Medical Licensing (MD/DO) · Independent exam preparation
PLAB 1: Clinical Decisions and Safe Practice Study Guide
Practise urgent clinical decisions, focused investigation and ethical care for PLAB 1 through 60 explained concepts, clinical questions and active recall cards.
By CertMedbry · Updated 19 October 2026
Learn to distinguish emergencies from routine presentations, select useful investigations and explain safe management decisions at Foundation Year 2 level. This guide focuses on PLAB 1 knowledge and reasoning, with related communication and professional principles relevant to PLAB 2. Its 60 concepts are selective: the current GMC MLA content map defines the full scope. The ten clinical reporting areas organise the material; equal coverage here represents study breadth, not official examination weighting.
Try 20 free practice questionsWhat is the exam format?
Check the question types, timing and outline before planning your revision.
Which part of PLAB does this guide primarily prepare me for?
The primary focus is PLAB 1: applying knowledge to patient care using current UK practice at Foundation Year 2 level. Its scope includes common, important and acute conditions and primary-care management of long-term conditions, excluding advanced GP duties. Knowledge practice also supports PLAB 2 preparation, but practical performance requires additional preparation.
GMC: What is the PLAB 1 exam? · GMC: What is the PLAB 2 exam?
Has the MLA replaced PLAB with a differently named examination?
No. The GMC states that PLAB retains its current name. PLAB 1 meets MLA applied knowledge test requirements, and PLAB 2 meets clinical and professional skills assessment requirements. Both use the MLA content map.
How many questions and answer options does PLAB 1 have, and how long is it?
PLAB 1 has 180 questions in three hours, with five answer options per question. Select the single best answer for each clinical scenario. This guide's 20 four-option questions are independent learning drills.
How is the PLAB 1 pass mark determined?
The GMC sets the pass mark separately for each test using its published standard-setting method. It is not a permanent percentage to apply to every paper. Use the GMC results guidance to understand the pass mark and your reported performance.
How does PLAB 2 differ from PLAB 1?
PLAB 2 is a performance-based clinical and professional skills assessment, described as an OSCE. It has 16 scenarios lasting eight minutes each, involving situations encountered in a Foundation Year 2 role.
Which skills are assessed within PLAB 2 scenarios?
The three marking domains are Data gathering, technical and assessment skills; Clinical management skills; and Interpersonal skills. Practise focused assessment, justified management and communication that involves the patient. MCQs and flashcards cannot reproduce this performance assessment.
Which content-map version applies to this guide?
This guide follows the MLA content map published in October 2025, applicable to assessments from September 2026 and updated in September 2026. The GMC maintains the map as a live document, so check the version applicable to your assessment date.
GMC: MLA content map · GMC: MLA content map, September 2026 update
How do the six MLA domains relate to the ten labels used here?
The six interconnected MLA domains are Areas of clinical practice; Areas of professional knowledge; Clinical and professional capabilities; Practical skills and procedures; Patient presentations; and Conditions. This guide uses the GMC's ten PLAB 1 clinical reporting areas as practical labels. Across them, cases connect presentations, conditions, mechanisms, assessment, management, procedures and professional behaviour.
Do the equal topic allocations here represent official examination weightings?
No. This guide assigns six concepts, two questions and two cards to each reporting area for study breadth. Percentages in the GMC results guidance describe candidate performance within reporting areas; they are not topic allocations. Performance on these learning questions does not predict passing.
GMC: Your PLAB 1 results · GMC: MLA content map, September 2026 update
Does completing these 60 concepts cover the full examination?
No. The official content map is the full scope, and its listed conditions are indicative rather than exhaustive. Extend study to the remaining presentations, conditions, professional knowledge and procedures. Safe practice, managing uncertainty and holistic care centred on the person underpin the map.
GMC: MLA content map, September 2026 update · GMC: About the MLA content map
PLAB is the GMC assessment for international medical graduates seeking to demonstrate knowledge and skills for UK practice. It retains its name while meeting MLA requirements: PLAB 1 meets the applied knowledge test requirements and PLAB 2 meets the clinical and professional skills assessment requirements. These independently authored learning materials are not official examination items.
Outline used: Current PLAB scope verified on 2026-10-10: GMC MLA content map, published October 2025, effective for assessments from September 2026, last updated September 2026. The workbook label maps to the existing PLAB test; MLA compliance has not created a separate replacement examination.
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.
Reproductive healthnot stated
1.When should early-pregnancy pain suggest an ectopic pregnancy?
An ectopic pregnancy develops outside the uterine cavity, most commonly in a fallopian tube. Unilateral lower abdominal pain, vaginal bleeding or brown discharge in someone who could be pregnant should prompt assessment, even without a previously positive pregnancy test. Symptoms alone cannot determine pregnancy location. In a stable patient, assessment uses pregnancy testing, ultrasound and sometimes serial pregnancy-hormone measurements to distinguish an intrauterine pregnancy, an ectopic pregnancy and an unresolved early pregnancy.
Apply it
A patient with a late period describes left-sided pelvic pain and light spotting. She has not tested for pregnancy and looks well. Arrange prompt pregnancy assessment rather than assuming menstrual pain from the bleeding pattern.
Common pitfall: A small amount of vaginal bleeding does not exclude an ectopic pregnancy. Visible blood loss also gives no reliable measure of internal bleeding.
NHS: Ectopic pregnancy · Royal College of Obstetricians and Gynaecologists: Ectopic pregnancy
2.Which findings make suspected ectopic pregnancy an immediate emergency?
Tubal rupture can cause major bleeding into the abdomen. Sudden severe abdominal pain, faintness, collapse or shoulder-tip pain in a potentially pregnant patient should raise concern for rupture. Shoulder-tip pain can reflect irritation from blood within the abdomen rather than a shoulder disorder. Emergency assessment and resuscitation take priority when the patient is unstable; serial hormone measurements belong to diagnostic assessment of selected stable patients and must not delay emergency treatment.
Apply it
A patient with a positive pregnancy test develops severe pelvic pain, shoulder-tip discomfort and collapse. Treat this as possible ruptured ectopic pregnancy and activate emergency care while assessing circulation, rather than arranging a routine scan.
Common pitfall: Do not wait for a scheduled repeat hormone result when collapse suggests internal bleeding. Apparent diagnostic uncertainty does not make physiological instability safe.
Royal College of Obstetricians and Gynaecologists: Ectopic pregnancy · NHS: Ectopic pregnancy
3.How should a previous ectopic pregnancy change advice about a future pregnancy?
A previous ectopic pregnancy increases the likelihood of another, but many people subsequently have a successful pregnancy. The useful preventive action is early contact with maternity or early-pregnancy services after a new positive test, so pregnancy location can be assessed. New pain or bleeding still requires prompt review. Counselling should separate an increased recurrence risk from certainty of recurrence and should acknowledge the emotional impact of the earlier pregnancy loss.
Apply it
Someone previously treated for an ectopic pregnancy asks whether a new positive test means the same problem has returned. Explain that recurrence is possible, arrange early assessment and discuss symptoms requiring urgent help.
Common pitfall: Neither unconditional reassurance nor a prediction of inevitable recurrence is justified. A previous successful pregnancy also does not remove the need to assess new symptoms.
NHS: Ectopic pregnancy · Royal College of Obstetricians and Gynaecologists: Ectopic pregnancy
4.Which symptoms suggest pre-eclampsia needs urgent assessment?
Pre-eclampsia is a pregnancy-related hypertensive disorder that can affect several organs and threaten both maternal and fetal wellbeing. Severe headache, visual disturbance, pain below the ribs, vomiting or sudden swelling warrant urgent assessment, particularly in the second half of pregnancy. These symptoms require blood-pressure measurement and clinical evaluation rather than diagnosis by symptoms alone. Deterioration can occur even when a patient previously attended routine antenatal checks without a recognised problem.
Apply it
At 32 weeks, a patient reports a persistent severe headache and flashing lights. She attributes both to poor sleep. Arrange urgent maternity assessment rather than offering analgesia alone or waiting for her next routine appointment.
Common pitfall: Swelling alone is not a reliable diagnostic test, and lack of swelling does not exclude serious disease. Combine symptoms with objective maternal assessment.
5.Why are blood pressure and urine checked when a pregnant patient feels well?
Early pre-eclampsia may produce no noticeable symptoms. Antenatal blood-pressure measurement and urine testing can reveal hypertension and protein leakage before the patient recognises illness. Protein in urine is an important assessment finding, but the clinical problem is broader than a urine abnormality: maternal organs and fetal wellbeing may also be affected. Abnormal screening findings therefore require appropriate maternity assessment rather than reassurance based solely on the patient's comfortable appearance.
Apply it
A patient feels entirely well at an antenatal visit, but her blood pressure is raised and urine testing shows protein. Explain why further assessment matters despite the absence of headache, pain or visual symptoms.
Common pitfall: Feeling well cannot override abnormal surveillance findings. Conversely, a single urine result should not substitute for assessment of blood pressure and the wider clinical picture.
6.When can pre-eclampsia remain relevant after delivery?
Pre-eclampsia can first become apparent after birth, and existing disease may still require treatment and monitoring postpartum. Delivery does not justify dismissing a new severe headache, visual disturbance or upper abdominal pain. A recently delivered patient with these symptoms needs urgent assessment, including blood pressure and evaluation for complications. Advice at discharge should make clear that pregnancy-related warning symptoms remain important after the baby has been born, including after an apparently uncomplicated delivery.
Apply it
Five days after delivery, a patient develops severe headache and blurred vision. Her antenatal blood pressure was normal. Arrange urgent assessment for a postpartum hypertensive disorder instead of assuming all pregnancy-related risks have ended.
Common pitfall: A normal antenatal record does not exclude postpartum onset. Do not label severe postpartum headache as exhaustion without checking for serious associated features.
Renal and urologynot stated
7.How do hypoperfusion, intrinsic injury and obstruction cause acute kidney injury?
Acute kidney injury can result from reduced renal perfusion, injury within the kidney or obstruction to urine drainage. Vomiting and diarrhoea can reduce circulating volume and filtration; prolonged hypoperfusion may progress to intrinsic tissue injury. Intrinsic causes damage renal tissue directly, while obstruction impedes urine outflow. These categories guide assessment of losses, circulation, medicines, urine findings and possible obstruction. They can coexist, so identifying dehydration does not complete the assessment.
Apply it
An older adult with diarrhoea, poor intake and reduced urine output needs assessment of perfusion and renal results. Also review medicines and consider obstruction when the history or examination suggests impaired drainage.
Common pitfall: Do not prescribe fluids for every creatinine rise without assessing volume status. Fluid depletion, intrinsic injury and obstruction require different responses, and excessive fluid can harm a patient who is already overloaded.
NHS: Acute kidney injury · KDIGO-2012-AKI-Guideline-English.pdf
8.Which quantitative changes meet the KDIGO definition of acute kidney injury?
KDIGO 2012 defines AKI by any one of three findings: serum creatinine increases by at least 26.5 micromol/L within 48 hours; creatinine increases to at least 1.5 times baseline, known or presumed to have occurred within the preceding seven days; or urine volume is below 0.5 mL/kg/hour for six hours. The magnitude and time interval both matter. Compare with baseline and assess urine output; an isolated abnormal creatinine does not establish an acute change.
Apply it
Creatinine rising from 80 to 112 micromol/L over 36 hours increases by 32 micromol/L and meets the 48-hour criterion. For a 70 kg adult, 0.5 × 70 = 35 mL/hour. A measured 180 mL over six hours equals 180 ÷ 70 ÷ 6 = 0.43 mL/kg/hour and meets the urine-output criterion.
Common pitfall: The creatinine criteria use 'at least', while the urine criterion uses 'below'. Exactly 0.5 mL/kg/hour does not meet that urine criterion. Chronic kidney disease does not exclude superimposed AKI.
9.Why is medication review part of acute kidney injury management?
During hypovolaemia, filtration depends partly on compensatory changes in renal arteriolar tone. NSAIDs inhibit prostaglandin-mediated afferent arteriolar dilatation, reducing blood flow into the glomerulus. ACE inhibitors and angiotensin receptor blockers reduce angiotensin-mediated efferent arteriolar constriction, lowering the pressure maintained within the glomerulus. Either mechanism can reduce filtration pressure during dehydration. Diuretics can compound the problem through volume depletion, particularly alongside diarrhoea or poor intake. Reduced renal clearance can also cause other medicines to accumulate. Review prescribed, over-the-counter and recently started products, with individualised decisions about temporary withholding, dose adjustment and restarting.
Apply it
A patient with diarrhoea and rising creatinine takes an ACE inhibitor and a diuretic, and has added over-the-counter ibuprofen for back pain. Fluid losses and diuresis reduce circulating volume, while ibuprofen impairs afferent dilatation and the ACE inhibitor reduces efferent constriction. Assess volume status and review each medicine's indication, with a documented monitoring and restart plan.
Common pitfall: These medicines do not all injure the kidney through the same mechanism. Avoid permanent blanket cessation: withholding and restarting require assessment of volume status, renal function, potassium and the original treatment indication.
NHS: Acute kidney injury · Medication%20Safety%20-%20Indicators%20Specification%20(Aug19).pdf · Non-steroidal anti-inflammatory drugs (NSAIDs): reminder on renal failure and impairment - GOV.UK
10.Which features distinguish kidney infection from an isolated lower urinary infection?
Kidney infection commonly develops when bacteria ascend from the lower urinary tract. Fever, shivering, pain in the side or back and nausea or vomiting suggest upper-tract involvement, especially when accompanied by painful or frequent urination. Lower urinary symptoms may be absent, so their absence cannot exclude kidney infection. The distinction matters because systemic illness and complications are more concerning than in a straightforward infection confined to the bladder.
Apply it
A patient initially had dysuria but now has fever, rigors and pain beneath the ribs on one side of the back. Reassess for kidney infection rather than treating the new symptoms as unrelated muscular pain.
Common pitfall: Do not require every urinary symptom to be present. Fever and flank pain can indicate kidney infection even when the patient denies burning urination.
11.When does suspected kidney infection require urgent escalation?
Kidney infection can progress to serious systemic illness. Confusion, marked drowsiness, difficulty speaking or other signs of severe deterioration require emergency assessment rather than routine outpatient follow-up. Persistent vomiting or inability to keep fluids and medicines down also changes the suitability of oral treatment. Assess the patient's overall condition, hydration and ability to take treatment; the label of a urinary infection must not obscure evidence that the patient is becoming critically unwell.
Apply it
An older adult being treated for a kidney infection becomes newly confused and difficult to wake. A relative asks whether to wait until the antibiotics finish. Arrange emergency assessment because the clinical state has changed.
Common pitfall: New confusion is not safely explained by age alone. Existing antibiotic treatment does not remove the need to respond immediately to clinical deterioration.
12.How should response to kidney-infection treatment be reviewed?
Reassess if symptoms have not started improving within 48 hours of starting antibiotics. Arrange earlier assessment for deterioration, systemic illness or inability to retain fluids or medicines; the 48-hour threshold is not a reason to delay assessment of worsening illness. Review symptoms, hydration, illness severity, doses actually retained and urine culture susceptibility results. Consider resistant infection, another diagnosis and complications that may require further investigation or hospital treatment. Advise completing the prescribed antibiotic course unless the treating clinician changes it, while making clear that reassessment must not wait until the course ends.
Apply it
A patient still has unchanged fever and flank pain 48 hours after starting antibiotics for kidney infection. Arrange reassessment now and review available culture results rather than advising completion of the course before review. If repeated vomiting prevents fluids or doses staying down earlier, assess urgently because oral treatment and hydration may no longer be adequate.
Common pitfall: Starting to improve within 48 hours does not mean every symptom must have resolved. Conversely, a prescription does not guarantee effective treatment when doses are vomited or the organism is resistant. Course-completion advice must always accompany specific reassessment instructions.
NHS: Kidney infection · Diagnosis of urinary tract infections: quick reference tools for primary care - GOV.UK
Neurosciences and senses (including skins)not stated
13.Why do resolved focal neurological symptoms still require urgent assessment?
A transient ischaemic attack causes temporary neurological dysfunction from an interruption of blood supply. Sudden facial weakness, unilateral arm weakness or speech disturbance can resolve before assessment, but resolution does not remove the risk of a subsequent stroke. A recent suspected TIA requires urgent specialist assessment rather than reassurance from a normal examination. Establish what happened, when it started and whether every symptom has resolved, because persistent symptoms require an acute stroke pathway.
Apply it
A patient describes ten minutes of sudden right-arm weakness and difficulty speaking earlier today. Examination is now normal. Treat the history as potentially significant and arrange urgent stroke-specialist assessment rather than routine review.
Common pitfall: A normal examination after the event does not disprove a TIA. Do not let symptom resolution convert an urgent vascular presentation into routine reassurance.
NHS: Transient ischaemic attack · National Clinical Guideline for Stroke: Acute care
14.What immediate action follows a recent suspected TIA with fully resolved symptoms?
The National Clinical Guideline for Stroke recommends immediate aspirin 300 mg for a suspected TIA unless contraindicated, alongside stroke-specialist assessment within 24 hours of symptom onset. This approach addresses early recurrence risk while the diagnosis and prevention plan are clarified. It applies to the recent, fully resolved presentation described; it is not a substitute for emergency stroke assessment when symptoms continue. Check contraindications rather than treating aspirin as universally suitable.
Apply it
A clinician assesses fully resolved focal symptoms that began six hours ago. There is no aspirin contraindication. Give the recommended immediate aspirin and organise specialist assessment within 24 hours of onset, rather than scheduling a routine appointment.
Common pitfall: Urgent referral does not mean omitting immediate indicated treatment. Conversely, giving aspirin must not replace specialist assessment or justify delay when neurological deficits persist.
15.How does ongoing weakness change the suspected TIA pathway?
A TIA is transient; ongoing focal neurological deficits must be treated as possible acute stroke. Sudden facial droop, arm weakness or speech disturbance should trigger emergency assessment even when symptoms appear mild or have partly improved. Record onset or the last time the patient was known to be well, because time influences specialist treatment decisions. Do not delay emergency transfer to see whether the remaining deficit eventually resolves on its own.
Apply it
A patient says an episode of weakness has mostly passed, but one arm still drifts and speech remains slurred. Activate emergency stroke care instead of applying a pathway intended for completely resolved symptoms.
Common pitfall: Partial improvement is not complete resolution. A mild residual deficit can still represent an acute stroke and should not be downgraded to routine follow-up.
NHS: Transient ischaemic attack · National Clinical Guideline for Stroke: Acute care
16.Which painful-eye symptoms suggest acute glaucoma?
Acute glaucoma can cause a sudden rise in pressure within the eye, threatening the optic nerve. A painful red eye with blurred vision, coloured halos, headache and nausea or vomiting is an emergency pattern. The combination of eye pain and visual disturbance is more discriminating than redness alone. Urgent ophthalmic assessment is needed because delay can lead to permanent visual loss; symptomatic treatment for headache or nausea does not address the ocular cause.
Apply it
A patient presents with a red painful eye, blurred vision and halos around lights, followed by vomiting. Arrange emergency eye assessment rather than attributing all symptoms to migraine or a simple surface-eye infection.
Common pitfall: Nausea can accompany an eye emergency. Do not focus on gastrointestinal symptoms while overlooking a painful red eye and a new change in vision.
17.How should a non-blanching rash change assessment of a feverish patient?
A non-blanching rash does not fade when pressure is applied. In a feverish child, this is an emergency warning sign, particularly with drowsiness, altered responsiveness or breathing difficulty. Describe the skin finding and assess the whole patient rather than diagnosing from a rash label alone. A rash that fades does not override other severe warning signs, and absence of a rash does not make a seriously unwell child safe.
Apply it
A feverish child has new spots that remain visible under pressure and is becoming difficult to wake. Arrange emergency help rather than waiting for the rash to spread or for an antipyretic to work.
Common pitfall: Blanching assessment is one observation, not a standalone exclusion test for serious illness. Do not delay emergency action while repeatedly examining the rash.
18.What can glaucoma treatment preserve, and what can it not restore?
Glaucoma treatment aims to lower pressure within the eye and prevent further damage to the optic nerve. Drops, laser treatment or surgery may be used according to the clinical situation. Existing visual loss is generally not reversible, which makes early detection and sustained treatment important even when the patient feels no immediate benefit. Explain the preventive purpose of treatment so that absence of symptoms does not encourage the patient to stop it.
Apply it
A patient stops prescribed glaucoma drops because vision feels unchanged after several weeks. Explain that treatment is intended to protect remaining vision, and arrange review of adherence, technique and any adverse effects affecting regular use.
Common pitfall: Lack of perceived visual improvement does not mean treatment is ineffective. Do not promise that pressure reduction will recover vision already lost through optic-nerve damage.
Musculoskeletalnot stated
19.When should an acutely painful swollen joint suggest septic arthritis?
Septic arthritis is infection within a joint and can cause rapid damage. A suddenly painful, swollen joint with restricted movement, particularly with fever or systemic illness, requires urgent assessment. The presentation can resemble crystal arthritis or another inflammatory condition, so a familiar history of joint disease must not automatically determine the diagnosis. Assess the speed of onset, joint findings and overall condition, and use an urgent hospital pathway when infection is suspected.
Apply it
A patient with previous gout develops a hot swollen knee, fever and severe pain on movement. The current episode still requires urgent assessment for joint infection rather than automatic treatment as another uncomplicated gout flare.
Common pitfall: Previous gout does not protect against infection. A diagnostic label from an earlier episode should not override new systemic illness or unusually severe joint symptoms.
20.How do joint aspiration and drainage contribute to managing a suspected infected joint?
Joint aspiration obtains fluid through a needle for investigation, helping establish whether infection is present and identify the organism. Removing infected fluid also contributes to treatment; further drainage may require a procedure in hospital. Explain the purpose of sampling and drainage, obtain consent and coordinate them with urgent antibiotic treatment through the hospital team. Routine blood tests alone cannot settle the cause of an acutely inflamed joint.
Apply it
In a community clinic, a patient has a hot swollen knee and fever. Arrange urgent hospital assessment, explaining that fluid may need to be sampled and drained. Do not delay transfer to obtain routine outpatient blood results.
Common pitfall: Aspiration for diagnosis and adequate drainage for source control are related but distinct aims. A sample being taken does not establish that all necessary treatment has been completed.
21.Why may septic arthritis need both antibiotics and drainage?
Antibiotics address the bacterial infection, while drainage removes infected fluid from the joint. Hospital treatment may therefore involve intravenous antibiotics and aspiration or a procedure to drain the joint, followed by further treatment and rehabilitation. Pain relief alone cannot eradicate infection or protect the joint from ongoing damage. The presence of an effective treatment option reinforces the importance of early recognition and prompt referral rather than prolonged observation of a suspected infection.
Apply it
A patient asks why hospital admission is needed when analgesia has reduced knee pain. Explain that symptom relief does not remove infected joint fluid or treat bacteria, and that antibiotics and drainage may both be necessary.
Common pitfall: Improved pain after analgesia is not evidence that infection has resolved. Do not substitute anti-inflammatory treatment or rest for management of a suspected infected joint.
22.Which joint pattern raises suspicion of rheumatoid arthritis?
Rheumatoid arthritis is an inflammatory joint disease in which persistent synovitis is a key assessment finding. Painful swelling in several joints, especially small hand or foot joints, with prolonged stiffness after rest should raise suspicion. Clinical distribution and persistence matter more than any isolated laboratory result. Early specialist assessment allows the diagnosis and treatment plan to be established before preventable damage and functional loss accumulate, even when initial tests are unrevealing.
Apply it
A patient reports weeks of morning hand stiffness and has persistent swelling across several small joints. Treat the examination as evidence of possible inflammatory arthritis and arrange appropriate referral instead of explaining everything as mechanical overuse.
Common pitfall: Pain alone is less specific than persistent synovitis. Do not ignore objective swelling because symptoms fluctuate or the patient can still perform some daily activities.
NHS: Rheumatoid arthritis—diagnosis · North Bristol NHS Trust: Early Inflammatory Arthritis
23.Why does negative rheumatoid factor not exclude rheumatoid arthritis?
Rheumatoid factor supports assessment but is neither present in every patient with rheumatoid arthritis nor specific enough to diagnose the condition alone. Inflammatory markers can also be normal despite clinically important inflammatory arthritis. Interpret blood tests alongside persistent synovitis, joint distribution and the clinical history. A negative result reduces neither the importance of examining the joints nor the need for specialist assessment when the clinical pattern remains strongly suggestive.
Apply it
A patient has persistent swollen finger joints, but rheumatoid factor and inflammatory markers are normal. Explain that these tests do not rule out inflammatory arthritis and continue the referral decision using the clinical findings.
Common pitfall: Do not describe a negative antibody result as proof of non-inflammatory disease. Conversely, a positive result without a compatible clinical picture is not a complete diagnosis.
NHS: Rheumatoid arthritis—diagnosis · North Bristol NHS Trust: Early Inflammatory Arthritis
24.When should persistent synovitis receive urgent rheumatology referral?
Persistent synovitis of uncertain cause warrants specialist consideration, with urgent referral particularly important when small joints of the hands or feet or more than one joint are affected. Normal inflammatory markers or negative rheumatoid serology must not delay referral in this pattern. The clinical objective is early assessment of potentially damaging inflammatory disease. Local referral documents support this urgency principle, but their administrative routes should not be assumed to apply across every UK service.
Apply it
Several small hand joints remain swollen at repeat review, and the patient struggles to dress. Refer urgently despite negative rheumatoid factor rather than waiting for another blood-test panel before seeking specialist assessment.
Common pitfall: Referral should not be conditional on a positive antibody test. Repeated investigation can create avoidable delay when persistent small-joint synovitis already establishes the need for assessment.
Hertfordshire and West Essex NHS clinical guidance: Hip Pain in Adults — Inflammatory arthritis section · North Bristol NHS Trust: Early Inflammatory Arthritis
Mental healthnot stated
25.Which changes suggest mania rather than ordinary happiness?
Mania involves an abnormal episode of elevated or irritable mood with changes such as increased energy, reduced need for sleep, rapid speech, racing thoughts and impulsive behaviour. The discriminating issue is the cluster of changes and its effect on functioning, judgement and safety, rather than cheerfulness alone. Spending, sexual disinhibition or unrealistic plans may expose the person to harm. Assessment should explore baseline behaviour, duration, collateral information and current risks.
Apply it
A usually cautious person sleeps very little without feeling tired, speaks rapidly and spends savings on implausible ventures. Assess for mania and its consequences rather than interpreting the change simply as newfound confidence.
Common pitfall: Reduced need for sleep differs from insomnia with exhaustion. Do not diagnose mania from enthusiasm alone or overlook impairment because the patient describes feeling excellent.
26.Why does the longitudinal mood history matter in bipolar assessment?
Bipolar disorder involves episodes of altered mood, which may include depression and periods of mania or hypomania. A cross-sectional account of low mood can miss previous elevated episodes that change diagnostic interpretation and treatment planning. Ask about earlier periods of unusually high energy, reduced sleep, disinhibition and impaired judgement, and consider collateral information with appropriate consent. Episodic change from the person's usual functioning is more informative than a vague description of a variable personality.
Apply it
During assessment for depression, a patient recalls a previous period of little sleep, excessive activity and reckless spending that relatives found alarming. Explore that episode carefully rather than assuming the history represents only recurrent unipolar depression.
Common pitfall: Everyday mood variation is not equivalent to distinct mood episodes. Equally, an elevated episode may be missed if questioning covers only the current depressive symptoms.
27.How do vulnerability and immediate danger change the response to suspected mania?
Suspected mania requires assessment of practical consequences as well as symptom recognition. Marked disinhibition, functional impairment and financial or sexual vulnerability support urgent mental health assessment even without stated suicidal intent. Immediate danger to the patient or others requires emergency escalation. Ask about access to money, exploitation, driving, aggression, self-care and support. The urgency follows the whole risk picture; it should not depend on whether the person appears cheerful or agrees that anything is wrong.
Apply it
A patient with probable mania is being financially exploited and has stopped attending work, but denies suicidal thoughts. Arrange urgent mental health assessment and address vulnerability; use emergency services if an immediate safety threat emerges.
Common pitfall: A negative suicide screen does not establish overall safety. Mania can create serious harm through disinhibition, impaired judgement, exploitation or inability to care for oneself.
NHS: Bipolar disorder · West London NHS Trust: Referral guidance
28.What distinguishes a hallucination from an unusual belief?
A hallucination is a sensory experience occurring without the corresponding external stimulus, such as hearing a voice when nobody is speaking. A delusion concerns a strongly held false belief rather than perception. Clarify what the patient actually experiences before assigning terminology, and explore distress, frequency, context and associated risks. The symptom description helps organise assessment, but a hallucination alone does not establish schizophrenia or exclude a medical, substance-related or other psychiatric cause.
Apply it
A patient reports repeatedly hearing a voice commenting on his actions while alone in a quiet room. Clarify the perceived sound and its content, then assess context and safety rather than immediately assigning a specific psychotic disorder.
Common pitfall: Symptom identification and diagnosis are different tasks. Do not equate every unusual sensory report with schizophrenia or dismiss it without exploring the patient's experience.
29.How should a strongly held persecutory belief be explored?
A delusion is a strongly held false belief that is not readily changed by contrary evidence. Assessment should establish the belief's content, conviction, effect on behaviour and associated distress while considering cultural context. A persecutory belief may lead the person to avoid food, confront others or feel unsafe. Calm exploration is more useful than argument: acknowledge distress without confirming the alleged threat, and assess whether the belief creates immediate risk or requires urgent specialist help.
Apply it
A patient believes neighbours are poisoning every meal and has stopped eating. Explore the conviction and consequences, assess nutrition and safety, and seek appropriate mental health assessment without endorsing the alleged poisoning.
Common pitfall: Directly agreeing with an unverified threat can reinforce the belief. Aggressive contradiction may also damage engagement and prevent useful assessment of distress and risk.
30.Why must new psychotic symptoms prompt assessment of possible causes?
Psychosis describes symptoms such as hallucinations and delusions, not a single underlying disease. It may occur in psychiatric conditions, after substance use or because of physical illness. Assessment therefore includes onset, medication and substance exposure, mood symptoms, physical health and changes in awareness or cognition. This broader approach prevents premature diagnostic closure. Urgent help is particularly important when symptoms create danger, severe distress or an inability to meet basic needs.
Apply it
A patient develops new hallucinations shortly after a major change in substance use. Assess substance exposure and physical health alongside psychiatric symptoms rather than assuming the presentation establishes a lifelong primary psychotic disorder.
Common pitfall: A psychiatric symptom does not rule out a physical or substance-related cause. Avoid selecting a permanent diagnostic label before examining onset, context and associated changes.
Gastrointestinalnot stated
31.Why must gluten usually remain in the diet during coeliac testing?
Coeliac disease is an immune reaction to gluten that damages the small-intestinal lining. Diagnostic blood tests and intestinal assessment depend on detecting changes associated with gluten exposure. Starting a gluten-free diet before testing can reduce those changes and make results less reliable. Someone already avoiding gluten needs an agreed diagnostic plan rather than an unsupported interpretation of a negative test. Symptom improvement after dietary restriction alone does not establish the diagnosis.
Apply it
A patient with bloating and diarrhoea plans to remove gluten before a coeliac blood test. Explain why testing is usually completed while still eating gluten and agree a diagnostic plan before dietary restriction begins.
Common pitfall: Feeling better without gluten is not proof of coeliac disease. A negative test obtained after restriction may also be less informative than it first appears.
32.How are coeliac blood tests connected to specialist assessment?
Blood testing is an important initial step in investigating coeliac disease, but results must be interpreted with symptoms, gluten exposure and the diagnostic pathway. Positive results can lead to specialist assessment and, in adults, consideration of small-intestinal biopsy to confirm the diagnosis. Continuing clinical suspicion despite negative testing also deserves review. Distinguish screening evidence from a completed diagnosis rather than treating one result as automatically conclusive in every clinical situation.
Apply it
An adult with compatible symptoms has positive coeliac serology and asks whether any further assessment is needed. Explain the role of specialist confirmation and maintain an appropriate diet for testing until the diagnostic plan is agreed.
Common pitfall: Do not present every positive screening result as the entire diagnostic process. Equally, persistent compatible symptoms should not be ignored solely because initial testing was negative.
33.Who should be offered coeliac testing because of family history?
Having a parent, sibling or child with coeliac disease is itself an indication to offer testing, including when the person has no symptoms. These are first-degree relatives, whose increased risk warrants assessment without waiting for gastrointestinal symptoms. Family history does not establish the diagnosis. Testing still requires an appropriate diagnostic pathway, with attention to gluten exposure because starting a gluten-free diet beforehand can make results less reliable.
Apply it
An asymptomatic adult asks about testing after her sister is diagnosed with coeliac disease. Offer testing because she is a first-degree relative, and explain the importance of continuing gluten during assessment unless a clinician agrees a different diagnostic plan.
Common pitfall: Do not restrict family testing to symptomatic relatives. Equally, increased familial risk does not justify diagnosing coeliac disease or prescribing lifelong gluten avoidance without assessment.
34.What can bright blood or coffee-ground vomit indicate?
Vomited blood may appear bright red or resemble dark coffee grounds after alteration by stomach contents. Both appearances can indicate upper gastrointestinal bleeding and need medical assessment. Appearance alone cannot establish the bleeding rate, cause or physiological impact. Ask about faintness, abdominal pain, black stools and relevant medicines, and assess circulation. A patient with shock features requires emergency care even when the visible amount seems small or the vomit is dark rather than fresh red.
Apply it
A patient brings a photograph of dark granular vomit and says it cannot be blood because it is not red. Recognise possible coffee-ground haematemesis and assess symptoms and circulation rather than reassuring from colour alone.
Common pitfall: Dark blood is not necessarily harmless old bleeding. Neither the photograph nor the estimated volume substitutes for assessment of the patient's physiological condition.
35.What does initial resuscitation of unstable upper gastrointestinal bleeding involve?
Assess airway, breathing and circulation immediately, including whether ongoing haematemesis or reduced consciousness threatens airway protection. Obtain intravenous access, take blood for assessment and transfusion preparation, and begin appropriate intravenous fluid resuscitation while arranging urgent senior and specialist help. Reassess circulation and response repeatedly. Persistent instability or major ongoing bleeding requires consideration of a major-haemorrhage response, blood-component support and critical-care review; repeated fluid administration alone is not a complete response to uncontrolled haemorrhage.
Apply it
A patient vomiting blood is pale, hypotensive and faint. Begin resuscitation, obtain intravenous access and blood samples, and involve senior clinicians. If hypotension persists with continued bleeding, escalate haemorrhage management and critical-care support while coordinating source control.
Common pitfall: Do not wait for endoscopy or laboratory results before addressing shock. A transient response to fluids does not establish that bleeding has stopped.
36.How do endoscopic source control and subsequent monitoring complement resuscitation?
Endoscopy can identify the bleeding lesion and provide haemostatic treatment. The BSG-led care bundle recommends urgent endoscopy after resuscitation for haemodynamically unstable bleeding. Resuscitation and endoscopy must be coordinated; ongoing instability requires senior, endoscopy and critical-care planning rather than indefinite delay while pursuing perfect observations. After treatment, continue monitoring circulation, further haematemesis or melaena and relevant blood results. Recurrent bleeding or deterioration requires prompt reassessment and renewed source-control planning.
Apply it
Following initial resuscitation, a patient undergoes endoscopic treatment of an upper gastrointestinal bleed. Later tachycardia, faintness and fresh haematemesis should trigger assessment for rebleeding rather than reassurance that the procedure has already treated the source.
Common pitfall: Successful initial haemostasis does not eliminate rebleeding risk. Improvement after fluids and completion of endoscopy are milestones, not reasons to stop monitoring.
Endocrine metabolic, and clinical haematologynot stated
37.Which thyroid-test pattern supports primary hypothyroidism?
In primary hypothyroidism, the thyroid produces insufficient hormone, so pituitary stimulation through thyroid-stimulating hormone rises. A raised TSH with a low free T4 therefore supports primary hypothyroidism. Interpret both results together rather than diagnosing from tiredness or TSH alone. The pattern differs from a raised TSH with normal free T4, and from low free T4 without an appropriately raised TSH, which requires consideration of a different clinical context or mechanism.
Apply it
A patient with cold intolerance and constipation has raised TSH and low free T4. The combined biochemical pattern supports primary thyroid failure more strongly than symptoms alone or either laboratory result interpreted in isolation.
Common pitfall: Fatigue is nonspecific, and every abnormal TSH does not mean the same disorder. Do not ignore free T4 or assume all low thyroid-hormone patterns are primary.
Newcastle Hospitals Laboratories: TSH, serum · NHS: Underactive thyroid
38.Why is levothyroxine used for an underactive thyroid?
Levothyroxine replaces thyroid hormone that the body is not producing adequately. Treatment addresses the hormone deficiency rather than stimulating recovery through a short symptomatic course. Many patients require long-term replacement, with dose adjustment guided by thyroid blood tests and the clinical situation. Improvement may take time, so a lack of immediate change does not justify unsupervised dose increases. Explain the purpose of regular treatment and the need to review possible under-replacement or over-replacement.
Apply it
A patient stops levothyroxine once constipation improves, believing the condition has been cured. Explain that improvement can reflect successful hormone replacement and that ongoing treatment and blood-test review may still be necessary.
Common pitfall: Symptom improvement is not evidence that thyroid hormone production has recovered. Avoid stopping replacement or escalating the dose without considering laboratory monitoring and clinical review.
39.How do you calculate an initial adult DKA insulin infusion from weight and concentration?
The JBDS March 2023 adult DKA regimen starts a fixed-rate intravenous insulin infusion at 0.1 units/kg/hour. Multiply weight in kilograms by 0.1 to obtain units/hour, then divide by the prepared concentration in units/mL to obtain mL/hour. Its preparation of 50 units of soluble human insulin made up to a total of 50 mL gives 1 unit/mL. This calculation accompanies fluid treatment, potassium assessment and monitoring; it is not a standalone treatment plan.
Apply it
For a 70 kg adult: 70 kg × 0.1 units/kg/hour = 7 units/hour. At 50 units in a total of 50 mL, concentration is 1 unit/mL, so the pump rate is 7 ÷ 1 = 7 mL/hour. Confirm weight, insulin identity, total volume, concentration and pump setting.
Common pitfall: Units/hour and mL/hour are only numerically equal at 1 unit/mL. 'Made up to 50 mL' specifies final volume. Do not apply the initial rate unchanged throughout treatment; JBDS advises considering a reduction when glucose falls below 14 mmol/L.
40.How is diabetic ketoacidosis produced and biochemically confirmed?
Insufficient insulin promotes fat breakdown and ketone production, causing metabolic acidosis. The JBDS March 2023 adult diagnostic criteria require all three components: glucose above 11 mmol/L or known diabetes; blood ketones above 3 mmol/L or urine ketones at least 2+; and venous pH below 7.3 and/or bicarbonate below 15 mmol/L. Vomiting, abdominal pain, deep breathing and reduced alertness are warning features. Known diabetes matters because DKA can occur without markedly raised glucose.
Apply it
A person with known diabetes has glucose 9 mmol/L, blood ketones 4.2 mmol/L and venous pH 7.22. This meets the stated criteria despite glucose being below 11 mmol/L: known diabetes, ketonaemia and acidosis are all present.
Common pitfall: High glucose alone does not establish DKA, and a modest glucose result does not exclude it. Ketonaemia must be interpreted with acid-base status and the diabetes or glucose criterion.
NHS: Diabetic ketoacidosis · JBDS%2002%20DKA%20Guideline%20with%20qr%20code.pdf
41.Which home blood-ketone results require advice or emergency assessment?
NHS action thresholds distinguish early warning from emergency risk. Blood ketones below 0.6 mmol/L are normal. At 0.6–1.5 mmol/L, check again after two hours; obtain immediate diabetes-team advice if the person feels unwell. Results of 1.6–3 mmol/L require immediate diabetes-team advice even if the person feels well. Above 3 mmol/L requires emergency assessment. Follow the individual's sick-day plan alongside these thresholds. These are home action thresholds, not diagnostic criteria: DKA confirmation also assesses diabetes or glucose status and acidosis. Serious symptoms warrant urgent help even without a ketone result.
Apply it
A person who feels well measures blood ketones of 1.1 mmol/L: follow the sick-day plan and repeat the measurement after two hours. If the person feels unwell, obtain immediate diabetes-team advice. A result of 2.1 mmol/L requires immediate advice even without symptoms, and 3.4 mmol/L requires emergency assessment.
Common pitfall: Do not leave a mildly raised result without a monitoring plan or wait for symptoms when the concentration already requires escalation. A ketone warning result alone does not prove that diagnostic acidosis is present.
NHS: Diabetic ketoacidosis · JBDS%2002%20DKA%20Guideline%20with%20qr%20code.pdf
42.What are the initial hospital treatment priorities and resolution targets in adult DKA?
Initial treatment combines intravenous fluid replacement, intravenous insulin and repeated assessment of potassium, glucose, ketones and acid-base status, with treatment of the precipitating cause. Insulin suppresses ketone production and moves potassium into cells, so serum potassium can fall dangerously during treatment and replacement must follow measured results. Glucose may fall before ketoacidosis resolves; intravenous glucose may then permit continued insulin safely. JBDS defines resolution by blood ketones below 0.6 mmol/L and venous pH above 7.3.
Apply it
During treatment, glucose falls to 12 mmol/L but ketones remain 2.4 mmol/L and pH is 7.25. DKA has not resolved. Review fluids, potassium and insulin, add glucose as indicated by the regimen and continue monitored treatment.
Common pitfall: Do not stop insulin solely because glucose improves. During illness at home, reduced food intake also does not remove insulin requirements: continue insulin with sick-day monitoring and obtain advice about adjustments.
JBDS%2002%20DKA%20Guideline%20with%20qr%20code.pdf · NHS: Diabetic ketoacidosis
Child and adolescent healthnot stated
43.How does a young infant's age change the significance of fever?
Fever in a very young infant has a lower threshold for urgent medical assessment than fever in an otherwise well older child. The NHS advises urgent help for a baby under three months with a temperature of 38°C or higher, and for a baby aged three to six months with a temperature of 39°C or higher. Age-specific thresholds supplement clinical assessment; they do not mean a lower reading makes a seriously unwell infant safe.
Apply it
A seven-week-old baby has a measured temperature of 38.1°C but is still taking some feeds. Arrange urgent medical assessment because the age-temperature combination matters even before more obvious signs of severe illness develop.
Common pitfall: Do not apply an older child's home-care threshold to a young infant. A temperature below an age threshold also cannot override concerning behaviour, breathing or hydration.
44.Which accompanying signs make a feverish child an emergency?
The seriousness of childhood fever depends on the child's overall condition, not temperature alone. Difficulty breathing, marked drowsiness, abnormal responsiveness, a non-blanching rash or other severe warning signs require emergency action. Assess interaction, colour, breathing and hydration as well as the measured temperature. A modest fever can accompany serious illness, while a higher temperature in an alert older child does not by itself identify the cause or establish the same level of immediate danger.
Apply it
A child with fever becomes difficult to wake and develops spots that do not fade under pressure. Arrange emergency help rather than waiting to see whether another dose of antipyretic medicine lowers the temperature.
Common pitfall: A fall in temperature after medicine does not exclude serious infection. Do not let the number on the thermometer outweigh altered responsiveness or a concerning rash.
45.Which DKA regimen should be used for a 17-year-old?
For 16–18-year-olds, JBDS states that the regimen should follow the team managing care: use the adult DKA guideline when managed by the adult diabetes team, and the paediatric guideline when managed by the paediatric team. The protocols differ, particularly in fluid replacement. Establish the responsible team and use one coherent regimen rather than mixing adult fluid instructions with paediatric insulin or monitoring instructions.
Apply it
A 17-year-old with DKA is admitted under a paediatric team. Use its paediatric DKA pathway and involve the relevant specialists, rather than applying the adult infusion example solely because the patient is close to 18.
Common pitfall: Age alone does not select the adult regimen within this 16–18-year range. A worked adult prescribing calculation must not be transferred automatically into paediatric care.
46.How does bronchiolitis commonly progress from a cold-like illness?
Bronchiolitis is a viral infection affecting the small airways, usually in babies and young children. It often begins with cold-like symptoms before cough, faster breathing, wheeze or difficulty feeding develops. Symptoms can worsen over the early days rather than improving immediately after the runny nose settles. Assessment should therefore consider the trajectory, respiratory effort and intake. A previous reassuring assessment does not guarantee that an infant remains safe if breathing or feeding subsequently deteriorates.
Apply it
A baby initially had a runny nose but now coughs more, breathes faster and takes shorter feeds. Reassess the evolving respiratory illness rather than assuming that yesterday's mild cold assessment still describes today's condition.
Common pitfall: Early mild symptoms do not guarantee a mild course. Do not use the label of a common viral illness to dismiss worsening breathing or reduced intake.
47.Which breathing signs in bronchiolitis require emergency help?
Severe work of breathing, pauses in breathing, blue or grey colour around the lips or tongue, and reduced responsiveness are emergency signs in an infant with bronchiolitis. Visible recession and grunting indicate effort to move air through narrowed small airways. Do not wait for feeding advice or routine review when these signs appear. The immediate decision is emergency assessment and respiratory support as needed, rather than home observation based on the illness being viral.
Apply it
A baby with a cough develops grunting, marked chest recession and pauses in breathing. The parent asks about clearing the nose. Arrange emergency help because the respiratory warning signs take priority over routine comfort measures.
Common pitfall: Wheeze volume is not a reliable measure of safety. Severe effort, apnoea, abnormal colour or reduced responsiveness matters more than whether breathing sounds especially noisy.
48.Why are feeding and wet nappies important in bronchiolitis assessment?
An infant with bronchiolitis may struggle to coordinate feeding with increased respiratory effort. Reduced intake can lead to dehydration, while fewer wet nappies provide a practical clue that fluid intake is inadequate. Ask about the change from usual feeding, vomiting, alertness and urine output rather than judging severity from cough alone. Smaller, more frequent feeds may help a mildly affected infant, but marked feeding reduction or dehydration requires medical assessment rather than continued home measures alone.
Apply it
A baby with bronchiolitis is less breathless while asleep but has taken much less milk and has fewer wet nappies. Assess hydration and feeding adequacy rather than using the quieter breathing period as the only reassurance.
Common pitfall: A child can need assessment because of poor intake even without dramatic wheeze. Do not treat feeding history as secondary to respiratory sounds alone.
Cardiorespiratorynot stated
49.Which symptom pattern should raise concern for acute coronary syndrome?
A heart attack commonly causes chest discomfort described as pressure, tightness or heaviness, sometimes spreading to the arms, jaw, neck or back. Breathlessness, sweating, nausea or faintness may accompany it, and symptoms are not always dramatic. The decision is to recognise possible acute coronary syndrome and arrange emergency assessment, rather than wait for a textbook description. Symptom character informs suspicion but cannot confirm or exclude myocardial injury without appropriate investigation.
Apply it
A patient develops central chest pressure with sweating and discomfort extending to the jaw. It began at rest and persists. Arrange emergency assessment for possible acute coronary syndrome rather than a routine appointment for indigestion.
Common pitfall: Do not require severe pain or every classic associated symptom. Atypical wording and a history of indigestion do not reliably exclude an acute cardiac event.
50.Why are ECG and high-sensitivity troponin complementary in suspected acute coronary syndrome?
An ECG assesses cardiac electrical patterns that may indicate acute ischaemia, while high-sensitivity cardiac troponin detects myocardial injury. Both contribute to early assessment, but neither should be interpreted without symptom timing and the clinical picture. Troponin pathways may require further sampling, and an initial result alone is not universally conclusive. The supported principle is prompt ECG assessment and troponin sampling for suspected acute coronary syndrome, without transferring local assay thresholds into every clinical setting.
Apply it
A patient with new chest pressure has no clear diagnostic change on the initial ECG. Continue an appropriate acute coronary syndrome assessment, including high-sensitivity troponin, rather than declaring a cardiac cause excluded by that tracing alone.
Common pitfall: A normal initial ECG does not exclude all acute coronary syndromes. Troponin indicates myocardial injury and must not be treated as a context-free diagnosis of its cause.
Oxford University Hospitals: High-sensitivity troponin · North Bristol NHS Trust: Suspected Acute Coronary Syndrome Guideline
51.What does cardiac rehabilitation add after a heart attack?
Recovery after a heart attack includes reducing future cardiovascular risk and rebuilding safe function, not simply surviving the acute admission. Cardiac rehabilitation can combine supervised activity, education, risk-factor management and psychological support. It helps patients understand medicines, return to activity appropriately and address anxiety after the event. Advice should be individualised to clinical recovery rather than recommending prolonged inactivity or an immediate unrestricted return to every previous level of exertion.
Apply it
After discharge, a patient avoids all walking because another heart attack feels inevitable. Explain the role of cardiac rehabilitation in a supported return to activity, risk reduction and confidence, and connect the patient with the recovery plan.
Common pitfall: Rest alone is not a complete recovery strategy. Do not assume that a physically stable discharge means the patient needs no education, rehabilitation or psychological support.
52.Which features suggest pulmonary embolism rather than a simple chest infection?
Pulmonary embolism occurs when a clot obstructs blood flow in the pulmonary circulation. Sudden breathlessness, chest pain worse on breathing, coughing blood or collapse should raise suspicion. Symptoms overlap with other conditions, so the pattern prompts urgent assessment rather than proving the diagnosis. Ask about leg symptoms and thromboembolic risk factors as well as respiratory complaints. Severe breathing difficulty, chest pain with marked deterioration or collapse requires emergency help rather than routine outpatient investigation.
Apply it
A patient develops abrupt breathlessness and sharp pain on inspiration after a period of reduced mobility. Consider pulmonary embolism and arrange urgent assessment instead of assuming every painful cough represents an uncomplicated respiratory infection.
Common pitfall: Pleuritic pain is not specific to infection. Absence of fever or a dramatic chest examination does not make sudden unexplained breathlessness safe to dismiss.
53.How are leg-vein thrombosis and pulmonary embolism connected?
A pulmonary embolus commonly originates from a clot in a deep vein, often in the leg, that travels to the lungs. Pain, swelling or redness in one leg can therefore strengthen suspicion when new breathlessness or pleuritic chest pain develops. Reduced mobility and other clotting risks add context, but no single risk factor is required. The absence of obvious leg symptoms does not exclude a clot already affecting the pulmonary circulation.
Apply it
A patient with recent unilateral calf swelling now reports sudden breathlessness. Link the two presentations as possible venous thromboembolism and arrange urgent assessment rather than treating the leg and chest complaints as unrelated problems.
Common pitfall: Do not require visible calf swelling before considering pulmonary embolism. A clot may cause little recognised leg discomfort, and risk assessment must include the respiratory presentation.
54.What do anticoagulants achieve in pulmonary embolism treatment?
Anticoagulants reduce the blood's ability to form further clot and help prevent an existing clot from enlarging while the body breaks it down. They do not instantly remove the obstruction or guarantee immediate symptom resolution. Treatment therefore combines the prescribed anticoagulant plan with monitoring and advice about deterioration and bleeding. Understanding the mechanism helps explain why adherence matters even after symptoms improve and why new severe symptoms still need urgent assessment during treatment.
Apply it
A patient prescribed anticoagulation for pulmonary embolism asks why breathlessness has not disappeared after the first dose. Explain prevention of clot extension and further clotting while reviewing the clinical course and any signs of deterioration.
Common pitfall: Anticoagulation is not immediate mechanical clot removal. Do not reassure away worsening symptoms, and do not stop treatment merely because pain or breathlessness has improved.
Ethics and othernot stated
55.What makes consent a meaningful decision rather than a signature?
Meaningful consent involves an exchange of information that supports a voluntary decision about a particular intervention. Explain the likely benefits, relevant risks, reasonable alternatives and the option of no treatment, taking account of what matters to the patient. Check understanding and allow questions rather than assuming a signed form establishes an informed choice. The information needed depends on the decision and the individual; consent is a continuing process as circumstances or preferences change.
Apply it
A patient signs a procedure form but says she does not know that a non-procedural alternative exists. Pause to discuss reasonable options and her priorities before treating the signature as sufficient authority to proceed.
Common pitfall: A completed form documents part of a process but cannot replace discussion. Do not assume that standard information covers every risk important to this patient.
56.How is decision-making capacity assessed in England and Wales?
Mental Capacity Act 2005 sections 1–3 require a presumption of capacity and all practicable steps to support decision-making before concluding that someone cannot decide. For the particular decision at the relevant time, establish both an impairment of, or disturbance in, the functioning of mind or brain and inability to understand, retain, use or weigh relevant information, or communicate a decision by any means. Crucially, that inability must arise because of the impairment or disturbance. Diagnosis, disability or an unwise decision alone does not establish incapacity.
Apply it
An adult with a psychiatric diagnosis understands the proposed treatment and alternatives, weighs their consequences and communicates a choice after support. The diagnosis alone cannot establish incapacity. If delirium prevents understanding despite practicable support, document the functional inability and how delirium causes it.
Common pitfall: Do not omit the causal connection between impairment and inability. Disagreement with medical advice is not incapacity, and short retention can be sufficient when it enables the person to make the decision.
ukpga_20050009_en.pdf · GMC: Mental capacity · GMC: Decision making and consent
57.Why must communication support precede a conclusion about incapacity?
Difficulty hearing, speaking or understanding the language used can obstruct communication without removing decision-making capacity. Provide accessible information, suitable communication aids, an interpreter where needed and enough time for the person to respond. Where possible, address reversible barriers such as pain or distress. Assessment should test the person's ability with appropriate support, not their ability to navigate an unsuitable consultation. A communication impairment and an inability to decide are different clinical findings.
Apply it
A patient with hearing impairment gives inconsistent answers during a noisy consultation. Move to a suitable setting and use effective communication support before deciding whether the person understands the proposed treatment and can make the choice.
Common pitfall: Failure to hear or express a response is not automatically failure to understand. Do not allow an avoidable communication barrier to become evidence of incapacity.
58.When must a competent adult's refusal of treatment be respected?
An adult with capacity may refuse treatment, including treatment that could preserve life, when the decision is informed and voluntary and no applicable statutory exception authorises intervention. Explore understanding, reasons and possible pressure without coercion, explain consequences and discuss acceptable alternatives. Serious risk does not itself remove capacity or create permission to override refusal. Apply the relevant UK jurisdiction's law and document the discussion, assessment and agreed continuing care.
Apply it
An adult with current capacity understands that declining a recommended intervention could be fatal, remains consistent and is free from pressure. With no applicable statutory exception, respect the refusal while offering appropriate alternatives and ongoing care.
Common pitfall: A life-threatening consequence does not automatically invalidate refusal. Equally, do not accept apparent refusal without checking understanding, voluntariness, capacity and any relevant legal exception.
GMC: Decision-making models · GMC: Decision making and consent
59.When should a patient be told about a harmful error?
The professional duty of candour requires openness when something has gone wrong with care and caused, or may cause, harm or distress. Explain the known facts, apologise, discuss possible consequences and provide appropriate support or remedy. Disclosure should be timely and should not wait for the full investigation to finish. Distinguish established facts from uncertainty and arrange updates, so honesty does not become speculation or an unsupported attribution of blame.
Apply it
A prescribing error has been identified and may have harmed a patient, but the incident review is incomplete. Explain what is known now, apologise and outline support and follow-up rather than postponing the conversation until every cause is established.
Common pitfall: Uncertainty about root cause does not justify silence about known facts. Avoid speculation, but do not use an ongoing investigation to delay appropriate disclosure.
GMC: Being open and honest with patients when things go wrong · GMC: The professional duty of candour
60.How does candour extend beyond the first apology?
Candour includes ongoing communication with the patient and constructive cooperation with reporting and review processes. An apology acknowledges what has happened but does not replace clinical support, appropriate corrective action or learning to reduce recurrence. Keep the patient informed as relevant facts become clearer and participate honestly in the investigation. Distinguish the patient's need for explanation and care from the organisation's need to understand the incident; both require action rather than assuming one process completes the other.
Apply it
After explaining an error and apologising, a clinician is asked to contribute to the incident review. Cooperate openly, ensure the patient receives planned updates and address continuing care needs instead of treating the initial conversation as completion.
Common pitfall: An internal report does not replace a patient conversation, and an apology does not replace reporting or follow-up. Candour requires both openness and appropriate subsequent action.
What to focus on during revision
The following are CertMedbry study suggestions. Use the official outline to check the full scope of your examination.
- Distinguish unstable emergencies from stable diagnostic pathways: ruptured ectopic pregnancy, ongoing stroke, shock with haematemesis, severe bronchiolitis and diabetic ketoacidosis.
- Use discriminating evidence rather than isolated labels: persistent synovitis despite negative serology, resolved focal symptoms despite a normal examination, and thyroid results interpreted together.
- Connect mechanisms to management: renal perfusion and medication review, insulin deficiency and ketones, infected joint fluid and drainage, and anticoagulation preventing clot extension.
- Practise patient-centred decisions: supported capacity assessment, informed refusal, meaningful consent and timely candour in the relevant UK legal context.
- Navigation — Reproductive health, concepts 1–6: pregnancy location, rupture and hypertensive disease → triage, diagnostic sequencing and counselling. Renal and urology, concepts 7–12: AKI and kidney infection → quantitative diagnosis, urine-output calculation, cause assessment and treatment-route selection.
- Navigation — Neurosciences and senses (including skins), concepts 13–18: focal deficits, painful visual change and non-blanching rash → emergency recognition and preventive treatment. Musculoskeletal, concepts 19–24: hot joints and persistent synovitis → aspiration and drainage decisions, investigation interpretation and referral.
- Navigation — Mental health, concepts 25–30: mood episodes and psychotic symptoms → longitudinal history, symptom description, causal assessment and vulnerability. Gastrointestinal, concepts 31–36: coeliac assessment and bleeding → family testing, diagnostic exposure, resuscitation and endoscopic source control.
- Navigation — Endocrine metabolic, and clinical haematology, concepts 37–42: thyroid feedback and DKA → paired-test interpretation, insulin-infusion calculation, biochemical diagnosis and treatment monitoring. Child and adolescent health, concepts 43–48: infant fever, adolescent DKA and bronchiolitis → age-specific escalation, protocol selection and hydration assessment.
- Navigation — Cardiorespiratory, concepts 49–54: acute coronary syndrome and venous thromboembolism → investigation selection, treatment mechanisms and rehabilitation. Ethics and other, concepts 55–60: consent, capacity, refusal and candour → supported decisions, statutory reasoning and communication.
- Extend beyond these selections using the full MLA content map, including further procedures, prescribing, dermatology, ENT, clinical haematology and adolescent presentations.
A practical preparation plan
1. Map the full assessment scope
Read the current applicable MLA content map and identify presentations, conditions, professional knowledge, capabilities and procedures beyond this selective guide. Use its themes of safe practice, uncertainty and person-centred care to connect topics.
2. Learn each decision with its boundary
For every concept, explain the mechanism, decisive cue and tempting alternative aloud. State what would change urgency: persistent rather than resolved neurological symptoms, collapse rather than stable pelvic pain, or severe feeding and breathing changes in an infant.
3. Complete the questions before reading explanations
Choose one answer using the supplied clinical information. Then account for every alternative, recording whether an error arose from missed evidence, incorrect mechanism, inappropriate urgency or an unsupported assumption.
4. Use spaced active recall
Review the cards over repeated sessions and answer before turning them over. Add a brief explanation of why the principle matters and one circumstance in which a superficially similar presentation would require a different response.
5. Translate knowledge into clinical performance
For PLAB 2 preparation, rehearse focused history, examination or procedural explanation, management and shared discussion with another person. Use the three official marking domains to structure feedback; MCQ accuracy alone does not demonstrate performance competence.
6. Close gaps with current UK guidance
Revisit weak reporting areas and consult relevant clinical guidance for detailed management beyond these core principles. Keep local laboratory thresholds and service referral arrangements tied to their setting rather than treating them as universal rules.
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
- GMC: Professional and Linguistic Assessments Board
- GMC: PLAB and the MLA
- GMC: MLA content map
- GMC: MLA content map, September 2026 update
- GMC: About the MLA content map
- GMC: What is the PLAB 1 exam?
- GMC: What is the PLAB 2 exam?
- GMC: How will you be tested?
- GMC: Your PLAB 1 results
- NHS: Ectopic pregnancy
- NHS: Pre-eclampsia
- NHS: Acute kidney injury
- NHS: Kidney infection
- NHS: Transient ischaemic attack
- NHS: Glaucoma
- NHS: Septic arthritis
- NHS: Rheumatoid arthritis—diagnosis
- NHS: Bipolar disorder
- NHS: Psychosis—overview
- NHS: Coeliac disease—diagnosis
- NHS: Vomiting blood
- NHS: Underactive thyroid
- Newcastle Hospitals Laboratories: TSH, serum
- NHS: Diabetic ketoacidosis
- NHS: Bronchiolitis
- NHS: High temperature in children
- NHS: Heart attack
- NHS: Pulmonary embolism
- GMC: Decision making and consent
- GMC: Mental capacity
- GMC: Decision-making models
- GMC: The professional duty of candour
- National Clinical Guideline for Stroke: Acute care
- Hertfordshire and West Essex NHS clinical guidance: Hip Pain in Adults — Inflammatory arthritis section
- North Bristol NHS Trust: Early Inflammatory Arthritis
- West London NHS Trust: Referral guidance
- Royal College of Obstetricians and Gynaecologists: Ectopic pregnancy
- BSG-led multisociety consensus care bundle for early management of acute upper gastrointestinal bleeding
- Oxford University Hospitals: Troponin I
- Oxford University Hospitals: High-sensitivity troponin
- GMC: Being open and honest with patients when things go wrong
- North Bristol NHS Trust: Suspected Acute Coronary Syndrome Guideline
- KDIGO-2012-AKI-Guideline-English.pdf
- JBDS%2002%20DKA%20Guideline%20with%20qr%20code.pdf
- ukpga_20050009_en.pdf
- Medication%20Safety%20-%20Indicators%20Specification%20(Aug19).pdf
- Non-steroidal anti-inflammatory drugs (NSAIDs): reminder on renal failure and impairment - GOV.UK
- JBDS 02 The Management of Diabetic Ketoacidosis in Adults | The Association of British Clinical Diabetologists
- Diagnosis of urinary tract infections: quick reference tools for primary care - GOV.UK
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