnosis clearer.
Common pitfall: A benign-looking abdominal examination can be misleading early. Waiting for peritonitis sacrifices the interval during which threatened bowel may still be salvageable.
World Society of Emergency Surgery — Acute Mesenteric Ischemia: Updated Guidelines
10.How should a normal lactate affect suspected intestinal ischemia?
No routine laboratory result reliably excludes early acute mesenteric ischemia. Lactate can rise with advanced tissue injury or systemic hypoperfusion, but a normal value does not establish adequate regional bowel blood flow. Use laboratory tests to assess physiology and complications while pursuing definitive imaging when clinical suspicion is substantial. CT angiography should not be postponed until lactate rises, because the aim is to identify a treatable vascular problem before irreversible intestinal damage develops.
Apply it
An older patient with vascular disease has abrupt abdominal pain, mild tenderness and a normal lactate. Maintain concern for mesenteric ischemia and obtain CT angiography instead of using the laboratory result to justify delayed reassessment.
Common pitfall: Lactate is a physiologic marker, not a reliable early exclusion test for bowel ischemia. Serial laboratory testing cannot substitute for indicated vascular imaging.
World Society of Emergency Surgery — Acute Mesenteric Ischemia: Updated Guidelines
Cardiovascular Disorders10%
11.When does tachycardia require synchronized cardioversion?
A persistent tachyarrhythmia with a pulse that causes hypotension, acute altered mental status, shock, ischemic chest discomfort or acute heart failure requires urgent electrical treatment. Use synchronized cardioversion for synchronizable rhythms, including unstable monomorphic VT. Sustained polymorphic VT requires immediate unsynchronized defibrillation because synchronization is unreliable. Establish that the rhythm is producing instability: sinus tachycardia from hemorrhage requires treatment of hemorrhage. Provide sedation when feasible without delaying a necessary shock.
Apply it
An adult with a regular monomorphic tachyarrhythmia at 190 beats/min becomes confused and hypotensive but retains a pulse. Prepare immediate synchronized cardioversion while supporting circulation. If the rhythm is sustained polymorphic VT, deliver an unsynchronized shock instead.
Common pitfall: Neither a pulse nor the label unstable tachycardia determines shock synchronization by itself. Morphology matters, and sustained polymorphic VT must not wait for reliable synchronization.
AHA 2025 — Adult Tachyarrhythmia With a Pulse Algorithm · AHA 2025 — Adult Advanced Life Support
12.How is stable regular narrow-complex tachycardia approached?
In a stable patient, establish whether a narrow-complex tachycardia is regular and represents an arrhythmia rather than physiologic sinus tachycardia. Vagal maneuvers and then adenosine are appropriate steps for a regular narrow-complex rhythm under the AHA algorithm. Adenosine transiently blocks atrioventricular nodal conduction, potentially interrupting an AV-node-dependent reentry circuit. Continue monitoring and reassess stability throughout; the appearance of shock or other rhythm-related instability changes the treatment pathway.
Apply it
A monitored adult has abrupt palpitations, a regular narrow-complex rhythm at 180 beats/min, normal blood pressure and no ischemic symptoms. After unsuccessful vagal maneuvers, consider adenosine while maintaining readiness to manage deterioration.
Common pitfall: Sinus tachycardia requires treatment of its cause. For stable wide-complex tachycardia, consideration of adenosine is limited to regular monomorphic rhythms; irregular or polymorphic wide-complex rhythms require a different approach.
13.Which early decisions matter when coronary ischemia is suspected?
Chest pressure accompanied by dyspnea, sweating or radiation to an arm or jaw warrants urgent assessment for coronary ischemia. AHA and Red Cross first-aid guidance supports an alert adult with nontraumatic chest pain chewing 162–325 mg aspirin unless contraindicated. Aspirin inhibits platelet aggregation, addressing a mechanism involved in coronary thrombosis. Check for aspirin allergy, relevant bleeding concerns and prior instructions against taking aspirin. Routine supplemental oxygen is not recommended for a nonhypoxic acute coronary syndrome; oxygen treatment should address an actual oxygenation problem.
Apply it
A sweating adult with persistent chest pressure has an oxygen saturation of 98% on room air. Arrange immediate emergency assessment and give aspirin when appropriate, without automatically adding oxygen solely because the pain might be cardiac.
Common pitfall: A normal saturation does not exclude coronary ischemia. Aspirin and symptom improvement also do not establish a diagnosis or remove the need for urgent assessment.
AHA and American Red Cross — 2024 Guidelines for First Aid · 2022 Model of the Clinical Practice of Emergency Medicine
14.Why does sustained polymorphic ventricular tachycardia need an unsynchronized shock?
Polymorphic ventricular tachycardia has continuously changing QRS morphology, making reliable synchronization difficult. Sustained polymorphic VT requires immediate unsynchronized shock treatment rather than waiting for a synchronized marker to capture consistently. This differs from unstable monomorphic tachycardia with a pulse, for which synchronization is used. Assess for a pulse promptly, provide resuscitation as indicated and address the underlying cause after electrical treatment. The morphology determines an important technical distinction in shock delivery.
Apply it
A patient becomes unresponsive during sustained polymorphic ventricular tachycardia. The defibrillator cannot mark QRS complexes reliably. Deliver an unsynchronized shock promptly rather than repeatedly adjusting synchronization while the patient deteriorates.
Common pitfall: Attempting synchronization indefinitely delays effective treatment. The presence of a pulse does not make sustained polymorphic ventricular tachycardia a routine synchronized-cardioversion situation.
15.How does systolic heart failure change emergency treatment tolerance?
Impaired left ventricular systolic function limits tolerance of treatments that increase congestion or depress contraction. For adults with heart failure and DKA, the 2024 consensus recommends cautious fluid replacement using smaller boluses, such as 250 mL, with frequent hemodynamic assessment. For atrial fibrillation with left ventricular systolic dysfunction and decompensated heart failure, AHA guidance advises against diltiazem, verapamil and intravenous beta blockers because they may worsen hemodynamics. The negative inotropic effects of diltiazem and verapamil can further impair ventricular performance.
Apply it
An older adult with known systolic heart failure develops DKA. Use smaller fluid boluses with repeated assessment rather than applying an unrestricted standard fluid sequence. If decompensated heart failure accompanies rapid atrial fibrillation, avoid reflex intravenous diltiazem.
Common pitfall: A need for resuscitation does not establish tolerance of large fluid loads. Distinguish stable chronic heart failure from active decompensation when assessing drug safety.
Hyperglycaemic Crises in Adults With Diabetes: A Consensus Report (2024) · AHA 2025 — Adult Advanced Life Support
16.How does arrest rhythm determine whether to defibrillate?
Ventricular fibrillation and pulseless ventricular tachycardia require prompt defibrillation combined with high-quality CPR. Minimize interruptions and resume compressions immediately after the shock. Pulseless electrical activity and asystole are nonshockable rhythms: provide CPR, give epinephrine as soon as feasible and identify reversible causes. Organized electrical activity without a pulse does not establish mechanical output. Continue rhythm reassessment; defibrillation becomes appropriate if a shockable rhythm develops.
Apply it
A pulseless patient initially has organized narrow complexes. Follow the nonshockable pathway and investigate reversible causes during CPR. If subsequent assessment shows ventricular fibrillation, deliver a shock promptly and resume compressions.
Common pitfall: A shock does not replace CPR, and visible electrical activity does not prove perfusion. Avoid prolonged post-shock pulse checks and routine shocks for PEA or asystole.
Cutaneous Disorders3%
17.Why is drainage central to treating a cutaneous abscess?
A cutaneous abscess is a localized collection of pus requiring evacuation for source control. Incision and drainage addresses the infected cavity directly; antibiotics alone may leave that source intact. Assess surrounding inflammation, systemic illness, host defenses and other risk factors to determine whether adjunctive antimicrobials are needed. Distinguish a drainable purulent collection from diffuse nonpurulent cellulitis, because those presentations require different treatment strategies even when both cause redness and tenderness.
Apply it
A healthy adult has a tender fluctuant skin lesion with visible pus and no systemic illness. Arrange incision and drainage, then assess whether additional antibiotic indications exist rather than prescribing medication without addressing the collection.
Common pitfall: Redness around an abscess can distract from the cavity requiring drainage. Conversely, diffuse cellulitis without a collection should not undergo an unproductive incision.
18.When should a skin infection prompt urgent surgical assessment?
Rapid progression, severe pain disproportionate to visible findings, systemic toxicity, bullae, skin necrosis or crepitus raise concern for necrotizing infection. Deep fascial disease can extend beyond apparently modest surface changes, so superficial appearance may underestimate severity. Obtain prompt surgical consultation and start broad antimicrobial treatment when suspected. Imaging may help selected patients, but it must not delay operative assessment in a clinically compelling presentation. Definitive source control distinguishes this emergency from uncomplicated cellulitis.
Apply it
An adult with diabetes develops rapidly worsening thigh pain, fever and tenderness extending beyond a small erythematous area. Escalate immediately for surgical assessment and broad treatment rather than waiting to judge response to outpatient cellulitis therapy.
Common pitfall: Absence of gas or dramatic necrosis does not exclude early necrotizing infection. Requiring those late findings can delay the source control that determines outcome.
Endocrine, Metabolic & Nutritional Disorders5%
19.How can diabetic ketoacidosis occur without marked hyperglycemia?
The 2024 adult consensus requires all three DKA components: known diabetes or glucose at least 200 mg/dL; beta-hydroxybutyrate at least 3.0 mmol/L or urine ketones at least 2+; and pH below 7.3 or bicarbonate below 18 mmol/L. Insulin deficiency permits ketogenesis even without marked hyperglycemia. Euglycemic DKA has glucose below 200 mg/dL with the required ketosis and acidosis; known diabetes satisfies the first component. SGLT2 inhibitors, reduced intake and pregnancy are recognized settings.
Apply it
An adult with diabetes taking an SGLT2 inhibitor develops vomiting and deep breathing after poor intake. Glucose is 175 mg/dL, beta-hydroxybutyrate 4.2 mmol/L and pH 7.24. These findings satisfy euglycemic DKA criteria despite glucose below 200 mg/dL.
Common pitfall: Glucose alone cannot exclude DKA. Lesser ketosis without qualifying acidosis does not satisfy all three diagnostic components, and an elevated anion gap alone does not establish DKA.
Hyperglycaemic Crises in Adults With Diabetes: A Consensus Report (2024)
20.When must potassium replacement precede insulin in adult DKA?
DKA causes total-body potassium loss even when the initial serum concentration is normal or elevated. Insulin drives potassium into cells, potentially exposing a dangerous deficit. The 2024 adult consensus recommends delaying insulin when potassium is below 3.5 mmol/L and replacing potassium until it rises above 3.5 mmol/L. Begin appropriate fluid treatment and monitor electrolytes and cardiac status. This sequence prevents treatment-induced arrhythmia and respiratory muscle weakness while preparing to suppress ketogenesis.
Apply it
An adult with DKA has potassium 3.1 mmol/L and preserved urine output. Start monitored potassium replacement and appropriate fluids, withholding insulin until potassium exceeds 3.5 mmol/L, then continue frequent electrolyte reassessment.
Common pitfall: Starting insulin reflexively can worsen hypokalemia before ketoacidosis improves. Do not assume a patient with DKA has adequate potassium simply because acidosis is present.
Hyperglycaemic Crises in Adults With Diabetes: A Consensus Report (2024)
21.Which findings establish resolution of adult DKA?
The 2024 consensus defines DKA resolution by plasma ketones below 0.6 mmol/L together with venous pH at least 7.3 or bicarbonate at least 18 mmol/L. Glucose improvement alone is insufficient because ketogenesis can persist after glucose falls. Urine ketones can remain misleading during recovery as beta-hydroxybutyrate converts to acetoacetate. The anion gap can also be distorted by treatment-related hyperchloremic acidosis, so assess the specified biochemical endpoints.
Apply it
During treatment, glucose falls to 160 mg/dL but beta-hydroxybutyrate remains 2.4 mmol/L and venous pH is 7.25. Continue treatment directed at ketoacidosis, with glucose support as needed, rather than declaring resolution from glucose alone.
Common pitfall: Stopping treatment when glucose normalizes leaves ongoing ketoacidosis untreated. Persistently positive urine ketones or a residual anion-gap abnormality also require interpretation rather than automatic treatment extension.
Hyperglycaemic Crises in Adults With Diabetes: A Consensus Report (2024)
Environmental Disorders2%
22.What distinguishes heat stroke from heat exhaustion?
Heat stroke combines severe heat illness with central nervous system dysfunction, such as confusion, seizure or coma. Sweating may still be present, especially during exertional illness, so dry skin is not required. Begin rapid active cooling immediately while supporting airway and circulation. Cool-water immersion provides effective whole-body cooling when feasible; localized ice packs alone cool more slowly. The urgent decision is to remove the heat burden rather than wait for a particular skin appearance.
Apply it
A runner collapses confused after a hot race and remains profusely sweaty. Treat suspected exertional heat stroke with immediate whole-body cooling and emergency support instead of downgrading the illness because sweating continues.
Common pitfall: Sweating does not exclude heat stroke. Antipyretics do not address excessive environmental heat accumulation, and small localized ice packs should not delay effective whole-body cooling.
CDC/NIOSH — Heat-Related Illnesses · AHA and American Red Cross — 2024 Guidelines for First Aid
Head, Ear, Eye, Nose & Throat Disorders4%
23.When should ocular chemical irrigation begin?
Start copious irrigation immediately after a significant ocular chemical exposure because ongoing contact continues tissue injury. Do not postpone irrigation for a detailed history, visual acuity examination or a preferred irrigation solution. Water is appropriate when immediately available. Alkali can penetrate deeply through tissue, making delay especially hazardous. Once irrigation is underway, assess the agent, exposure, ocular pH and examination findings, and obtain ophthalmic assessment according to injury severity.
Apply it
A worker arrives after an alkaline cleaning solution splashes into one eye. Begin irrigation at once using available suitable fluid while assistance obtains the product information; perform the more detailed examination after decontamination has started.
Common pitfall: Completing visual acuity or waiting for specialized fluid before irrigating prolongs chemical contact. Early decontamination is part of treatment, not a step after diagnostic documentation.
American Academy of Ophthalmology EyeWiki — Chemical Injury of the Conjunctiva and Cornea
24.Why can ocular pH become abnormal again after irrigation?
Retained chemical particles in the conjunctival fornices can continue releasing material after the visible surface has been washed. Irrigation therefore needs accompanying inspection, lid eversion and removal of retained particles when appropriate. Recheck ocular pH after a pause to confirm that normalization persists, rather than measuring only during active flow. A transiently normal reading may reflect dilution by irrigation fluid while residual chemical remains in contact with the eye.
Apply it
After irrigation for a cement splash, ocular pH initially normalizes but becomes alkaline again. Reinspect beneath the lids and remove retained particulate material while continuing irrigation, rather than assuming the first normal result completed decontamination.
Common pitfall: Stopping at a single normal pH can leave a continuing chemical reservoir. Irrigation fluid running across the eye may temporarily mask abnormal surface chemistry.
American Academy of Ophthalmology EyeWiki — Chemical Injury of the Conjunctiva and Cornea
Hematologic Disorders3%
25.When does sickle cell disease require reassessment for acute chest syndrome?
New respiratory symptoms or hypoxemia during a sickle cell episode require assessment for acute chest syndrome rather than automatic attribution to pain. Pulmonary complications can intensify sickling and impair oxygen delivery, creating a worsening cycle. Reassess oxygenation, respiratory effort and chest imaging when the clinical condition changes. Severe acute chest syndrome is specifically identified by ASH as a circumstance in which red cell exchange should be considered, making early recognition important for escalation.
Apply it
A patient admitted for sickle cell pain develops increasing oxygen needs and new pulmonary infiltrates. Reassess for acute chest syndrome and involve hematology promptly instead of continuing an unchanged pain-only treatment plan.
Common pitfall: A prior diagnosis of vaso-occlusive pain does not explain new hypoxemia. Repeated analgesia without respiratory reassessment can obscure a developing pulmonary emergency.
ASH — Sickle Cell Disease Clinical Practice Guidelines: What You Should Know
26.Why consider red cell exchange in severe acute chest syndrome?
Red cell exchange removes a portion of the patient's sickling erythrocytes while replacing them with donor red cells. This differs from simple transfusion, which adds cells without directly removing the existing sickling population. ASH identifies severe acute chest syndrome as an indication to consider exchange. Rapidly worsening respiratory compromise should therefore prompt urgent coordination with hematology and transfusion services, alongside respiratory support, rather than waiting for supportive measures alone to reverse deterioration.
Apply it
A patient with sickle cell disease and acute chest syndrome develops escalating hypoxemia despite initial treatment. Begin urgent planning for red cell exchange with the specialist and blood bank teams while continuing respiratory stabilization.
Common pitfall: Exchange is not routine for every uncomplicated pain crisis. Conversely, waiting for profound anemia before considering it overlooks the severity of the pulmonary complication.
ASH — Sickle Cell Disease Clinical Practice Guidelines: What You Should Know
Immune System Disorders2%
27.Why is intramuscular epinephrine first-line treatment for anaphylaxis?
Anaphylaxis can rapidly cause airway swelling, bronchospasm and circulatory collapse. Intramuscular epinephrine addresses these threats through vasoconstriction, cardiac support and bronchodilation. Give it promptly when anaphylaxis is recognized, with repeat assessment and further treatment for persistent airway, breathing or circulation problems. Antihistamines can address skin symptoms but do not reverse shock or dangerous airway compromise. Skin findings may be absent, so the decision must reflect the systemic reaction.
Apply it
Minutes after food exposure, an adult develops wheeze, hoarseness and hypotension. Give intramuscular epinephrine immediately while supporting airway and circulation, rather than beginning with an antihistamine and waiting to see whether symptoms settle.
Common pitfall: Urticaria severity does not measure anaphylaxis severity. Antihistamines and corticosteroids must not displace prompt epinephrine when airway, breathing or circulation is compromised.
Resuscitation Council UK — Emergency Treatment of Anaphylaxis (2021)
Systemic Infectious Disorders7%
28.Which vasopressor is first line for typical adult septic shock?
Norepinephrine is the first-line vasopressor for adult septic shock in the Surviving Sepsis Campaign guidance. Its vasoconstrictor effect counters the loss of vascular tone that contributes to inadequate perfusion pressure. Use it within resuscitation that also addresses infection, intravascular volume and source control. Reassess the hemodynamic phenotype: documented cardiac dysfunction or persistent hypoperfusion despite adequate pressure may require additional decisions. A rising blood pressure alone does not establish restored tissue perfusion.
Apply it
An older adult with pneumonia remains hypotensive after initial fluid resuscitation and has no evidence of primary pump failure. Begin norepinephrine while continuing infection treatment and serial perfusion assessment rather than choosing dopamine routinely.
Common pitfall: Vasopressors do not replace antimicrobial treatment or source control. A satisfactory pressure reading can coexist with ongoing hypoperfusion and requires clinical reassessment.
29.How should further fluid be assessed during sepsis resuscitation?
After initial resuscitation, additional fluid should reflect the patient's response rather than an automatic sequence of boluses. Dynamic assessment, such as a passive leg raise with measurement of stroke-volume response, helps determine whether added preload increases cardiac output. Integrate perfusion findings, respiratory tolerance and serial lactate trends. The Surviving Sepsis Campaign cautions against continuing fluid solely until lactate normalizes; persistent lactate elevation does not prove that more intravascular volume will help.
Apply it
A septic patient remains poorly perfused after initial fluids but now has increasing respiratory difficulty. Assess dynamic fluid responsiveness and the need for vasoactive support instead of repeatedly administering fluid just because lactate remains elevated.
Common pitfall: Hypotension and elevated lactate do not automatically mean fluid responsiveness. Additional fluid can add congestion without increasing cardiac output when the circulation will not respond.
30.When are droplet precautions needed for meningococcal disease?
Suspected or confirmed meningococcal disease requires droplet precautions in addition to standard precautions. Respiratory secretions can transmit the organism during close contact, making early precautions important before diagnostic confirmation. CDC guidance maintains droplet precautions until 24 hours after effective antimicrobial therapy begins. Isolation and treatment serve different purposes: protect others promptly while the clinical team treats the patient's invasive infection. A pending culture is not a reason to postpone transmission precautions.
Apply it
A febrile patient with meningismus and a concerning purpuric rash arrives in the emergency department. Apply standard and droplet precautions immediately while urgent assessment and treatment proceed, rather than waiting for a positive culture.
Common pitfall: Delaying precautions until microbiologic confirmation creates preventable exposure. Routine standard precautions alone do not replace droplet measures for suspected invasive meningococcal disease.
31.Which occupational contacts warrant meningococcal exposure assessment?
Exposure assessment focuses on unprotected direct contact with a patient's respiratory secretions, such as during airway management, suctioning or mouth-to-mouth resuscitation. Merely entering the room or providing routine care without secretion exposure is generally not equivalent. CDC recommends postexposure prophylaxis for qualifying healthcare personnel exposures regardless of vaccination status. Clarify the task, protective equipment and secretion contact promptly so a meaningful exposure receives timely management without treating every nearby worker as exposed.
Apply it
A clinician performs emergency airway suctioning without appropriate facial protection before meningococcal disease is recognized. Arrange prompt occupational exposure assessment and prophylaxis consideration; a colleague who only delivered supplies has a different exposure history.
Common pitfall: Job title or time spent nearby does not define exposure. Conversely, prior vaccination does not remove the need to assess unprotected contact with respiratory secretions.
Musculoskeletal Disorders (Non-traumatic)3%
32.When should a swollen pediatric joint be treated as an orthopedic emergency?
A child with acute joint pain, restricted movement, fever or refusal to bear weight requires assessment for septic arthritis. Infection within a joint can rapidly damage cartilage and may require operative drainage and antimicrobial treatment. Marked pain with passive movement and systemic illness increase concern. The Royal Children's Hospital identifies septic arthritis as an orthopedic emergency; a reassuring explanation such as transient synovitis should only follow assessment of the child's overall condition and red flags.
Apply it
A febrile six-year-old refuses to walk and resists passive movement of a swollen knee. Arrange urgent pediatric and orthopedic assessment for possible septic arthritis rather than giving a presumptive benign diagnosis based on age.
Common pitfall: A child need not display every classic feature to have joint infection. Do not let a mild skin appearance outweigh severe movement restriction or systemic illness.
33.How should an uncertain diagnosis affect discharge after acute joint swelling?
Discharge after acute pediatric joint swelling requires more than the absence of a definitive diagnosis. First exclude urgent causes through the history, examination and indicated assessment. The child should have adequate pain control and a clear follow-up plan; an unclear diagnosis warrants early review. Reassess gait, function and systemic features after treatment. Persistent inability to bear weight, uncontrolled pain or concern for infection argues against assuming that improvement will occur safely at home.
Apply it
An afebrile child with a swollen ankle still cannot bear weight after analgesia, and the diagnosis remains uncertain. Reassess for urgent pathology and arrange further evaluation rather than discharging solely because fever is absent.
Common pitfall: Absence of fever is not a discharge criterion by itself. An uncertain diagnosis needs explicit follow-up, and persistent major functional limitation deserves renewed assessment.
Nervous System Disorders6%
34.Which patients are eligible for the Ottawa Subarachnoid Hemorrhage Rule, and what makes it positive?
The validation population comprised alert patients aged at least 16 years, with GCS 15 and a normal neurologic examination, presenting within 14 days of a new severe nontraumatic headache reaching maximum intensity within one hour. ACEP's recommendation has an adult-policy scope. Any of six findings makes the rule positive: age at least 40 years, neck pain or stiffness, witnessed loss of consciousness, exertional onset, instantly peaking thunderclap headache, or limited neck flexion. A positive result calls for SAH investigation; it does not establish hemorrhage.
Apply it
A neurologically intact 46-year-old presents two days after a first severe exertional headache that peaked within minutes. Age and exertional onset make the rule positive despite a normal examination. In contrast, new unilateral weakness places a patient outside the rule's intended population and requires urgent direct evaluation.
Common pitfall: Do not apply the rule to established recurrent similar headaches, previous aneurysm or SAH, brain tumor, new neurologic deficits, papilledema, hydrocephalus or a ventricular shunt. Recurrent-headache exclusion includes at least three similar episodes over more than six months. A negative result outside the validated population cannot exclude SAH; even within it, the rule does not exclude other dangerous headache causes.
35.How do CT timing and residual risk determine further SAH testing?
ACEP's 2019 policy supports a normal noncontrast head CT within six hours of headache onset to exclude nontraumatic SAH in an adult with a normal neurologic examination, using appropriate scan quality and reliable interpretation. Measure time from symptom onset, not arrival. If the scan is later, onset is uncertain or meaningful concern persists, further evaluation with lumbar puncture or CTA is appropriate. Discuss traumatic or inconclusive lumbar puncture results and incidental vascular findings on CTA. A negative SAH assessment does not exclude every dangerous headache cause.
Apply it
A neurologically intact adult has a negative CT ten hours after an exertional thunderclap headache. Discuss and complete further evaluation with lumbar puncture or CTA because this is outside the early-CT scenario and concern remains.
Common pitfall: Analgesic response and a normal neurologic examination do not independently exclude SAH. A CT obtained promptly after arrival may still be late relative to onset.
36.Which findings require immediate stroke-system activation?
Sudden facial weakness, arm weakness or speech disturbance warrants immediate stroke-system activation because an acute cerebrovascular event can cause rapidly evolving focal brain dysfunction. Record symptom onset or the last time the patient was known to be at baseline, and check glucose promptly because hypoglycemia can mimic stroke. Perform these tasks alongside urgent assessment rather than waiting for every historical detail before activating care. Recognition tools organize screening, but they do not establish the stroke subtype or replace neurologic evaluation.
Apply it
An adult abruptly develops aphasia and right arm weakness while speaking with family. Activate the stroke pathway, establish the witnessed onset time and obtain bedside glucose while assessing airway, breathing and circulation.
Common pitfall: A normal glucose removes one mimic without excluding stroke. Adult recognition scales should not be used as the sole screening method in children, and an incomplete classic pattern does not justify dismissing sudden neurologic dysfunction.
AHA and American Red Cross — 2024 Guidelines for First Aid · 2022 Model of the Clinical Practice of Emergency Medicine
37.When should convulsive status epilepticus treatment begin, and how should therapy escalate?
Treat ongoing convulsions reaching five minutes, or recurrent convulsions without recovery, as convulsive status epilepticus. Immediately support airway, breathing and circulation, monitor vital signs, and check bedside glucose; promptly correct hypoglycemia. Give an adequately dosed benzodiazepine: IV lorazepam 0.1 mg/kg, maximum 4 mg, or IM midazolam 10 mg for an adult weighing more than 40 kg without IV access. IV lorazepam may be repeated once if needed. Persistent seizures require IV loading with fosphenytoin, valproate or levetiracetam. Failure of second-line therapy requires critical care escalation, continuous EEG and consideration of anesthetic therapy.
Apply it
A 70-kg adult has two generalized convulsions without regaining consciousness and is convulsing again. While supporting ventilation and checking glucose, give IM midazolam 10 mg immediately if IV access is unavailable, then prepare escalation if seizures persist.
Common pitfall: Do not delay available IM treatment while attempting IV access. A pause in movements without recovery does not reset treatment urgency. Protect against injury without restraining limbs or placing objects in the mouth.
AHA and American Red Cross — 2024 Guidelines for First Aid · 2022 Model of the Clinical Practice of Emergency Medicine · aesconvulsivestatusepilepticus.pdf
Obstetrics and Gynecology3%
38.When does ectopic pregnancy require emergency surgery?
A ruptured ectopic pregnancy can cause rapid intra-abdominal hemorrhage and shock. Severe abdominal pain, collapse, hypotension and evidence of internal bleeding require immediate resuscitation and emergency gynecologic surgery. Methotrexate and expectant management are options only for appropriately selected stable, unruptured cases with follow-up. The urgent distinction is threatened circulation and rupture, not whether a particular pregnancy hormone threshold has been reached. Do not delay hemorrhage control to complete a routine outpatient diagnostic sequence.
Apply it
A patient with a positive pregnancy test develops severe pelvic pain, syncope and hypotension, with free intraperitoneal fluid on bedside assessment. Activate emergency gynecologic care and resuscitation rather than pursuing methotrexate eligibility.
Common pitfall: A low hormone concentration does not make clinical shock safe to observe. Medical treatment cannot provide immediate control of bleeding from a ruptured ectopic pregnancy.
39.Why is follow-up essential after methotrexate for ectopic pregnancy?
Methotrexate stops pregnancy tissue from growing but does not guarantee immediate resolution. Selected patients require serial pregnancy hormone testing until the treating service confirms successful treatment; additional medication or surgery may become necessary. Rupture remains possible during follow-up, so new severe pain, dizziness or collapse requires urgent reassessment. Explain both the testing plan and warning symptoms before treatment. A single injection should not be presented as the completion of care.
Apply it
A stable patient treated with methotrexate feels better and asks to cancel blood tests. Explain why biochemical follow-up remains necessary and why new severe pain or fainting requires emergency assessment despite earlier improvement.
Common pitfall: Symptom improvement does not establish that all ectopic tissue has resolved. Missing follow-up can delay recognition of treatment failure or a subsequent rupture.
Psychobehavioral Disorders2%
40.How should suicide risk tools influence disposition?
Suicide risk scores cannot independently identify every patient who can safely leave the emergency department. ACEP recommends assessment incorporating clinical judgment and patient, family and community factors rather than relying on a tool alone. Evaluate current intent, access to means, recent behavior, psychiatric and substance-related features, available support and the safety of the discharge environment. A structured tool can organize questioning, but disposition requires an individualized explanation of risk and the proposed safety arrangements.
Apply it
An adult receives a low screening score but describes obtaining a weapon after a recent suicidal crisis. Continue comprehensive assessment and safety measures instead of allowing the numerical result to determine discharge.
Common pitfall: A low score is not clearance for discharge, and a verbal denial is not the whole assessment. Collateral information and concrete recent behavior can change risk substantially.
ACEP — Clinical Policy on the Adult Psychiatric Patient (2017)
Renal and Urogenital Disorders3%
41.Why is infection behind an obstructing urinary stone an emergency?
An obstructed collecting system with infection is a source-control emergency because impaired drainage allows infected urine to remain under pressure. Sepsis requires urgent decompression with a ureteral stent or percutaneous nephrostomy, together with immediate antimicrobial treatment and cultures. Antibiotics alone do not relieve the obstruction. Recognize the combination of systemic illness and obstruction rather than treating the presentation as uncomplicated renal colic. Rapid coordination with urology or interventional services is essential.
Apply it
A patient with fever, hypotension and a ureteral stone has hydronephrosis. Begin sepsis treatment and arrange urgent urinary drainage rather than prescribing antibiotics and waiting for spontaneous stone passage.
Common pitfall: A small stone can still obstruct an infected system. Stone diameter does not override sepsis, and analgesic improvement does not remove the need for drainage.
European Association of Urology — Guidelines on Urolithiasis
42.When should definitive stone removal follow emergency drainage?
In sepsis associated with an obstructing stone, emergency drainage and definitive stone removal are separate stages. EAU guidance recommends delaying definitive stone treatment until sepsis has resolved. Initial stenting or nephrostomy establishes drainage while antimicrobials address infection; it does not necessarily eliminate the stone. After stabilization, plan definitive management and device follow-up. Distinguishing these stages prevents a technically attractive stone procedure from displacing the immediate goal of safe source control.
Apply it
After urgent nephrostomy for septic obstruction, a patient's blood pressure improves. Explain that drainage treated the emergency but that stone management and tube follow-up still need a coordinated plan after infection resolves.
Common pitfall: Improvement after decompression does not mean the stone has disappeared. Conversely, performing definitive stone manipulation during uncontrolled sepsis can confuse emergency drainage with later treatment.
European Association of Urology — Guidelines on Urolithiasis
Thoracic-Respiratory Disorders7%
43.Which pulmonary embolism findings favor hospitalization?
Pulmonary embolism disposition depends on physiologic severity and risk of deterioration, not simply clot confirmation. The 2026 AHA guideline identifies higher-risk features, including elevated clinical severity, right ventricular dysfunction, elevated cardiac biomarkers or cardiopulmonary failure, as reasons for hospital care. Normotension alone does not establish low risk. Integrate hemodynamics, oxygenation, ventricular assessment and the patient's clinical context before deciding whether outpatient treatment is appropriate.
Apply it
A normotensive adult with confirmed PE has right ventricular dysfunction and elevated cardiac biomarkers. Arrange hospitalization and monitoring rather than assuming normal blood pressure makes outpatient anticoagulation appropriate.
Common pitfall: Stable blood pressure is only one risk dimension. Right ventricular injury and other severity findings can identify a patient who needs monitored care before hypotension develops.
AHA — 2026 Acute Pulmonary Embolism Guideline: Top Things to Know
44.When are direct oral anticoagulants preferred for pulmonary embolism?
The 2026 AHA pulmonary embolism guidance favors direct oral anticoagulants over vitamin K antagonists in patients eligible for oral anticoagulation, unless contraindicated. Eligibility is a clinical determination, requiring review of organ function, drug interactions and relevant patient circumstances. This preference addresses anticoagulant selection; it does not independently determine suitability for discharge or replace emergency treatment of cardiopulmonary failure. Separate the decisions about drug choice, immediate stabilization and location of care.
Apply it
A patient with PE is ready for an oral anticoagulation plan and has no identified contraindication to a direct oral agent. Consider that class preferentially while independently confirming the appropriate care setting and follow-up arrangements.
Common pitfall: A preferred drug class is not universally suitable. It also does not establish outpatient eligibility for a patient whose embolism has higher-risk clinical features.
45.Why can a quiet chest signal life-threatening pediatric asthma?
Wheeze requires airflow, so extreme obstruction may produce little audible wheezing despite severe disease. A quiet chest accompanied by poor air entry, exhaustion, altered consciousness or weak respiratory effort indicates possible impending respiratory collapse. Judge severity from the child's overall appearance, work of breathing and ventilation rather than sound intensity alone. Urgently escalate respiratory support and experienced assistance while continuing emergency asthma treatment. A quieter examination is improvement only when the broader physiology improves.
Apply it
A child initially wheezes loudly but later becomes drowsy with minimal air entry and less chest movement. Treat this as deterioration and summon advanced respiratory support rather than documenting improvement because wheezing has diminished.
Common pitfall: Less wheeze can mean less airflow rather than less obstruction. Supplemental oxygen may improve saturation without correcting respiratory muscle fatigue or inadequate ventilation.
46.How should treatment response guide pediatric asthma discharge?
Discharge requires sustained clinical improvement rather than a brief response immediately after a bronchodilator. Reassess activity, work of breathing, air entry, oral intake and the ability to tolerate spacing of reliever therapy. Caregiver competence, access to emergency care, inhaler technique, an updated action plan and follow-up also matter. Persistent oxygen requirement, poor bronchodilator response or escalating support argues for continued care. A single saturation measurement cannot summarize the child's readiness to leave.
Apply it
A child appears comfortable immediately after treatment but needs another reliever soon afterward and remains unable to drink comfortably. Continue assessment and treatment rather than basing discharge on the short period of improved wheezing.
Common pitfall: Immediate post-treatment improvement may not persist. Discharge education and access to care matter, but they cannot compensate for unresolved physiologic severity or frequent reliever need.
Toxicologic Disorders4%
47.How should carbon monoxide poisoning be assessed and treated?
Conventional pulse oximetry cannot reliably distinguish carboxyhemoglobin from oxyhemoglobin, so a normal displayed saturation does not exclude carbon monoxide poisoning. Start high-concentration oxygen and measure carboxyhemoglobin by CO-oximetry when exposure and symptoms fit. Time since exposure and oxygen treatment can lower the measured concentration. CDC advises considering hyperbaric oxygen for serious neurologic impairment, loss of consciousness, cardiac involvement, severe acidosis or markedly elevated carboxyhemoglobin; pregnancy warrants particular consideration. Clinical severity must guide interpretation rather than the concentration alone.
Apply it
Two family members develop headache after generator exposure despite saturations of 99%. Begin high-concentration oxygen and obtain CO-oximetry. If one had syncope or cardiac symptoms, assess injury and discuss hyperbaric treatment while continuing oxygen.
Common pitfall: Neither normal pulse oximetry nor a modest delayed carboxyhemoglobin measurement excludes significant poisoning. Do not postpone ordinary oxygen while arranging hyperbaric assessment.
48.What takes priority in opioid-associated respiratory arrest?
In an unresponsive adult with suspected opioid poisoning, assess breathing and check for a definite pulse for no more than 10 seconds. With a definite pulse but absent or ineffective breathing, provide ventilation at one breath every six seconds, producing visible chest rise, and administer naloxone. If no definite pulse is present, begin CPR and use the arrest pathway. Naloxone administration must not delay ventilation or compressions. Reassess breathing and circulation rather than waiting for the patient to become fully awake.
Apply it
An adult is apneic after suspected opioid use but has a definite pulse. Start bag-mask ventilation immediately and give naloxone. If the pulse cannot be definitely identified promptly, initiate CPR.
Common pitfall: An antidote does not provide oxygen delivery while it takes effect. Distinguish respiratory arrest with circulation from cardiac arrest when selecting breaths alone versus CPR.
AHA 2025 — Adult Basic Life Support · 2022 Model of the Clinical Practice of Emergency Medicine
Traumatic Disorders9%
49.When should traumatic tension pneumothorax be decompressed?
Tension pneumothorax causes progressively impaired ventilation and venous return as pressurized pleural air compromises the chest circulation. In a deteriorating trauma patient with compatible unilateral chest findings and shock, perform emergency decompression without waiting for radiography. The diagnosis is clinical in this setting. Decompression is followed by definitive pleural drainage and reassessment. The relevant threshold is physiologic compromise from suspected tension, rather than proof of every traditional textbook sign.
Apply it
After blunt chest trauma, an adolescent develops severe respiratory distress, hypotension and markedly reduced breath sounds on one side. Decompress immediately using an appropriate emergency technique, then establish definitive drainage rather than transporting for imaging.
Common pitfall: Tracheal deviation and other classic signs may be absent or late. A rapidly deteriorating patient should not wait for a chest radiograph to confirm suspected tension.
Royal Children's Hospital — Thoracocentesis and Chest Drain Insertion
50.Where should a pelvic binder be positioned?
A pelvic binder should be centered over the greater trochanters to compress the pelvic ring effectively. Positioning it over the iliac crests or abdomen reduces its mechanical usefulness. Apply it when an unstable pelvic injury with hemorrhage is suspected, alongside resuscitation and definitive hemorrhage-control planning. The binder is a temporary stabilization measure, not proof that bleeding has stopped. Check placement and reassess physiology rather than repeatedly manipulating the pelvis to test instability.
Apply it
A hypotensive patient after a high-energy collision has suspected pelvic ring disruption. Place the binder over the greater trochanters, verify its location and continue hemorrhage resuscitation instead of tightening it around the waist.
Common pitfall: A high binder can look secure while failing to stabilize the intended ring. Correct placement does not eliminate the need to identify ongoing bleeding.
ACS TQIP — Best Practices in the Management of Orthopedic Trauma
51.Why continue searching for hemorrhage after identifying a pelvic fracture?
Major trauma can produce several simultaneous bleeding sources. A pelvic fracture may explain shock, but it does not exclude thoracic, abdominal, external or other injuries. Continue the primary assessment and reassess the response to resuscitation while arranging pelvic hemorrhage control. ACS orthopedic trauma guidance emphasizes concurrent injury assessment. Failure to improve after stabilization should trigger renewed evaluation rather than increasingly confident attribution of all blood loss to the first visible fracture.
Apply it
A patient remains hypotensive after appropriate pelvic binder placement and blood resuscitation. Reassess the chest, abdomen, external bleeding and other injuries while advancing pelvic hemorrhage management instead of assuming the binder has addressed every source.
Common pitfall: An impressive pelvic radiograph can anchor the entire resuscitation. Multiple injuries can coexist, and persistent shock demands a search for additional or uncontrolled hemorrhage.
ACS TQIP — Best Practices in the Management of Orthopedic Trauma
52.Why should antibiotics be given promptly for an open fracture?
An open fracture exposes injured bone and surrounding tissues to contamination, creating an infection risk that requires early antimicrobial prophylaxis and operative planning. Cover the wound with a sterile dressing, assess neurovascular status and arrange orthopedic management. The ACS TQIP guidance supports prompt intravenous antibiotics rather than waiting for operative debridement. Antibiotic selection depends on injury severity, contamination and patient factors; medication reduces infection risk but does not replace debridement or stabilization.
Apply it
A patient has a tibial fracture with an overlying wound communicating with the fracture. Apply a sterile dressing, document distal function and start appropriate intravenous antibiotics promptly while arranging surgery rather than waiting for the operating room.
Common pitfall: A small wound can still represent an open fracture. Antibiotics are time-sensitive, but they do not make definitive wound assessment and operative management unnecessary.
ACS TQIP — Best Practices in the Management of Orthopedic Trauma
53.Which early findings suggest acute compartment syndrome?
Rising pressure within a closed fascial compartment impairs tissue perfusion. Escalating pain disproportionate to the injury, pain with passive muscle stretch and paresthesias are concerning early findings. Pulses may remain present because microvascular compromise precedes loss of major arterial flow. Obtain urgent surgical assessment; pressure measurement can help when examination is unreliable. Do not wait for paralysis or pulselessness, which are late findings and may never appear before substantial tissue injury.
Apply it
After a tibial fracture, a patient develops increasing pain despite analgesia and severe discomfort with passive toe movement. Distal pulses remain palpable. Seek immediate surgical reassessment rather than using the pulses to exclude compartment syndrome.
Common pitfall: Palpable pulses do not prove adequate compartment perfusion. Escalating analgesic requirements should trigger reassessment, not simply a stronger prescription without another examination.
ACS TQIP — Best Practices in the Management of Orthopedic Trauma
54.When does a pediatric supracondylar fracture need immediate reduction?
A displaced supracondylar humeral fracture can compromise brachial arterial flow and threaten the hand. A poorly perfused distal extremity requires urgent reduction and orthopedic management, followed by reassessment of perfusion and nerve function. Persistent ischemia after reduction requires further operative evaluation. Distinguish a cold, poorly perfused hand from a warm, well-perfused but pulseless hand, which requires specialist assessment rather than an identical automatic response. Document findings before and after intervention.
Apply it
A child with a displaced elbow fracture has a pale, cool hand and delayed capillary refill. Arrange immediate orthopedic reduction and reassess circulation afterward rather than waiting for routine fracture-clinic follow-up.
Common pitfall: The fracture image does not describe distal perfusion. A pulse finding must be interpreted with hand warmth, color and capillary refill, with repeated examination after reduction.
ACS TQIP — Best Practices in the Management of Orthopedic Trauma
Procedures & Skills8%
55.How should endotracheal tube placement be confirmed and monitored?
Continuous waveform capnography, together with clinical assessment, is the preferred method for confirming and monitoring an endotracheal tube. Sustained exhaled carbon dioxide supports tracheal ventilation and ongoing monitoring can identify displacement. Chest movement, auscultation and tube misting are less reliable alone. During cardiac arrest, very low pulmonary blood flow can reduce the signal, so absent carbon dioxide demands immediate reassessment of tube position, equipment and perfusion rather than an unexamined single-cause assumption.
Apply it
After intubation, chest movement appears symmetric but no sustained capnographic waveform develops. Immediately reassess tube position, ventilation equipment and circulation rather than accepting auscultation alone as confirmation or waiting for a radiograph.
Common pitfall: Initial visual placement is not ongoing confirmation. Loss of a previously sustained waveform can signal displacement, circuit failure or a major perfusion change and requires prompt assessment.
56.Which compression rate and depth support effective adult CPR?
Adult chest compressions should be delivered at 100–120 per minute with a depth of at least 5 cm, while avoiding excessive depth greater than 6 cm. These targets balance forward blood flow against ineffective shallow compression and injury from excessive force. Rate and depth must be assessed together: moving faster can reduce depth or recoil. Use feedback when available and change compressors when fatigue threatens quality, while keeping interruptions brief.
Apply it
During adult CPR, a feedback device reports 135 compressions/min with a depth of 3.5 cm. Coach the compressor toward the recommended rate and adequate depth rather than praising the rapid pace as evidence of effective circulation.
Common pitfall: Faster is not always better, and movement alone does not establish adequate depth. Excessive depth also lies outside the recommended adult compression target.
57.Why do recoil and ventilation affect CPR-generated circulation?
Complete chest recoil permits venous return between compressions, whereas leaning on the chest maintains pressure that impedes refilling. Excessive ventilation similarly raises intrathoracic pressure and can reduce blood return to the heart. High-quality CPR therefore includes full recoil, minimal interruptions and avoidance of excessive breaths, in addition to correct rate and depth. Once an advanced airway is present during adult arrest, provide controlled ventilation without repeatedly stopping continuous chest compressions.
Apply it
An intubated arrest patient receives rapid bagging while the compressor leans between strokes. Correct ventilation frequency and chest recoil together, because both behaviors can reduce effective circulation despite an apparently energetic resuscitation.
Common pitfall: More breaths do not necessarily deliver more useful oxygen during arrest. Excessive ventilation and leaning can undermine the blood flow needed to transport oxygen.
AHA 2025 — Adult Basic Life Support · AHA 2025 — Adult Cardiac Arrest Algorithm
58.Which ultrasound findings support cardiac tamponade?
A pericardial effusion becomes tamponade when pressure impairs cardiac filling and output. In a patient with shock, an effusion accompanied by right ventricular diastolic collapse supports a hemodynamically important process requiring urgent intervention. Fluid volume alone is insufficient because the rate of accumulation affects pericardial pressure. Integrate ultrasound with circulation and clinical context. An incidental effusion in a stable patient does not carry the same implication as chamber compression during shock.
Apply it
A hypotensive patient has a pericardial effusion with right ventricular diastolic collapse on bedside ultrasound. Escalate for urgent drainage planning and circulatory support rather than classifying the finding as harmless fluid around the heart.
Common pitfall: An effusion is an anatomic finding; tamponade is a physiologic consequence. Neither effusion size alone nor an isolated image should replace assessment of hemodynamic impact.
59.How should ultrasound guide a pericardiocentesis approach?
Ultrasound helps select an accessible fluid pocket and a needle trajectory that avoids intervening structures. The safest approach is not automatically a traditional fixed entry point; it depends on where fluid lies closest to the surface and can be reached safely. Maintain visualization of the needle tip rather than assuming the visible shaft identifies its leading end. Procedural planning must account for lung, liver, cardiac structures and nearby vessels while the team continues resuscitation.
Apply it
A patient needs urgent drainage of tamponade. Ultrasound shows an accessible apical pocket with a safer visible trajectory than the subxiphoid route. Choose the image-guided path and track the needle tip rather than following habit alone.
Common pitfall: A familiar landmark does not guarantee the safest route for this patient. Seeing part of a needle is insufficient if its tip cannot be identified.
Other Components2%
60.What makes informed consent a meaningful clinical process?
Informed consent requires assessment of the patient's ability to understand and decide, explanation of the diagnosis and proposed intervention, and discussion of relevant benefits, burdens, risks and alternatives, including foregoing treatment. Invite questions and confirm understanding before obtaining voluntary authorization. Documentation records the process but does not replace it. When urgent treatment is necessary and the patient cannot participate and no surrogate is available, emergency care may proceed under the ethical emergency exception.
Apply it
Before a nonemergent procedure, a patient can repeat the benefits but misunderstands a major risk. Clarify the misunderstanding and reassess understanding before seeking authorization instead of treating a signed form as sufficient consent.
Common pitfall: A signature does not establish comprehension or voluntariness. Disagreement with the clinician also does not, by itself, prove that the patient lacks decision-making ability.
What to focus on during revision
The following are CertMedbry study suggestions. Use the official outline to check the full scope of your examination.
- Prioritize presentations, cardiovascular disorders, trauma and procedures while tracking gaps against all 20 official domains.
- Identify the cue that changes immediate management: rhythm-related instability, threatened ventilation, hemorrhage, infected obstruction or another source-control emergency.
- Interpret reassuring findings within their limits: normal lactate, pulse oximetry, palpable distal pulses and a negative later head CT do not exclude every dangerous diagnosis.
- Practise pediatric and geriatric presentations across domains, including atypical severity cues and the effect of age on risk.
- Separate initial stabilization, diagnostic confirmation, definitive treatment and disposition; explain what each intervention accomplishes.
- Use the official EM Model to extend beyond this selection into the remaining cardiovascular, neurologic, toxicologic, obstetric and procedural topics.
A practical preparation plan
1. Map coverage to the official outline
Create a study record using ABEM's 20 domain names and published percentages. Mark these 60 concepts as selected coverage, then identify additional conditions and procedures in the full EM Model rather than treating the selection as a complete syllabus.
2. Explain the decisive clinical cue
For each concept, state the mechanism, the finding that changes management and the tempting alternative. Practise aloud with paired distinctions such as stable versus unstable tachycardia, simple abscess versus necrotizing infection, and uncomplicated colic versus septic obstruction.
3. Complete the independent question set
Answer all 20 questions before reading the explanations. For each miss, classify the error as recognition, test interpretation, treatment sequencing or disposition. Review why each alternative is less appropriate, then restate the principle without copying the explanation.
4. Practise reassessment and age modifiers
Change one feature in each case: add hypotension, delayed presentation, pregnancy, childhood or older age. Explain how the change affects urgency, testing or disposition, and identify what must be reassessed after the initial intervention.
5. Space recall and extend coverage
Revisit the flashcards at increasing intervals and use missed principles to direct further study. Return to the official outline regularly to identify conditions, procedures and professional competencies outside this selective guide.
Use your sample score as a starting point
The free set contains 20 original practice questions. It is a small learning sample, not an official examination or a validated pass prediction. Review each explanation and its source before moving to another topic.
Start the free sampleOfficial sources and updates
- ABEM — Qualifying Exam
- ABEM — EM Model
- 2022 Model of the Clinical Practice of Emergency Medicine
- ABEM — Get Certified
- ABEM — Certifying Exam Content
- Royal Children's Hospital — Syncope
- Royal Children's Hospital — Hypoglycaemia
- NIDDK — Diagnosis of Pancreatitis
- NIDDK — Symptoms and Causes of Pancreatitis
- World Society of Emergency Surgery — Acute Mesenteric Ischemia: Updated Guidelines
- AHA 2025 — Adult Tachyarrhythmia With a Pulse Algorithm
- AHA 2025 — Adult Cardiac Arrest Algorithm
- Hyperglycaemic Crises in Adults With Diabetes: A Consensus Report (2024)
- SCCM — Surviving Sepsis Campaign Adult Guidelines (2026)
- CDC — Meningococcal Disease: Infection Control
- ACEP — Clinical Policy on Acute Headache (2019)
- AHA — 2026 Acute Pulmonary Embolism Guideline: Top Things to Know
- AHA — 2026 Acute Pulmonary Embolism Guideline Summary
- Royal Children's Hospital — Acute Asthma
- CDC — Clinical Guidance for Carbon Monoxide Poisoning
- Royal Children's Hospital — Thoracocentesis and Chest Drain Insertion
- ACS TQIP — Best Practices in the Management of Orthopedic Trauma
- AHA 2025 — Adult Advanced Life Support
- ACEP Sonoguide — Pericardiocentesis
- NHS — Ectopic Pregnancy: Treatment
- European Association of Urology — Guidelines on Urolithiasis
- CDC/NIOSH — Heat-Related Illnesses
- IDSA — Skin and Soft Tissue Infection Guidelines (2014)
- American Academy of Ophthalmology EyeWiki — Chemical Injury of the Conjunctiva and Cornea
- ASH — Sickle Cell Disease Clinical Practice Guidelines: What You Should Know
- Resuscitation Council UK — Emergency Treatment of Anaphylaxis (2021)
- Royal Children's Hospital — The Acutely Swollen Joint
- ACEP — Clinical Policy on the Adult Psychiatric Patient (2017)
- AMA Code of Medical Ethics — Informed Consent
- AHA 2025 — Adult Basic Life Support
- AHA and American Red Cross — 2024 Guidelines for First Aid
- Pericardiocentesis | Sonoguide
- Cardiac Tamponade and Ultrasound-Guided Pericardiocentesis | EM Ultrasound Section
- 2.1.1.pdf
- AJG-Clinical-Guidelines-Highlights-Acute-Pancreatitis-2024-FINAL.pdf
- Clinical Practice Guidelines : The acutely swollen joint
- aesconvulsivestatusepilepticus.pdf
- Clinical Practice Guidelines : Thoracocentesis and chest drain insertion
Confirm current eligibility, fees, scheduling and policies directly with the examination provider. CertMedbry is independent and is not endorsed by these organisations. How we handle content and corrections.