Medical Licensing (MD/DO) · Independent exam preparation
AMC CAT MCQ: Clinical Decisions and Essential Principles Study Guide
Study diagnostic discrimination, emergency priorities and safe management across the six AMC CAT MCQ domains through 60 selective concepts and original practice activities.
By CertMedbry · Updated 19 October 2026
Recognise time-critical illness, distinguish competing diagnoses and connect investigations to management decisions. This selective guide develops 60 concepts across the six official domains, applying Data Gathering, Data Interpretation and Synthesis, and Management. The official AMC MCQ Examination Specifications define the full examination scope, including medical sciences, clinical conditions and professional responsibilities beyond this selection.
Try 20 free practice questionsWhat is the exam format?
Check the question types, timing and outline before planning your revision.
How many questions are there, and how much time is available?
The examination contains 150 scored questions in one 3.5-hour session. Candidates are expected to complete all 150 questions.
AMC Computer Adaptive Test (CAT) Multiple Choice Question (MCQ) Examination
What question style and delivery method does the examination use?
The examination is computer administered and officially designated a Computer Adaptive Test. Each question has one correct response among five options. Pearson VUE delivers it at examination centres. This guide's 20 practice questions use four options and do not reproduce adaptive delivery or predict an examination result.
AMC Computer Adaptive Test (CAT) Multiple Choice Question (MCQ) Examination
Which specifications and blueprint underpin this guide?
The guide uses AMC MCQ Examination Specifications V8, September 2025, with no separate effective date stated. The domain allocations are Adult health [Medicine] 30%, Adult health [Surgery] 20%, and 12.5% each for Women’s health [Obstetrics/Gynaecology], Child health, Mental health and Population health. The official specifications define the full scope.
Multiple Choice Question Examination Specifications, V8 · Examination specifications
How does this selection reflect the blueprint?
The 60 concepts comprise 18 adult medicine, 12 adult surgery, eight women’s health, eight child health, seven mental health and seven population health concepts. The questions comprise six, four, three, three, two and two items respectively. These small selections approximate domain proportions and do not provide comprehensive coverage of the official outline.
Does passing the MCQ complete the AMC certificate pathway?
An AMC certificate requires passing the MCQ and either the AMC clinical examination or an AMC-accredited workplace-based assessment program. Passing the MCQ alone does not grant medical registration.
Is AMC CAT a separate qualification?
AMC CAT is a shortened label for the AMC Computer Adaptive Test (CAT) Multiple Choice Question (MCQ) Examination. It does not identify a separate examination or credential.
AMC Computer Adaptive Test (CAT) Multiple Choice Question (MCQ) Examination · AMC examinations and assessment
How are authorisation and scheduling arranged?
Candidates apply through their AMC account for authorisation, then schedule an examination venue with Pearson VUE. The AMC states that authorisation is valid for 12 months for scheduling an event. Check current AMC instructions for residency-related access restrictions and other booking requirements.
AMC Computer Adaptive Test (CAT) Multiple Choice Question (MCQ) Examination
How should clinical sources and Australian jurisdiction be interpreted?
Australian guidance supports most clinical teaching here. The UK and Ireland stroke guideline supports selected stroke-assessment principles; NIMH supports selected psychiatric principles; the archived CDC reference supports surveillance definitions. These references do not establish Australian legal requirements. Consent and substitute decision-making arrangements vary between Australian states and territories.
National Clinical Guideline for Stroke for the UK and Ireland: Acute care · National Institute of Mental Health: Bipolar Disorder · CDC Principles of Epidemiology: Characteristics of Well-Conducted Surveillance · Australian Commission on Safety and Quality in Health Care: Informed consent
This guide addresses the AMC Computer Adaptive Test (CAT) Multiple Choice Question (MCQ) Examination within the Standard Pathway for international medical graduates. Its assessment standard is that of an Australian medical graduate about to begin internship. CertMedbry independently authored these educational materials; they are not official AMC examination questions.
Outline used: AMC MCQ Examination Specifications, V8, September 2025; no separate effective date stated. The workbook label 'Australian Medical Council Computer Adaptive Test (AMC CAT)' refers to this examination, not a separate credential.
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.
Adult health [Medicine]30%
1.What establishes diabetic ketoacidosis?
DKA requires ketonaemia with metabolic acidosis in an appropriate diabetic context; hyperglycaemia alone is insufficient. The NSW ACI adult emergency-department pathway usually lists glucose >11 mmol/L. Its treatment-selection table distinguishes severity: mild DKA has ketones 1.5–3 mmol/L, pH 7.25–7.30 and bicarbonate 15–18 mmol/L; moderate DKA has ketones >3 mmol/L, pH 7.00–7.24 and bicarbonate 10–14 mmol/L; severe DKA has ketones >3 mmol/L, pH <7.00 and bicarbonate <10 mmol/L. These are pathway-specific severity categories, not interchangeable standalone diagnostic tests.
Apply it
After missed insulin, glucose 24 mmol/L, blood ketones 4.8 mmol/L, venous pH 7.18 and bicarbonate 12 mmol/L establish a ketoacidotic pattern matching this pathway’s moderate category.
Common pitfall: Do not exclude DKA because glucose is ≤11 mmol/L: euglycaemic presentations occur, including with SGLT2 inhibitors, pregnancy and known type 1 diabetes. Interpret ketones and acid–base results together.
2.How does hyperosmolar hyperglycaemic state differ from DKA?
HHS predominantly causes hyperglycaemia, hyperosmolality and dehydration; residual insulin activity limits ketogenesis. The NSW ACI adult emergency-department pathway’s HHS column specifies glucose >33 mmol/L, calculated osmolality >320, pH >7.30, bicarbonate >18 mmol/L and ketones <3 mmol/L. Its total calculated osmolality is 2 × sodium + urea + glucose, with all inputs in mmol/L; the result is conventionally expressed in mOsm/kg. Effective osmolality, or tonicity, excludes urea: 2 × sodium + glucose. Urea contributes to total osmolality but crosses cell membranes relatively freely, so it contributes little sustained osmotic water shift.
Apply it
With measured sodium 145 mmol/L, urea 15 mmol/L and glucose 40 mmol/L, total calculated osmolality is 290 + 15 + 40 = 345 mOsm/kg; effective osmolality is 330 mOsm/kg. If pH is 7.36, bicarbonate 23 mmol/L and ketones 0.8 mmol/L, the results support HHS.
Common pitfall: Specify which calculation you used: this pathway’s >320 threshold accompanies its total formula. Substantial ketonaemia and metabolic acidosis alongside hyperosmolality suggest mixed DKA–HHS rather than uncomplicated HHS.
3.Why can SGLT2 inhibitors conceal the glucose signal of DKA?
SGLT2 inhibitors reduce renal glucose reabsorption and increase urinary glucose loss. Consequently, clinically important ketoacidosis can develop without the pronounced hyperglycaemia usually associated with DKA. Nausea, vomiting, abdominal pain or rapid breathing in an unwell person taking one of these medicines should trigger ketone and acid–base assessment even when glucose seems reassuring. Medication history therefore changes how the glucose result should be interpreted.
Apply it
A person taking an SGLT2 inhibitor develops vomiting and rapid breathing during illness. Check blood ketones and venous acid–base status despite only mildly elevated glucose.
Common pitfall: Using a high glucose threshold as the mandatory trigger for ketone testing can miss SGLT2-associated DKA and delay recognition of a serious metabolic emergency.
Management of diabetic ketoacidosis and hyperosmolar hyperglycaemic state in adults in the emergency department · TGA Medicines Safety Update, Volume 6, Number 5, October 2015
4.When must insulin be withheld during DKA treatment?
DKA commonly causes total-body potassium depletion despite an initially normal or elevated serum concentration. Insulin deficiency and acidosis shift potassium out of cells; insulin treatment reverses that shift and can provoke dangerous hypokalaemia. The cited ACI pathway requires potassium assessment every 1–2 hours and cardiac monitoring. If potassium is below 3.5 mmol/L, withhold insulin and provide monitored, protocol-directed potassium replacement until corrected.
Apply it
A patient with DKA has potassium 3.1 mmol/L. Begin appropriate fluid management and monitored potassium correction, withholding insulin until potassium is corrected rather than starting it immediately.
Common pitfall: Initial hyperkalaemia does not establish adequate potassium stores. Replacement must account for renal function, vascular access and monitoring capacity; continuing insulin during significant hypokalaemia increases arrhythmia risk.
5.Which initial corticosteroid-containing regimen suits infrequent asthma symptoms?
For suitable newly diagnosed adults and adolescents with infrequent symptoms and no maintenance-treatment indication, as-needed low-dose budesonide–formoterol provides rapid bronchodilation and inhaled corticosteroid with each use. Daily low-dose inhaled corticosteroid with an appropriate reliever is an alternative. More frequent symptoms or important exacerbation risk favour maintenance corticosteroid-containing treatment. Device suitability, technique and the approved regimen matter when selecting an inhaler.
Apply it
An adult with confirmed asthma prefers symptom-driven treatment and has infrequent symptoms without important exacerbation risk. Discuss as-needed low-dose budesonide–formoterol and demonstrate the appropriate inhaler technique.
Common pitfall: Every corticosteroid–LABA combination is not an interchangeable reliever. Reliever-only treatment also differs from maintenance-and-reliever therapy, which includes scheduled maintenance doses.
Australian Asthma Handbook: Initial asthma treatment for adults and adolescents after diagnosis
6.Why is LABA monotherapy unsafe in asthma?
A long-acting beta2 agonist relaxes airway smooth muscle but does not provide the anti-inflammatory treatment required in asthma. LABA monotherapy can improve perceived airflow while leaving underlying inflammation inadequately treated and is associated with serious asthma-related harm. When a LABA is indicated for asthma, it must accompany an inhaled corticosteroid. A combination inhaler helps link bronchodilator use to corticosteroid delivery.
Apply it
During medication reconciliation, an adult with asthma reports using a long-acting bronchodilator alone. Identify the missing corticosteroid component and review symptoms, exacerbations, adherence and device technique when correcting treatment.
Common pitfall: A medicine's long duration of action does not establish anti-inflammatory protection. Do not transfer a bronchodilator-only strategy from another obstructive airway condition to asthma.
Australian Asthma Handbook: Initial asthma treatment for adults and adolescents after diagnosis
7.What bronchodilator response supports an asthma diagnosis?
The cited Australian Asthma Handbook criterion is an FEV1 increase of at least 12% and at least 200 mL from the pre-bronchodilator measurement. Both thresholds must be met using good-quality spirometry and a compatible clinical presentation. An increase from 2.00 L to 2.30 L is 300 mL and 15%, satisfying the criterion. Objective variability supports the diagnosis rather than replacing the clinical assessment.
Apply it
Calculate the absolute change and divide it by baseline FEV1 to obtain the percentage change. Combine a significant response with the history of variable respiratory symptoms.
Common pitfall: A 150 mL increase from 1.00 L is 15% but fails the absolute threshold. Subjective relief and technically poor manoeuvres cannot substitute for valid measurements.
Australian Asthma Handbook: Diagnosing asthma in adults and adolescents
8.When does normal spirometry leave asthma unresolved?
Asthma is variable, so airflow measurements may be normal between symptomatic episodes or after treatment. One normal spirometry result therefore does not settle a convincing diagnostic history. If suspicion remains, obtain further objective assessment, such as repeat spirometry during symptoms or another guideline-supported test of variable airflow limitation. Review alternative diagnoses in parallel rather than interpreting all recurrent respiratory symptoms as asthma.
Apply it
A patient reports recurrent exercise-associated wheeze but has normal spirometry on an asymptomatic day. Plan objective reassessment under suitable conditions and examine competing explanations for the symptoms.
Common pitfall: One normal test should not prematurely close the evaluation. Conversely, repeated empirical prescribing without objective confirmation can perpetuate an incorrect diagnosis and obscure the actual problem.
Australian Asthma Handbook: Diagnosing asthma in adults and adolescents
9.Which findings indicate anaphylaxis without a rash?
Anaphylaxis is a severe systemic hypersensitivity reaction that can compromise airway, breathing or circulation. Acute bronchospasm, upper-airway obstruction or hypotension after a likely allergen exposure can indicate anaphylaxis even without skin findings. Assess the timing and pattern of organ involvement rather than requiring urticaria. Respiratory or cardiovascular compromise distinguishes a potentially fatal reaction from an isolated mild skin reaction.
Apply it
Soon after an insect sting, an adult develops wheeze, throat tightness, dizziness and hypotension without urticaria. Recognise the exposure-linked cardiorespiratory pattern and initiate emergency treatment.
Common pitfall: Absence of rash does not justify withholding adrenaline when the exposure and airway, breathing or circulation findings are convincing. Waiting for additional organ involvement can allow deterioration.
10.How should adrenaline be given initially for adult anaphylaxis?
Give adrenaline promptly into the outer mid-thigh. For an adult over 50 kg, ASCIA's ampoule-and-syringe example is 0.5 mL of adrenaline 1 mg/mL, delivering 0.5 mg intramuscularly. Reassess airway, breathing and circulation continuously and repeat after 5 minutes if there is no response or symptoms persist. Adrenaline reduces mucosal oedema, produces bronchodilation and vasoconstriction, and increases cardiac contraction.
Apply it
A 70 kg adult develops anaphylactic shock. Give the appropriate intramuscular dose while arranging emergency support, then reassess and repeat after 5 minutes if needed.
Common pitfall: Confusing concentration, volume and dose causes major errors. Fixed-dose devices have separate instructions; antihistamines cannot replace adrenaline, and routine intravenous boluses are inappropriate outside specific expert settings.
ASCIA Guidelines: Acute Management of Anaphylaxis · ASCIA_HP_Adrenaline_Doses_Anaphylaxis_2026.pdf
11.How does positioning protect circulation during anaphylaxis?
Anaphylaxis causes vasodilation and fluid movement out of the circulation, reducing effective circulating volume and venous return. Keep the patient lying flat and do not permit standing or walking, including after apparent improvement. If breathing is difficult, supported sitting with legs outstretched may be necessary; avoid abrupt postural change. Use a left lateral position in pregnancy. Positioning supports cardiac filling while adrenaline and other emergency measures address the reaction.
Apply it
After adrenaline, a dizzy patient offers to walk to the ambulance. Keep them appropriately positioned and arrange assisted movement because symptom improvement does not establish postural safety.
Common pitfall: Standing can precipitate cardiovascular deterioration. Sitting with dependent legs can also worsen venous return when circulatory compromise remains present.
12.What does a low ferritin establish?
Ferritin reflects iron stores, and a low concentration provides strong evidence of iron deficiency. Anaemia describes reduced haemoglobin, whereas iron deficiency describes depleted iron stores; deficiency can precede anaemia. Interpret the full blood count alongside ferritin rather than requiring microcytosis, which can be absent early and has other causes. Once deficiency is established, iron replacement and investigation of its cause should proceed together.
Apply it
An adult has fatigue, low haemoglobin and clearly reduced ferritin despite a mean cell volume near the reference range. Recognise iron deficiency rather than waiting for marked microcytosis.
Common pitfall: A normal mean cell volume does not exclude iron deficiency. Microcytosis is a clue to investigate, not proof of the underlying cause or a prerequisite for diagnosis.
Lifeblood: Diagnosis and investigation of iron deficiency anaemia
13.Why can inflammation hide iron deficiency?
Ferritin is an acute-phase reactant as well as an indicator of iron stores. Inflammation can raise ferritin, making a normal or elevated result misleading when iron deficiency coexists. Interpret ferritin alongside the inflammatory context and consider transferrin saturation to assess iron availability. Low transferrin saturation can indicate restricted supply, but does not alone distinguish depleted stores from inflammatory iron restriction.
Apply it
A patient with inflammatory disease has anaemia, non-low ferritin and reduced transferrin saturation. Assess inflammatory activity and possible coexisting iron deficiency instead of treating ferritin as definitive reassurance.
Common pitfall: Normal ferritin is more reassuring when inflammation is absent. A low transferrin saturation also requires contextual interpretation rather than automatic classification as isolated absolute iron deficiency.
Lifeblood: Diagnosis and investigation of iron deficiency anaemia
14.Which investigations generally follow iron deficiency anaemia in an adult man?
Lifeblood recommends gastroscopy and colonoscopy as generally first-line gastrointestinal investigations in adult men with newly diagnosed iron deficiency anaemia. Investigate while replacing iron. Include urinalysis or urine microscopy and coeliac screening, and assess medicines, diet and other possible contributors. Occult gastrointestinal loss, including malignancy, may occur without pain or visible bleeding. Faecal occult blood testing should not determine that gastrointestinal investigation is unnecessary.
Apply it
A 58-year-old man has confirmed iron deficiency anaemia without bowel symptoms. Arrange gastrointestinal investigation, urinalysis and coeliac screening while commencing iron replacement and reviewing other contributors.
Common pitfall: A haemoglobin response to iron treats the consequence without establishing its cause. Absence of overt bleeding does not exclude clinically significant gastrointestinal disease.
Lifeblood: Determining the underlying causes of iron deficiency anaemia
15.Who needs coeliac screening during an iron deficiency assessment?
The cited Lifeblood guidance recommends coeliac screening for patients with confirmed iron deficiency anaemia. Screening should not depend on diarrhoea, recurrent deficiency or failed iron treatment. Coeliac disease can impair small-intestinal absorption and present with iron deficiency alone. A response to replacement does not exclude the underlying disorder. Testing must account for gluten intake and factors affecting interpretation, because premature dietary exclusion can compromise diagnostic assessment.
Apply it
Include coeliac screening during the initial investigation of confirmed iron deficiency anaemia, even when bowel symptoms are absent and oral iron appears effective.
Common pitfall: Restricting screening to symptomatic malabsorption misses eligible patients. Starting gluten exclusion before assessment can make subsequent testing harder to interpret and leave the diagnosis uncertain.
Lifeblood: Determining the underlying causes of iron deficiency anaemia
16.Why measure glucose immediately in suspected stroke?
Hypoglycaemia can cause focal neurological deficits or altered consciousness resembling acute stroke and is immediately treatable. Measure bedside glucose during initial assessment rather than waiting for routine laboratory results. Correct hypoglycaemia promptly, then reassess the neurological findings. Persistent deficits still require urgent stroke evaluation. Glucose testing identifies a reversible mimic while symptom-onset history, neurological examination and appropriate imaging address the possibility of vascular disease.
Apply it
An adult develops sudden unilateral weakness and confusion. Measure glucose while initiating acute neurological assessment; treat a low result and determine whether focal deficits remain.
Common pitfall: Assuming every sudden deficit is vascular can delay treatment of hypoglycaemia. Finding low glucose also cannot explain away deficits that persist after adequate correction.
National Clinical Guideline for Stroke for the UK and Ireland: Acute care
17.When does a negative FAST screen still require stroke assessment?
FAST emphasises facial weakness, arm weakness and speech disturbance, so it cannot detect every stroke presentation. Posterior circulation events may cause sudden gait disturbance, diplopia or other neurological findings without a positive FAST result. Treat FAST as a recognition aid rather than an exclusion test. Abrupt onset and a coherent focal neurological pattern should sustain urgent assessment even when the sampled features are absent.
Apply it
A patient suddenly develops diplopia and cannot walk steadily, despite normal facial movement, arm strength and speech. Maintain concern for posterior circulation stroke and initiate urgent assessment.
Common pitfall: A negative screen cannot exclude presentations outside its sampled features. Conversely, nonspecific dizziness alone does not establish stroke and still requires careful clinical discrimination.
National Clinical Guideline for Stroke for the UK and Ireland: Acute care
18.How should a potentially serious transfusion reaction be approached?
New fever, dyspnoea, hypotension, pain or other concerning symptoms during transfusion require immediate assessment. Stop the transfusion, assess airway, breathing and circulation, maintain appropriate intravenous access, and notify the responsible team and transfusion service. Check patient and component identification and follow the reaction investigation pathway. Pulmonary oedema with hypertension, raised jugular venous pressure and fluid-overload evidence supports transfusion-associated circulatory overload, although dyspnoea alone does not establish its mechanism.
Apply it
An older patient becomes breathless and hypertensive during transfusion, with crackles and venous congestion. Stop the transfusion and assess urgently while considering TACO and other serious reactions.
Common pitfall: Simply slowing the transfusion is inadequate when a serious reaction is possible. Respiratory deterioration should not automatically be labelled allergy or overload without examining the accompanying findings.
Lifeblood: Management of suspected transfusion reactions · Lifeblood: Transfusion-associated circulatory overload
Adult health [Surgery]20%
19.Which clinical findings suggest testicular torsion?
Sudden severe unilateral scrotal pain, often accompanied by nausea or vomiting, should raise immediate concern for torsion. A high-riding or abnormally oriented testis and absent cremasteric reflex strengthen suspicion, but no single examination finding safely excludes it. Pain may initially be abdominal rather than clearly scrotal. Assess the complete pattern and obtain urgent surgical review whenever torsion cannot be confidently excluded.
Apply it
A young adult develops abrupt scrotal pain, vomiting and an elevated testis. Treat the combination as a surgical emergency rather than waiting for greater swelling or more characteristic skin changes.
Common pitfall: An incomplete textbook presentation is not reassuring. Urinary symptoms, a present reflex or modest swelling cannot independently establish that torsion is absent.
RACGP: Acute scrotal pain · RCH Clinical Practice Guidelines: Acute scrotal pain or swelling
20.How does spermatic-cord rotation injure the testis?
Torsion rotates the spermatic cord, obstructing venous drainage and potentially compromising arterial perfusion. Congestion and ischaemia threaten testicular viability, explaining why severe pain can precede dramatic external changes. The degree and duration of twisting influence injury, so visible swelling cannot reliably indicate remaining perfusion. The mechanism makes urgent restoration of blood supply the central concern rather than pain control alone.
Apply it
A patient has sudden severe testicular pain with relatively little skin change. Recognise that threatened internal perfusion can precede an impressive external appearance and arrange immediate surgical assessment.
Common pitfall: Analgesic improvement does not demonstrate restored circulation. A benign-looking scrotal surface cannot establish that the spermatic cord is untwisted or that the testis remains adequately perfused.
RACGP: Acute scrotal pain · RCH Clinical Practice Guidelines: Acute scrotal pain or swelling
21.Why can Doppler ultrasound fail to exclude torsion?
Doppler ultrasound can assist selected scrotal assessments but is not an infallible exclusion test. Preserved flow may occur with partial, intermittent or early torsion, and diagnostic performance depends on the circumstances and expertise. When the clinical pattern is concerning, imaging should not delay surgical review. The question is whether torsion remains plausible after integrating the history, examination and test limitations.
Apply it
A patient has recurrent abrupt scrotal pain and a previous scan reporting flow. Discuss possible torsion urgently rather than treating the earlier result as permanent exclusion of a changing process.
Common pitfall: A reassuring report cannot override a strongly suspicious presentation. Ordering imaging before contacting the surgical team can consume time needed to protect testicular viability.
RCH Clinical Practice Guidelines: Acute scrotal pain or swelling · RACGP: Acute scrotal pain
22.Why does delayed torsion presentation still require urgent assessment?
Longer symptom duration generally reduces testicular salvage probability, but elapsed time alone cannot establish viability. The degree of twisting and residual perfusion vary, and the clinical history may include intermittent rather than continuous torsion. Persistent suspicion therefore requires urgent surgical assessment even after a prolonged delay. Decisions about viability and treatment cannot be made safely from a pessimistic estimate based only on the clock.
Apply it
A patient presents after many hours of severe scrotal pain. Contact the surgical team urgently rather than converting the case to routine follow-up because the ideal treatment window may have passed.
Common pitfall: Assuming that salvage is impossible can cause further avoidable delay. Late presentation changes prognosis but does not resolve the diagnosis or remove the need for treatment.
RCH Clinical Practice Guidelines: Acute scrotal pain or swelling · RACGP: Acute scrotal pain
23.Which groin swelling suggests an irreducible hernia?
A painful inguinal or inguinoscrotal swelling that cannot be reduced raises concern for an irreducible hernia. Entrapped bowel may become obstructed or lose its blood supply; vomiting, distension and systemic deterioration increase concern. Arrange urgent surgical assessment rather than treating this as an uncomplicated elective hernia. The current combination of pain, irreducibility and gastrointestinal findings matters more than its previously benign history.
Apply it
A previously reducible groin lump becomes persistently painful and tender with vomiting. Arrange urgent surgical assessment for possible obstruction or compromised bowel perfusion.
Common pitfall: A long history without complications does not protect against new entrapment. Investigation should support urgent management rather than become a prerequisite that delays referral.
RCH Clinical Practice Guidelines: Acute scrotal pain or swelling
24.When should surgical assessment precede further scrotal investigations?
Suspected torsion and an irreducible hernia are emergencies in which delayed treatment can threaten tissue viability. Contact the surgical team when either remains plausible rather than requiring urine tests or ultrasound before referral. Clinical assessment establishes the urgency; investigations can then be selected within the emergency pathway. This sequence preserves time while allowing specialist judgement about whether testing will change immediate management.
Apply it
A patient has an acutely painful scrotum and examination cannot exclude torsion. Request immediate surgical assessment while arranging supportive care instead of waiting for routine laboratory results.
Common pitfall: Completing an investigation checklist is not the same as making safe progress. Tests for infection do not independently exclude an ischaemic or obstructive surgical cause.
RCH Clinical Practice Guidelines: Acute scrotal pain or swelling
25.How should a thermal burn be cooled?
After ensuring scene safety and stopping heat exposure, cool a thermal burn with cool running water for at least 20 minutes. Cooling removes retained heat and limits ongoing tissue damage. Address airway, breathing and other immediately life-threatening injuries first when present. Cool the affected area while keeping the rest of the person warm, balancing local treatment against whole-body hypothermia, especially with larger burns.
Apply it
An adult spills hot liquid over one forearm. Remove ongoing heat exposure and cool the affected skin with running water for at least 20 minutes while keeping unaffected areas covered.
Common pitfall: A brief splash or early pain improvement does not establish adequate cooling. Prolonged whole-body chilling can create additional harm rather than improve burn treatment.
26.Why should ice be avoided on burned tissue?
Ice and iced water can cause additional cold injury and marked vasoconstriction in tissue already damaged by heat. Effective burn first aid aims for controlled removal of retained heat, rather than the coldest possible exposure. Cool running water provides cooling without the same freezing risk. Unproven creams should not replace cooling and may obscure assessment of the wound after initial treatment.
Apply it
A bystander places an ice pack directly on a fresh hand burn. Remove the extreme-cold exposure and use cool running water, then protect the cooled area with an appropriate covering.
Common pitfall: More intense cold does not mean better first aid. Temporary numbness from ice can be mistaken for successful treatment while additional tissue injury is occurring.
27.Which burn features suggest inhalation injury?
Enclosed-space smoke exposure, facial burns, soot around the mouth or nose, hoarseness and breathing difficulty raise concern for inhalation injury. Airway swelling and respiratory injury may evolve, so modest skin burns do not establish low risk. Prioritise airway and breathing assessment, emergency assistance and ongoing observation. The exposure mechanism matters because the most dangerous injury may be internal rather than visible on the skin.
Apply it
A person rescued from a smoke-filled room has small facial burns and new hoarseness. Escalate the airway concern urgently instead of judging severity from the burned skin area alone.
Common pitfall: A small external burn does not exclude major airway injury. Waiting for pronounced obstruction can leave little time to manage progressive swelling.
28.Why is a focal deficit after head injury a red flag?
New unilateral weakness, altered speech or another focal neurological deficit after head trauma suggests possible intracranial structural injury. It requires urgent escalation and brain-imaging assessment even when consciousness is preserved. Compare findings with baseline, document abnormalities and reassess for evolution. A normal overall consciousness score and fluent conversation cannot negate a focal abnormality because global responsiveness and local neurological function measure different aspects of injury.
Apply it
An adult remains awake after a fall but develops new arm weakness. Arrange urgent head-injury assessment and CT evaluation rather than waiting for a decline in consciousness.
Common pitfall: Observation alone should not postpone assessment of an established neurological red flag. Improvement in headache after analgesia does not resolve a persistent focal deficit.
29.Which findings suggest a skull-base fracture?
Periorbital bruising, bruising behind the ear, haemotympanum and suspected cerebrospinal fluid leakage from the nose or ear are concerning after head trauma. These findings suggest possible skull-base fracture and change the risk assessment even in an alert, haemodynamically stable patient. Arrange urgent senior assessment and appropriate imaging. Their importance is the underlying fracture and associated injury risk rather than the cosmetic extent of bruising.
Apply it
After blunt head trauma, a patient has bruising behind one ear and haemotympanum. Escalate for possible skull-base injury despite normal conversation and stable blood pressure.
Common pitfall: Characteristic ear or facial findings should not be dismissed as superficial bruising. Some signs appear after the initial examination, making reassessment clinically important.
30.How can important head injury occur without loss of consciousness?
Loss of consciousness is one possible consequence of trauma, not a prerequisite for brain injury. Amnesia, repeated vomiting, worsening headache, focal abnormalities and the injury mechanism remain important when the person stayed awake. Determine risk from the complete history, neurological examination and clinical pathway. Reassessment matters because symptoms can evolve, and one question about blacking out cannot replace structured evaluation.
Apply it
A patient denies losing consciousness after a collision but has repeated vomiting and worsening headache. Continue the head-injury pathway and escalate according to the concerning findings.
Common pitfall: No loss of consciousness does not mean no brain injury. Conversely, a brief blackout alone does not describe the complete injury severity or determine every subsequent decision.
Women’s health [Obstetrics/Gynaecology]12.5%
31.Which blood-pressure thresholds distinguish non-severe and severe pregnancy hypertension?
Queensland defines hypertension as systolic pressure at least 140 mmHg and/or diastolic pressure at least 90 mmHg. Non-severe elevation is generally confirmed on repeated measurements at least four hours apart. Severe hypertension is systolic pressure at least 160 mmHg and/or diastolic pressure at least 110 mmHg, requiring rapid confirmation, approximately 15 minutes apart or sooner when needed for timely treatment. New hypertension after 20 weeks requires assessment for pre-eclampsia.
Apply it
At 31 weeks, a patient has pressure 166/112 mmHg and headache. Arrange immediate obstetric assessment and rapidly confirm the severe reading rather than scheduling a four-hour repeat.
Common pitfall: Either systolic or diastolic elevation is sufficient. The non-severe confirmation interval must not delay treatment of severe hypertension or assessment of associated organ dysfunction.
32.How can pre-eclampsia occur without proteinuria?
Pre-eclampsia is a multisystem disorder and does not always require proteinuria. New pregnancy-associated hypertension with relevant maternal organ dysfunction can support diagnosis despite absent urine protein. Renal impairment, liver involvement, neurological complications and haematological abnormalities are important discriminators. Assess symptoms, blood tests and fetal wellbeing together. A negative urine result addresses one feature and cannot neutralise evidence of disease in other systems.
Apply it
A patient with new hypertension has visual symptoms and falling platelets without proteinuria. Maintain urgent concern for pre-eclampsia based on the neurological and haematological involvement.
Common pitfall: Treating proteinuria as obligatory can miss significant pre-eclampsia. Calling the condition uncomplicated gestational hypertension is inappropriate when relevant organ dysfunction is already present.
33.Which abnormalities define the HELLP pattern?
HELLP describes haemolysis, elevated liver enzymes and low platelets in a serious pregnancy-associated syndrome. The combined pattern indicates systemic disease rather than isolated liver irritation or uncomplicated thrombocytopenia. Right upper quadrant or epigastric pain, malaise and nausea may accompany it. Evaluate all components and obtain urgent obstetric management because maternal and fetal deterioration can occur even when the presenting symptoms initially seem nonspecific.
Apply it
Late-pregnancy epigastric pain accompanies evidence of haemolysis, raised transaminases and thrombocytopenia. Recognise the HELLP pattern and escalate instead of attributing the pain to uncomplicated reflux.
Common pitfall: One abnormal liver enzyme or platelet result alone does not establish the complete syndrome. Conversely, a benign symptom label must not override a concerning combined laboratory pattern.
34.What does pregnancy of unknown location mean?
Pregnancy of unknown location is a provisional classification when pregnancy is confirmed but ultrasound identifies neither an intrauterine nor an extrauterine pregnancy. Possibilities include an early intrauterine pregnancy, a failing pregnancy and ectopic pregnancy. The classification describes current uncertainty rather than a final diagnosis. Symptoms, serial assessment and repeat imaging must establish location or outcome while maintaining vigilance for deterioration.
Apply it
A stable patient has a positive pregnancy test and no pregnancy visible on transvaginal ultrasound. Explain the unresolved possibilities and arrange structured follow-up rather than diagnosing ectopic pregnancy from the empty uterus alone.
Common pitfall: An inconclusive first scan does not establish pregnancy loss or justify treatment that could harm an early viable intrauterine pregnancy. Stability supports follow-up only with an effective safety plan.
35.Why can hCG trends not locate a pregnancy?
Serum hCG reflects trophoblastic activity rather than implantation location. A rising concentration does not prove an intrauterine pregnancy, and a falling concentration does not independently exclude ectopic pregnancy. Trends help guide assessment when interpreted with symptoms and transvaginal ultrasound, but location and viability remain separate questions. Biochemical improvement therefore cannot replace follow-up until the pregnancy's location or outcome is appropriately established.
Apply it
A patient with pregnancy of unknown location has rising hCG and no definitive intrauterine pregnancy. Continue the planned localisation pathway rather than ending follow-up because the biochemical trend appears encouraging.
Common pitfall: Interpreting a reassuring rise as anatomical proof can miss ectopic pregnancy. New pain, syncope or circulatory compromise requires immediate reassessment regardless of the previous hCG trajectory.
36.What follow-up is needed for stable pregnancy of unknown location?
Repeat serum hCG at approximately 48 hours; the Queensland pathway allows up to 72 hours. Plan repeat transvaginal ultrasound according to symptoms, the hCG course and prior imaging. A stable pathway suggesting a developing intrauterine pregnancy may use scanning in 1–2 weeks below hCG 2000 IU/L or within one week at higher concentrations. These guide timing rather than prove location. Assign a named clinician or service to review results.
Apply it
Provide a repeat hCG appointment, an individualised ultrasound plan and explicit instructions for immediate reassessment with severe pain, syncope or deterioration. Confirm who will act on the results.
Common pitfall: A scheduled blood test alone is not a safety plan. Neither an hCG threshold nor an improving trend removes the need to respond to new symptoms.
37.When can ultrasound establish early pregnancy non-viability?
Strict transvaginal ultrasound criteria include an embryo with crown–rump length at least 7 mm and no cardiac activity, or mean gestational sac diameter at least 25 mm without an embryo, with appropriate expertise and confirmation. Below definitive thresholds, repeat assessment rather than diagnose loss from menstrual dating alone. Repeat intervals depend on prior findings: a fetal pole below 7 mm without cardiac activity requires at least seven days; a smaller empty sac may require longer.
Apply it
A small embryo without cardiac activity measures below the definitive threshold. Explain that viability remains uncertain and arrange appropriately timed repeat imaging before treatment for confirmed pregnancy loss.
Common pitfall: Repeating too soon may remain inconclusive. Applying smaller diagnostic thresholds or relying solely on date discrepancy can misclassify a viable pregnancy.
38.How do the four Ts organise postpartum haemorrhage assessment?
The four Ts are tone, trauma, tissue and thrombin. Tone means inadequate uterine contraction; trauma includes genital tract injury; tissue includes retained placental material; thrombin means coagulation problems. A boggy enlarged uterus supports atony, whereas continued bleeding with a firm uterus prompts assessment of other causes. Resuscitation and cause-directed treatment proceed together because identifying one contributor does not exclude another.
Apply it
A patient has heavy bleeding after birth and a firmly contracted uterus. Continue resuscitation while assessing genital tract trauma, retained tissue and coagulation rather than repeatedly treating presumed atony alone.
Common pitfall: The commonest cause is not necessarily the current cause. A firm uterus reduces the likelihood of isolated atony but does not reduce haemorrhage urgency or exclude multiple contributors.
Queensland Clinical Guideline: Primary postpartum haemorrhage
Child health12.5%
39.Which intermittent symptoms suggest intussusception?
Intussusception telescopes one bowel segment into another, producing intermittent obstruction and possible vascular compromise. Episodes of distress, pallor or lethargy separated by apparently well intervals are important clues. Vomiting may accompany the episodes, while rectal bleeding can be late. The classic combination of pain, a palpable mass and characteristic bloody stool is not required. A comfortable interval must not be mistaken for resolution of the underlying process.
Apply it
A toddler repeatedly screams and becomes pale, then appears comfortable between attacks. Consider intussusception and arrange urgent assessment rather than dismissing the episodes because the child intermittently looks well.
Common pitfall: Waiting for bloody stool or a palpable mass delays diagnosis. Lethargy may be prominent even when pain is not clearly reported.
40.Why is ultrasound preferred for suspected intussusception?
Ultrasound identifies the bowel-within-bowel appearance without ionising radiation and is the preferred initial investigation for suspected intussusception. A plain abdominal radiograph may answer selected questions about obstruction or perforation, but a normal radiograph does not exclude the diagnosis. Choose the investigation that directly addresses the suspected pathology while providing supportive care and watching for physiological deterioration that would change immediate management.
Apply it
A stable child has recurrent colicky distress and pallor. Request urgent abdominal ultrasound instead of ending the evaluation after a normal plain abdominal radiograph.
Common pitfall: A reassuring test cannot exclude a condition it detects poorly. Imaging should proceed alongside clinical assessment rather than delay resuscitation in a child who becomes unstable.
41.When is enema reduction inappropriate for intussusception?
Enema reduction is inappropriate when perforation, peritonitis, shock or clinical instability is present. These findings suggest compromised bowel or a child requiring resuscitation and urgent surgical management. Suitable reduction should occur in an experienced service with surgical support because perforation is a recognised complication. Eligibility therefore depends on physiology and evidence of bowel injury as well as confirmation of the diagnosis.
Apply it
Ultrasound confirms intussusception in a shocked child with guarding. Resuscitate and obtain urgent surgical management rather than progressing automatically to enema reduction.
Common pitfall: A confirmed diagnosis does not establish suitability for nonsurgical treatment. The child's stability and abdominal findings can change the pathway even when the imaging diagnosis is straightforward.
42.Which oxygen and hydration findings guide bronchiolitis support?
The cited RCH pathway starts nasal-prong oxygen when saturation is persistently below 90%; brief dips below 90% alone do not warrant oxygen. Underlying cardiopulmonary disease may require individual targets. Assess respiratory effort, apnoea, feeding and hydration together. When oral intake is inadequate, nasogastric hydration is generally preferred if tolerated; intravenous fluids may be required when enteral hydration is unsafe or unsuccessful.
Apply it
An infant has persistent saturation of 88% and cannot maintain feeds. Provide low-flow nasal-prong oxygen and assess nasogastric hydration while monitoring work of breathing and response.
Common pitfall: Do not chase brief saturation dips with unnecessary oxygen. An acceptable saturation also cannot establish adequate hydration or exclude clinically important feeding difficulty.
43.Why are bronchodilators and corticosteroids not routine bronchiolitis treatment?
Typical bronchiolitis involves viral small-airway inflammation, oedema and secretions. Wheeze therefore does not automatically imply the asthma-like reversible bronchospasm targeted by bronchodilators. Routine bronchodilators and corticosteroids are not recommended for typical bronchiolitis. Management instead addresses oxygenation, feeding, hydration and respiratory compromise. The clinical syndrome and age-specific presentation determine treatment rather than a single familiar respiratory sound.
Apply it
A previously well infant develops coryza followed by typical bronchiolitis. Assess respiratory effort, saturation and feeding rather than automatically prescribing salbutamol and corticosteroids because wheeze is present.
Common pitfall: Applying an asthma treatment template to every wheezing infant confuses different mechanisms. Avoiding routine medicines does not mean withholding necessary supportive care or reassessment.
44.Why can routine chest radiography mislead in bronchiolitis?
Typical bronchiolitis is usually diagnosed clinically, and routine chest radiography is not recommended. Nonspecific radiographic changes can be mistaken for bacterial pneumonia and encourage unnecessary antibiotics without improving management. Reserve additional investigation for atypical features or suspected complications rather than using imaging automatically to confirm a clinical syndrome. Interpret any image alongside the presentation rather than treating an ambiguous opacity as a standalone diagnosis.
Apply it
An infant has a typical bronchiolitis course without focal or unusual findings. Provide clinical monitoring and supportive care instead of requesting a routine chest radiograph before deciding how to manage feeding and oxygenation.
Common pitfall: More testing does not necessarily reduce uncertainty. An incidental or nonspecific finding can create a misleading bacterial diagnosis and distract from the child's actual support needs.
45.How does corrected age guide assessment of a febrile neonate?
RCH distinguishes corrected age at most 21 days from 22–28 days. At at most 21 days, documented fever requires full septic investigation and empirical intravenous antibiotics despite reassuring appearance or initial blood results. Investigation includes blood, urine and cerebrospinal fluid assessment when safe. Well-appearing infants aged 22–28 days with low-risk inflammatory markers still require admission, but lumbar puncture and empirical antibiotics may be deferred within the supervised pathway.
Apply it
A well 19-day-old with documented fever needs the full septic pathway. A well 25-day-old with low-risk inflammatory markers may follow selective inpatient assessment rather than the identical automatic procedure sequence.
Common pitfall: Do not apply one blanket rule to all infants under 28 days. Selective inpatient deferral is not permission for routine discharge, and instability always requires immediate treatment.
46.When should lumbar puncture wait in a febrile neonate?
When lumbar puncture is indicated, obtain cerebrospinal fluid promptly if safe, ideally before antibiotics. Haemodynamic or respiratory instability makes resuscitation and immediate antimicrobial treatment the priorities. Obtain feasible cultures without delaying treatment and reconsider lumbar puncture after stabilisation and resolution of contraindications. This preserves the diagnostic objective while avoiding an unsafe procedure or a clinically important delay in sepsis treatment.
Apply it
A febrile neonate has poor perfusion and respiratory compromise. Stabilise, obtain feasible cultures and give timely empirical antibiotics; defer lumbar puncture until the infant is safe for the procedure.
Common pitfall: A complete investigation set is not required before treating an unstable infant. Deferral should prompt later reassessment of the indication rather than permanent abandonment of cerebrospinal fluid evaluation.
Mental health12.5%
47.Which sleep change points toward mania?
Reduced need for sleep is more discriminating than difficulty sleeping alone. A person may sleep very little yet remain energised, with elevated or irritable mood, increased activity, rapid speech and a sustained change from baseline. Insomnia usually involves unwanted sleeplessness with fatigue or distress. Assess the complete episode, its duration and collateral history rather than diagnosing mood elevation from one sleep symptom.
Apply it
A patient sleeps only a few hours but feels unusually energetic and starts multiple ambitious projects. Ask about mood, speech, spending, judgement and the sustained departure from usual functioning.
Common pitfall: Sleep restriction from work or anxious exhaustion is not equivalent to reduced need for sleep. One energetic day cannot establish a manic or hypomanic episode.
National Institute of Mental Health: Bipolar Disorder · Bipolar-disorder.aspx
48.How do duration and severity distinguish mania from hypomania?
Under the commonly used DSM framework, mania generally lasts at least seven days, or any duration if hospitalisation is necessary; hypomania requires at least four consecutive days. The required abnormal mood, increased energy or activity and associated symptoms must also be present. Mania causes marked impairment and can include psychosis, whereas hypomania does not cause marked impairment or psychosis. Exclude substance and medical explanations.
Apply it
Eight days of elevated mood, reduced sleep, excessive spending and grandiose delusions with major functional loss support mania. Duration alone would not establish the diagnosis without the symptom pattern and consequences.
Common pitfall: Psychosis during an elevated episode rules out hypomania. Do not delay urgent assessment of severe symptoms merely because seven days have not elapsed.
National Institute of Mental Health: Bipolar Disorder · Bipolar-disorder.aspx
49.Why does lifetime mood history determine bipolar classification?
Bipolar I requires a lifetime manic episode. Bipolar II requires hypomanic and major depressive episodes without a manic episode. Current depression alone cannot determine the classification. Ask about previous sustained increases in energy, reduced need for sleep, unusual behaviour and impairment. Records and collateral accounts may reveal episodes the person did not recognise as illness, while substance and medical explanations must also be considered.
Apply it
A depressed patient recalls hospitalisation for severe elevation and grandiose delusions. Clarify that past episode before assigning a depressive diagnosis because genuine mania changes the lifetime classification.
Common pitfall: Today's symptoms cannot replace longitudinal assessment. Ordinary mood variation, transient excitement or brief enthusiasm should not be retrospectively labelled hypomania without the required episode pattern.
50.Which medical and substance factors can mimic mood elevation?
Medical conditions, prescribed medicines and substances can produce symptoms resembling mania or hypomania. Review thyroid disease, stimulant exposure, medication changes and the temporal relationship between exposure and symptoms. Assessment should establish whether the episode is better explained by a primary mood disorder or another cause. A characteristic symptom cluster still requires this aetiological evaluation rather than immediate assignment of a lifelong bipolar diagnosis.
Apply it
A patient develops new sleeplessness, increased activity and rapid speech after a medication change. Assess the exposure timeline, medical symptoms and prior independent mood episodes while addressing immediate impairment and safety.
Common pitfall: Identifying a possible contributor does not prove causation or eliminate urgent care needs. Substance exposure and a primary mood disorder can coexist, so longitudinal assessment remains necessary.
51.What distinguishes delirium from a stable cognitive disorder?
Delirium involves an acute change in attention and awareness with a fluctuating course, often accompanied by other cognitive disturbance. It may be hyperactive, hypoactive or mixed; quiet withdrawal can be as significant as agitation. Establish baseline cognition through collateral information. Dementia increases vulnerability and can coexist with delirium, but does not explain an abrupt deterioration. Investigate underlying illness, medicines and other reversible precipitants.
Apply it
An older inpatient becomes newly inattentive and intermittently drowsy over one day. Family describe a clear departure from baseline. Assess delirium and its causes rather than attributing the change to age.
Common pitfall: Agitation is not required. A known dementia diagnosis should increase vigilance for acute change rather than provide a reason to stop investigating.
Australian Commission on Safety and Quality in Health Care: Delirium Clinical Care Standard
52.Why is delirium management primarily cause-directed and non-drug?
Identify and treat delirium precipitants while supporting orientation, hydration, mobility, sleep and sensory function. The Australian Delirium Clinical Care Standard does not recommend routine antipsychotics. Exceptional short-term use may be considered when non-drug strategies have failed and there is imminent risk of harm to the patient or others. Assess and document anticipated benefits and harms, discuss treatment and seek informed consent whenever possible, use the lowest appropriate dose for the shortest duration, and monitor response and adverse effects. A single dose may suffice; repeated treatment requires a documented review and cessation plan.
Apply it
For overnight distress without imminent harm, address pain, urinary retention, hypoxia, missing hearing aids and environmental disturbance, using reassurance and family support. If dangerous behaviour persists despite de-escalation and supervision, assess whether exceptional medication use is justified. Monitor sedation, breathing and behavioural response, and reassess before further doses.
Common pitfall: Distress or confusion alone does not establish the prescribing exception. Sedation can conceal deterioration and cause harm. Document when medication should stop, review before discharge and prevent inadvertent continuation after the immediate risk resolves.
Australian Commission on Safety and Quality in Health Care: Delirium Clinical Care Standard
53.How should current suicidal thoughts change immediate care?
Current suicidal thoughts require immediate safety assessment and urgent evaluation. Ask directly about present thoughts, intent, plans, access to means, previous behaviour and support. Maintain supervision during acute assessment and reduce access to dangerous means. The discussion must lead to a concrete disposition decision. Protective factors contribute to assessment but cannot independently cancel current risk or substitute for evaluation of intent and access.
Apply it
An outpatient reports current suicidal thoughts, intent and access to a planned method. Maintain supervision, address access to means and arrange urgent mental health safety evaluation.
Common pitfall: A promise to remain safe is not a substitute for assessment. Apparent calm, a written plan or supportive relatives cannot independently establish that discharge is safe.
National Institute of Mental Health: Adult Outpatient Brief Suicide Safety Assessment Guide
Population health12.5%
54.What makes consent informed and voluntary?
Consent requires a voluntary decision made with understanding of the proposed intervention, expected benefits, material risks, reasonable alternatives and the option of declining. Explore what matters to the person and allow meaningful questions. A signed form records part of the process but does not establish understanding or freedom from pressure. The person must have capacity for the particular decision, supported by appropriate communication.
Apply it
Before an elective procedure, ask the patient to explain its purpose and alternatives and check whether they feel able to decline. Resolve unanswered questions before relying on the signed form.
Common pitfall: Silence, attendance or a signature does not independently establish informed agreement. Family enthusiasm or clinical preference must not replace the patient's own voluntary choice.
Australian Commission on Safety and Quality in Health Care: Informed consent
55.How should communication barriers be addressed before consent?
Use plain language, suitable interpreters, sensory aids and accessible formats to make the consent discussion understandable. Ask the person to explain key information in their own words rather than relying on a nod or a yes-or-no question. Limited English, hearing loss and unfamiliar terminology can impair communication without implying impaired decision-making capacity. Address these barriers before concluding that the person cannot decide.
Apply it
A patient cannot describe the procedure after an English-only discussion. Arrange a suitable interpreter, repeat the explanation and check understanding before assessing whether valid consent can be obtained.
Common pitfall: A translated form alone may not resolve misunderstanding. An accompanying relative does not automatically become the decision maker because they communicate more easily with the team.
Australian Commission on Safety and Quality in Health Care: Informed consent
56.Why is capacity specific to the decision and time?
Assess whether the person can understand relevant information, consider its significance and communicate a choice for the particular decision at that time, using appropriate support. A person may manage a simple choice while struggling with a more complex one, or regain capacity after delirium or another reversible impairment improves. Diagnosis, age and disagreement with advice do not independently establish incapacity.
Apply it
A patient recovering from delirium can explain a simple wound-care choice but struggles with a complex operation. Support and assess each decision separately, allowing reassessment when reversible impairment improves.
Common pitfall: An apparently unwise refusal may still be valid. A previous capacity assessment for another decision or another time cannot automatically determine the present decision.
Australian Commission on Safety and Quality in Health Care: Informed consent
57.How should participation be supported before substitute consent is considered?
Maximise the person's participation by improving communication, treating reversible barriers and allowing suitable time and support. If capacity remains absent for the decision, identify the lawful substitute decision-making process in the relevant Australian jurisdiction. Continue involving the person to the extent possible rather than excluding them from discussion. Family relationship or physical presence alone does not establish legal authority to provide substitute consent.
Apply it
A patient with fluctuating cognition faces a non-urgent decision. Address pain and sensory barriers and reassess during a clearer period; if substitute consent remains necessary, verify the appropriate authority.
Common pitfall: Moving directly to family consent can bypass a person's supported decision-making abilities. Conversely, informal agreement from a relative does not establish compliance with jurisdiction-specific substitute arrangements.
Australian Commission on Safety and Quality in Health Care: Informed consent
58.When should a non-immune pregnant patient receive MMR?
MMR is a live attenuated vaccine and is contraindicated during pregnancy. Identify rubella susceptibility antenatally, provide counselling and arrange vaccination after birth. Breastfeeding does not prevent appropriate postpartum MMR vaccination. The decision depends on the patient's current reproductive situation rather than treating pregnancy and breastfeeding as equivalent restrictions. A documented postpartum plan helps prevent loss of the opportunity to protect against future risk.
Apply it
Antenatal testing identifies rubella susceptibility. Defer MMR during pregnancy and arrange postpartum vaccination, including when the patient plans to breastfeed.
Common pitfall: The need for protection does not override the pregnancy contraindication. Deferral during pregnancy should not become indefinite omission after birth, and breastfeeding alone is not a reason to postpone appropriate vaccination.
59.How is surveillance positive predictive value calculated?
Positive predictive value is the proportion of people identified as cases who truly have the condition. Divide confirmed true cases among those identified by everyone identified as a case, then multiply by 100. The denominator therefore includes true-positive and false-positive identifications. PPV measures the correctness of positive identification rather than the completeness of detection, and depends on case definitions, verification and the underlying disease frequency.
Apply it
A system flags 120 people and verification confirms disease in 90. Positive predictive value is 90 divided by 120, or 75%; the remaining 30 are false-positive identifications.
Common pitfall: Using all true cases in the population as the denominator calculates sensitivity instead. High PPV does not demonstrate that the system detects most cases.
CDC Principles of Epidemiology: Characteristics of Well-Conducted Surveillance
60.How does surveillance sensitivity reveal missed cases?
Sensitivity is the proportion of all true cases that the surveillance system detects. Its denominator includes detected and missed true cases. Restrictive definitions or incomplete reporting can produce convincing positive reports while missing many genuine cases. Evaluate sensitivity separately from positive predictive value. Estimating missed cases requires information beyond the system's positive reports, such as independent case ascertainment or another suitable data source.
Apply it
Independent assessment identifies 200 true cases, of which routine surveillance detected 150. Sensitivity is 150 divided by 200, or 75%, meaning one quarter of true cases were missed.
Common pitfall: Accurate confirmed reports do not prove comprehensive detection. High positive predictive value can coexist with low sensitivity when only a narrow subset of true cases is captured.
CDC Principles of Epidemiology: Characteristics of Well-Conducted Surveillance
What to focus on during revision
The following are CertMedbry study suggestions. Use the official outline to check the full scope of your examination.
- Use the official outline to distribute study across all six domains and extend beyond this selective guide.
- Recognise treatment boundaries involving potassium before insulin, persistent hypoxaemia, neonatal corrected age and severe pregnancy hypertension.
- Challenge premature exclusions based on modest glucose, normal spirometry, negative FAST, preserved Doppler flow or absent proteinuria.
- Separate pregnancy location from viability, serum potassium from total-body stores, and surveillance detection from correctness of positive reports.
- Connect time-critical findings to immediate action before investigations that could delay treatment.
- Practise accessible consent, longitudinal mood assessment and concrete responses to current suicide risk.
A practical preparation plan
1. Map the full examination scope
Read the AMC MCQ specifications and organise study under the six official domains. Use their proportions to distribute study time and identify subjects beyond these 60 concepts.
2. Build clinical decision chains
Connect each presenting cue to its mechanism, discriminating investigation and management consequence. Apply Data Gathering, Data Interpretation and Synthesis, and Management to each case.
3. Explain every practice option
Answer the 20 questions independently. Identify the decisive finding and explain why each alternative is less appropriate before reading the explanation.
4. Review decision errors
Record premature exclusions, delayed escalation and confusion between related measures. Revisit the mechanism or criterion responsible for each error.
5. Consolidate and broaden
Use flashcards for spaced recall, then study broader official preparation resources. Apply current Australian clinical guidance and relevant jurisdiction-specific requirements.
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
- AMC Computer Adaptive Test (CAT) Multiple Choice Question (MCQ) Examination
- AMC examinations and assessment
- Examination specifications
- Multiple Choice Question Examination Specifications, V8
- Management of diabetic ketoacidosis and hyperosmolar hyperglycaemic state in adults in the emergency department
- Australian Asthma Handbook: Initial asthma treatment for adults and adolescents after diagnosis
- Australian Asthma Handbook: Diagnosing asthma in adults and adolescents
- ASCIA Guidelines: Acute Management of Anaphylaxis
- Lifeblood: Determining the underlying causes of iron deficiency anaemia
- Lifeblood: Diagnosis and investigation of iron deficiency anaemia
- National Clinical Guideline for Stroke for the UK and Ireland: Acute care
- Lifeblood: Management of suspected transfusion reactions
- Lifeblood: Transfusion-associated circulatory overload
- RACGP: Acute scrotal pain
- RCH Clinical Practice Guidelines: Acute scrotal pain or swelling
- ANZCOR Guideline 9.1.3: First Aid for Burns
- NSW Agency for Clinical Innovation: Mild head injury
- Queensland Clinical Guideline: Hypertension and pregnancy
- Queensland Clinical Guideline: Early pregnancy loss
- Queensland Clinical Guideline: Primary postpartum haemorrhage
- RCH Clinical Practice Guidelines: Intussusception
- RCH Clinical Practice Guidelines: Bronchiolitis
- RCH Clinical Practice Guidelines: Febrile child
- National Institute of Mental Health: Bipolar Disorder
- Australian Commission on Safety and Quality in Health Care: Delirium Clinical Care Standard
- National Institute of Mental Health: Adult Outpatient Brief Suicide Safety Assessment Guide
- Australian Commission on Safety and Quality in Health Care: Informed consent
- Australian Immunisation Handbook: Vaccination for women who are planning pregnancy, pregnant or breastfeeding
- CDC Principles of Epidemiology: Characteristics of Well-Conducted Surveillance
- TGA Medicines Safety Update, Volume 6, Number 5, October 2015
- ASCIA_HP_Adrenaline_Doses_Anaphylaxis_2026.pdf
- Bipolar-disorder.aspx
- ASCIA_HP_Initial_Anaphylaxis_Management_Flowchart_2026.pdf
- downloadpdf
- Psychiatry.org - What Are Bipolar Disorders?
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