Medical Licensing (MD/DO) · Independent exam preparation
PLAB 1: Applied Clinical Decisions and Professional Practice Study Guide
Practise urgent recognition, diagnostic reasoning and ethical decisions for PLAB 1 with 60 focused concepts, clinical cases, explained questions and recall cards.
By CertMedbry · Updated 19 October 2026
Practise recognising emergencies, distinguishing similar presentations and choosing safe next steps in current UK practice. This guide develops applied knowledge at the Foundation Year 2 level through 60 selective concepts, 20 independent questions and 20 recall cards. The official MLA content map defines the full examination scope; this guide samples that scope through the GMC's ten PLAB 1 feedback areas.
Try 20 free practice questionsWhat is the exam format?
Check the question types, timing and outline before planning your revision.
What knowledge level and clinical setting does PLAB 1 assess?
PLAB 1 assesses applied knowledge using current UK practice, including common, important and acute conditions at Foundation Year 2 level. It includes managing long-term conditions encountered in primary care, while excluding advanced duties expected of a general practitioner.
How many questions are there, what styles are used and how long is the examination?
The actual PLAB 1 has 180 scenario-based questions, each with five answer options, and lasts three hours. This allows an average of one minute per question; practise pacing across a complete paper while allowing time to revisit uncertain answers. The questions in this guide are four-option single-best-answer learning drills. They do not reproduce the full examination format or predict a pass.
How are answers recorded on examination day?
PLAB 1 is a written examination. Candidates record their answers on an answer sheet and must bring HB pencils. Follow the GMC's current [exam-day guidance](https://www.gmc-uk.org/registration-and-licensing/join-our-registers/plab/plab-1-guide/what-can-you-expect-on-the-day) and the instructions for your sitting.
Which content map applies to assessments from September 2026?
The GMC MLA content map published in October 2025, updated in September 2026 and identified as GMC/MLACM/0926 applies from September 2026 onwards. The map is a live document, so check its current version when planning preparation.
GMC: MLA content map · GMC: MLA content map, September 2026 update
How do the six MLA domains relate to the ten areas used in this guide?
The MLA map has six interconnected domains: Areas of clinical practice; Areas of professional knowledge; Clinical and professional capabilities; Practical skills and procedures; Patient presentations; and Conditions. This guide organises selected content using the ten official PLAB 1 feedback areas. Those reporting areas do not replace the map's structure or its full scope. Safe practice, managing uncertainty and holistic person-centred care run across the material.
Are official percentage weights available for these ten feedback areas?
The official MLA content map does not specify percentage assessment weights for these ten areas. Percentages on PLAB 1 feedback describe candidate performance, not the proportion of examination questions assigned to each area. For balanced study coverage, this guide assigns six concepts, two questions and two flashcards to each feedback area. This is an editorial allocation.
GMC: Your results · GMC: MLA content map, September 2026 update
Has PLAB 1 been renamed, and how does it differ from PLAB 2?
PLAB means Professional and Linguistic Assessments Board. The workbook label 'PLAB Part 1' refers here to the examination the GMC calls PLAB 1. MLA alignment does not establish a separate replacement examination: PLAB 1 meets the Applied Knowledge Test requirements, while PLAB 2 meets the clinical and professional skills assessment requirements. This guide addresses PLAB 1.
GMC: Professional and Linguistic Assessments Board · GMC: PLAB and the MLA
Which official preparation resources should guide study?
Use the current MLA content map to define breadth and the GMC's professional standards to develop examinable professional judgement. Use clinical sources to support clinical decisions: a topic's appearance in the content map establishes scope but does not itself establish a treatment recommendation.
GMC: What resources should you use to prepare for PLAB 1? · GMC: MLA content map
PLAB 1 is the GMC applied knowledge examination within the PLAB pathway for doctors who qualified abroad. It meets the MLA Applied Knowledge Test requirements and retains the PLAB 1 name. These are independently authored CertMedbry learning materials, not GMC examination items or endorsed materials.
Outline used: Verified for 2026-10-10: GMC MLA content map, published October 2025, updated September 2026 and applicable to assessments from September 2026 onwards. The workbook label 'Professional and Linguistic Assessments Board (PLAB) Part 1' maps to the GMC examination named 'PLAB 1'. PLAB 1 remains PLAB 1 and meets the MLA Applied Knowledge Test requirements; this alignment does not establish 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 raise concern for ectopic pregnancy?
An ectopic pregnancy develops outside the womb, most often in a fallopian tube, where it cannot develop normally. Early symptoms can include lower abdominal pain, often on one side, and vaginal bleeding that differs from a usual period. Pregnancy may not yet have been confirmed. The useful decision is to consider ectopic pregnancy in a potentially pregnant patient with compatible symptoms and arrange urgent assessment rather than attributing the symptoms to menstruation.
Apply it
A patient with a late period reports intermittent right-sided pelvic pain and light brown bleeding. She has not taken a pregnancy test. Consider pregnancy-related pathology and arrange timely assessment rather than diagnosing an unusual period.
Common pitfall: A negative assumption about pregnancy based on contraception or absent confirmation can delay recognition. Contraception lowers pregnancy likelihood but does not make compatible symptoms irrelevant.
2.Which features suggest a ruptured ectopic pregnancy?
Rupture can cause severe internal bleeding and is a medical emergency. Sudden intense abdominal pain, dizziness, fainting or collapse in someone who could be pregnant are particularly concerning. Shoulder-tip pain can accompany internal bleeding and should not be dismissed as an unrelated muscle complaint. The decision changes from arranging routine diagnostic clarification to emergency hospital assessment when these features appear, especially if pain and bleeding preceded the deterioration or the patient appears acutely unwell.
Apply it
A patient with six weeks of amenorrhoea develops severe abdominal pain, shoulder-tip discomfort and near-collapse. Treat possible internal bleeding as the immediate concern and arrange emergency hospital care without waiting for routine outpatient investigations.
Common pitfall: Small-volume vaginal bleeding does not measure the amount of internal bleeding. Apparent external blood loss can be modest despite a life-threatening rupture.
3.How do ectopic pregnancy risk factors influence assessment?
Previous ectopic pregnancy, damage or surgery involving the fallopian tubes, pelvic inflammatory disease and fertility treatment can increase ectopic pregnancy risk. These factors strengthen concern when pain or bleeding occurs, but they are not diagnostic criteria. Many affected patients have no obvious risk factor. Clinical reasoning should therefore combine possible pregnancy, symptoms and physiological condition, using risk history to adjust suspicion rather than to decide whether the condition is possible at all.
Apply it
Two patients have early pregnancy pain and bleeding; one previously had tubal surgery. Her history increases concern, but both require appropriate assessment because an uncomplicated reproductive history does not exclude an ectopic pregnancy.
Common pitfall: Using absence of previous pelvic disease as a rule-out test confuses a risk factor with a necessary cause and can falsely reassure the clinician.
4.What distinguishes pre-eclampsia from gestational hypertension?
Hypertension in pregnancy means systolic blood pressure at least 140 mmHg or diastolic blood pressure at least 90 mmHg. Pre-eclampsia is new hypertension after 20 weeks accompanied by new proteinuria, maternal organ dysfunction or uteroplacental dysfunction. Significant proteinuria includes urine protein:creatinine ratio at least 30 mg/mmol or albumin:creatinine ratio at least 8 mg/mmol. Qualifying maternal findings include creatinine at least 90 micromol/L; ALT or AST above 40 IU/L, with or without right upper quadrant or epigastric pain; platelets below 150 × 10^9/L, haemolysis or disseminated intravascular coagulation. Neurological complications include eclampsia, altered mental status, blindness, stroke, clonus, severe headache or persistent visual scotomata. Uteroplacental dysfunction includes fetal growth restriction, abnormal umbilical artery Doppler findings or stillbirth. Gestational hypertension is new hypertension after 20 weeks without these additional features.
Apply it
At 30 weeks, a previously normotensive patient has repeated blood pressure readings of 148/96 mmHg, no proteinuria and newly elevated ALT of 52 IU/L attributable to the pregnancy disorder. This meets the liver dysfunction criterion for pre-eclampsia. Similarly, new hypertension with creatinine of 94 micromol/L or platelets of 140 × 10^9/L can meet diagnostic criteria despite absent proteinuria. Documented fetal growth restriction provides another qualifying route through uteroplacental dysfunction.
Common pitfall: Diagnostic criteria differ from thresholds guiding admission or birth. ALT above 40 IU/L qualifies diagnostically; NICE separately lists a new persistent ALT rise above 70 IU/L or twice the upper limit of normal as an example of concern warranting admission. Admission also depends on other maternal or fetal concerns. Before 37 weeks, progressive organ deterioration, uncontrolled hypertension despite appropriate treatment or fetal compromise can justify planned early birth; a diagnostic laboratory threshold alone does not mandate immediate delivery. Severe headache, visual disturbance or pain below the ribs requires immediate assessment.
Recommendations | Hypertension in pregnancy: diagnosis and management | Guidance | NICE · NHS: Pre-eclampsia
5.Why can pre-eclampsia remain relevant after birth?
Pre-eclampsia can first appear after the baby has been born, so delivery does not immediately remove the need to recognise its warning symptoms. A severe persistent headache, visual changes or upper abdominal pain in a recently postpartum patient should prompt urgent assessment. The key reasoning step is to retain the pregnancy-related diagnosis across the transition into postnatal care rather than assuming that a new symptom must have an unrelated cause.
Apply it
Four days after giving birth, a patient reports a severe headache and flashing lights. Her symptoms need urgent assessment for postpartum pre-eclampsia even though she is no longer pregnant and has returned home.
Common pitfall: Attributing every postnatal headache to fatigue or disrupted sleep can miss serious disease. Recent childbirth remains relevant context when interpreting neurological or upper abdominal symptoms.
6.How does gestation guide birth timing in pre-eclampsia?
From 37 weeks onwards, NICE recommends initiating birth within 24–48 hours in pre-eclampsia. Before 37 weeks, continue surveillance unless maternal deterioration or fetal compromise indicates earlier birth. Important triggers include uncontrolled hypertension despite appropriate treatment, progressive renal or liver dysfunction, falling platelets, persistent severe neurological symptoms, placental abruption or a non-reassuring fetal assessment. A senior obstetrician should guide timing, with neonatal and anaesthetic planning where needed. Continue postpartum blood pressure and symptom monitoring because complications can persist or first appear after birth.
Apply it
A patient with stable pre-eclampsia reaches 37 weeks: plan to initiate birth within 24–48 hours. At 32 weeks, stable maternal and fetal findings favour surveillance, whereas worsening renal function or a non-reassuring fetal assessment can justify earlier birth despite prematurity.
Common pitfall: Improved blood pressure alone does not settle the delivery decision. After birth, continue monitoring; ask about severe headache and epigastric pain, and arrange the required blood pressure follow-up.
Recommendations | Hypertension in pregnancy: diagnosis and management | Guidance | NICE · NHS: Pre-eclampsia
Renal and urologynot stated
7.How can dehydration cause acute kidney injury?
Acute kidney injury is a sudden reduction in kidney function. Vomiting, diarrhoea, bleeding or other causes of reduced circulating volume can reduce blood flow to the kidneys, impairing filtration. Reduced urine output may accompany the injury, but blood testing is important because symptoms can be nonspecific. The practical decision is to assess volume loss and its cause promptly, rather than interpreting oliguria as an isolated urinary symptom or assuming all kidney injury reflects permanent kidney disease.
Apply it
An older adult has three days of diarrhoea, poor intake and much less urine than usual. Consider reduced kidney perfusion and arrange assessment of hydration, renal function and the underlying illness rather than offering reassurance alone.
Common pitfall: Reduced urine output is a warning sign, not a complete diagnosis. Fluid decisions must consider examination findings, especially when heart failure or fluid overload is possible.
8.Why does suspected acute kidney injury require medication review?
Some medicines can contribute to acute kidney injury, particularly when a patient is dehydrated or otherwise acutely unwell. Relevant groups include non-steroidal anti-inflammatory drugs, ACE inhibitors and diuretics. Medication review identifies potentially contributing drugs and medicines whose handling changes when kidney function falls. The decision is contextual: assess the acute illness, renal function and treatment indications, and determine which medicines need temporary interruption or adjustment with an appropriate restart plan.
Apply it
A patient taking a diuretic and an ACE inhibitor develops vomiting and starts ibuprofen for back pain. Falling urine output should prompt urgent renal assessment and review of all three medicines, including the newly purchased drug.
Common pitfall: Reviewing only prescribed medicines misses over-the-counter NSAIDs. Conversely, a medicine's association with AKI does not justify permanent discontinuation without reviewing its indication and recovery.
9.Which adult findings establish acute kidney injury, and how is its cause investigated?
Adult AKI is detected by any of the following: serum creatinine rising by at least 26 micromol/L within 48 hours; a rise of at least 50% known or presumed to have occurred within seven days; or urine output below 0.5 mL/kg/hour for more than six hours. Compare with baseline and investigate the cause, including volume depletion, intrinsic renal disease and obstruction. Perform urine dipstick testing. Urgent urinary tract ultrasound is indicated when the cause is unidentified or obstruction is a risk; suspected infected obstruction requires immediate imaging.
Apply it
Creatinine rises from 100 to 160 micromol/L within seven days. The increase is 60/100 × 100 = 60%, meeting the creatinine criterion for AKI. If the patient also has difficulty passing urine and lower abdominal discomfort, assess for obstruction rather than attributing the rise to dehydration alone.
Common pitfall: An abnormal creatinine does not identify the cause, and a value within a laboratory reference range can still represent AKI after a sufficient rise from baseline. Oliguria can independently meet the detection criteria.
Recommendations | Acute kidney injury: prevention, detection and management | Guidance | NICE · NHS: Acute kidney injury
10.What makes a ureteric stone a plausible cause of flank pain?
A stone moving through the urinary tract can cause severe pain in the side or abdomen, sometimes extending towards the groin, with nausea, vomiting or blood in the urine. Pain can come in waves as the ureter contracts around the obstruction. These features support urinary tract calculi but do not establish the diagnosis alone. Fever, shivering or marked illness alongside suspected stones raises concern for infection and requires urgent assessment.
Apply it
A patient has severe intermittent flank pain radiating towards the groin and visible blood in the urine. A ureteric stone is plausible; newly reported rigors increase urgency because infection may complicate the urinary obstruction.
Common pitfall: Labelling all flank pain as uncomplicated renal colic can miss infection. Systemic illness changes the risk assessment even when the pain pattern sounds typical.
11.Which imaging approach is used for suspected stones in pregnancy?
Imaging helps identify urinary stones and assess their consequences, but pregnancy changes the initial choice. Ultrasound is generally used in pregnancy because it avoids ionising radiation. The decision should therefore include pregnancy status before selecting a usual adult imaging pathway. Ultrasound can also examine the urinary tract for signs of obstruction, although a clinical assessment remains necessary when symptoms are severe or the patient has features suggesting infection.
Apply it
A patient at 22 weeks of pregnancy presents with flank pain and haematuria and is clinically stable. Ultrasound is the appropriate initial imaging approach for suspected stones while assessment also checks for infection and obstruction.
Common pitfall: Applying the routine non-pregnant adult imaging pathway without asking about pregnancy overlooks a key safety distinction. Imaging choice should reflect both diagnostic need and patient context.
12.How does hydration reduce recurrent kidney stone risk?
Stones can form when substances in urine become concentrated enough to crystallise. Drinking adequate fluid helps keep urine less concentrated and is a central preventive measure after a stone episode. Pale urine is a useful practical indicator for many people. Prevention also depends on the type of stone and individual circumstances, so broad dietary restrictions should not replace an assessment of composition, recurrence and any reason fluid intake needs to be limited.
Apply it
A patient who has passed a stone drinks very little during long shifts and usually has dark urine. Discuss regular fluid intake and an achievable workplace plan, while checking whether any condition requires fluid restriction.
Common pitfall: Assuming every stone requires the same restrictive diet can produce unhelpful advice. Hydration and stone-specific assessment are more useful than indiscriminately excluding many foods.
Neurosciences and senses (including skins)not stated
13.What immediate treatment and referral are required after a suspected TIA?
A TIA causes temporary focal neurological symptoms from interrupted cerebral blood supply. For a suspected TIA with resolved symptoms, offer aspirin 300 mg daily immediately unless contraindicated, and refer immediately for specialist assessment and investigation within 24 hours of symptom onset. Do not use ABCD2 to delay referral. Ongoing focal deficits require the emergency stroke pathway rather than waiting for a TIA clinic appointment; exclude hypoglycaemia during the initial assessment.
Apply it
A patient had sudden right arm weakness and slurred speech for 15 minutes two hours ago and now has a normal examination. With no aspirin contraindication, start aspirin 300 mg daily immediately and arrange specialist assessment within 24 hours of onset. If weakness recurs or persists, activate the emergency stroke pathway.
Common pitfall: Resolution does not remove urgency. Do not postpone aspirin for routine imaging in an otherwise typical suspected TIA, and do not apply the TIA aspirin pathway indiscriminately to an ongoing suspected stroke before the appropriate emergency assessment.
Recommendations | Stroke and transient ischaemic attack in over 16s: diagnosis and initial management | Guidance | NICE · NHS: Transient ischaemic attack
14.Which symptom pattern supports a cerebrovascular event?
TIA and stroke commonly produce sudden focal neurological deficits, such as weakness affecting one side, facial asymmetry or difficulty speaking. Sudden visual loss can also occur. The localisation and abrupt onset distinguish these episodes from many nonspecific complaints, although symptoms alone cannot reliably distinguish TIA from completed stroke at presentation. The appropriate action is emergency assessment of a new suspected stroke-like episode rather than waiting to see whether it resolves.
Apply it
During breakfast, a patient abruptly develops facial droop and cannot lift one arm. There is no need to wait for a duration threshold or additional symptoms before arranging emergency assessment for a possible cerebrovascular event.
Common pitfall: Waiting to determine whether an episode will become a TIA delays stroke care. Duration is not a safe reason to postpone assessment of active focal deficits.
15.How does prevention after a TIA depend on the underlying cause?
TIA assessment seeks both confirmation of the likely event and causes that can be treated to reduce stroke risk. Prevention can involve blood pressure treatment, cholesterol reduction, antiplatelet treatment or anticoagulation when an appropriate cardiac cause is identified. Some patients need assessment of carotid artery disease. The principle is to match prevention to the mechanism and overall vascular risk rather than assuming every transient neurological episode receives an identical long-term drug plan.
Apply it
After a confirmed TIA, one patient is found to have atrial fibrillation while another has significant carotid disease. Explain why further assessment changes prevention choices even though both patients experienced brief unilateral weakness that fully resolved.
Common pitfall: Treating antiplatelets and anticoagulants as interchangeable obscures their different indications. A recognised TIA should trigger cause-focused prevention as well as attention to lifestyle risks.
16.What makes a thunderclap headache an emergency?
Subarachnoid haemorrhage is bleeding into the space around the brain and can present with an abrupt, extremely severe headache. The speed of onset is a key clue: the pain arrives suddenly rather than gradually building through a familiar pattern. Neck stiffness, vomiting, light sensitivity, reduced consciousness or focal neurological symptoms may accompany it. A sudden severe headache warrants emergency assessment even when the patient remains alert and initially has no obvious neurological deficit.
Apply it
A patient describes an explosive headache that became maximal almost immediately while exercising. Although she is alert and can move all limbs normally, the onset pattern requires emergency assessment for subarachnoid haemorrhage or another serious cause.
Common pitfall: A normal limb examination does not make a thunderclap headache benign. Focusing only on pain severity misses the discriminating importance of sudden onset.
17.How does CT timing determine further investigation for suspected subarachnoid haemorrhage?
Use urgent non-contrast CT of the head as the initial investigation. If a negative scan was performed within six hours of symptom onset and reported and documented by an appropriately experienced radiologist, lumbar puncture is not routinely required; consider alternative diagnoses and seek specialist advice. A negative CT performed beyond six hours is less reliable, so consider lumbar puncture. When indicated, allow at least 12 hours from symptom onset before lumbar puncture so that cerebrospinal fluid bilirubin can be detected reliably.
Apply it
A patient has a negative non-contrast CT ten hours after a thunderclap headache. Consider lumbar puncture once at least 12 hours have elapsed from onset. A negative scan at three hours, appropriately reported and documented, would instead generally avoid routine lumbar puncture while alternative diagnoses and specialist advice are considered.
Common pitfall: Neither every negative CT nor every thunderclap headache mandates the same next test. Record onset and scan times; performing lumbar puncture too early can undermine bilirubin detection.
Rationale and impact | Subarachnoid haemorrhage caused by a ruptured aneurysm: diagnosis and management | Guidance | NICE · NHS: Subarachnoid haemorrhage
18.Why may an aneurysm need coiling or clipping after haemorrhage?
An aneurysm is a weakened, bulging area of an artery that can rupture and cause subarachnoid haemorrhage. Endovascular coiling and surgical clipping are ways to secure an aneurysm and reduce the risk of further bleeding. They address the bleeding source rather than simply relieving headache. Choice depends on the aneurysm and the patient's circumstances, while hospital care also addresses complications and recovery needs arising from the original haemorrhage.
Apply it
A patient recovering from aneurysmal subarachnoid haemorrhage asks why an intervention is proposed when the headache is improving. Explain that securing the aneurysm aims to reduce further bleeding rather than functioning as an analgesic treatment.
Common pitfall: Symptom improvement does not mean the aneurysm has become safe. Confusing headache relief with control of the bleeding source can distort the treatment discussion.
Musculoskeletalnot stated
19.When should an acutely swollen joint suggest septic arthritis?
Septic arthritis is infection within a joint and can develop rapidly, causing severe pain, swelling and difficulty moving the affected joint. Fever, shivering or general illness strengthens concern, but the joint presentation itself can be striking. Prompt hospital assessment matters because infection can damage the joint and affect the whole patient. The discriminating decision is to consider infection before treating an acutely hot painful joint as a routine inflammatory flare.
Apply it
A patient develops a very painful swollen knee over one day and feels feverish. Movement is markedly limited. Arrange urgent assessment for septic arthritis instead of assuming a mechanical strain explains the sudden loss of function.
Common pitfall: A previous diagnosis of arthritis does not protect against joint infection. New systemic illness or an unusually severe acute monoarthritis should change the assessment.
20.Why can septic arthritis require both antibiotics and joint drainage?
Septic arthritis treatment addresses infection and the infected fluid within the joint. Hospital care commonly includes antibiotics given into a vein and drainage of joint fluid, sometimes repeatedly. Antibiotics target the organism, while drainage removes infected material and helps manage the affected joint. The important distinction is that this is an urgent infection treatment pathway, not simply a need for stronger analgesia or a long-term anti-inflammatory treatment adjustment.
Apply it
A patient admitted with septic arthritis asks why the team plans drainage as well as intravenous antibiotics. Explain that both the infection and the infected joint contents need treatment to protect the joint and support recovery.
Common pitfall: Pain relief alone does not control the infection. Delaying definitive assessment while trying successive analgesics risks worsening joint damage and systemic illness.
21.What distinguishes an acute gout flare from long-term urate control?
Gout is a crystal arthritis associated with urate crystals forming in and around joints. An acute flare causes sudden severe pain, heat and swelling, often affecting the big toe. Anti-inflammatory treatment addresses the painful flare, whereas urate-lowering treatment reduces the underlying tendency to form crystals over time. These are different therapeutic goals. An acute hot joint still needs assessment for infection when systemic symptoms or other concerning features are present.
Apply it
A patient with repeated big-toe flares asks why a preventive medicine is being discussed when anti-inflammatory tablets relieve attacks. Explain that flare relief treats current inflammation, while sustained urate reduction aims to prevent future crystal-related episodes.
Common pitfall: A classic location supports gout but does not automatically exclude infection. Preventive urate-lowering therapy should not be described as an immediate painkiller for the current flare.
22.Why does recurrent gout need a prevention discussion?
Repeated gout attacks indicate an ongoing tendency to urate crystal deposition, not just isolated episodes of pain. Long-term urate-lowering treatment can reduce attacks and complications by lowering uric acid levels. Lifestyle measures, including hydration and addressing excess alcohol or weight where relevant, support management but may not be sufficient alone. The decision is to discuss sustained prevention and adherence rather than repeatedly treating flares without considering the continuing disease process.
Apply it
A patient has had several gout attacks and stops preventive tablets whenever pain disappears. Discuss the continuing role of urate control between flares and explore the practical reasons for stopping, rather than simply issuing another acute prescription.
Common pitfall: An asymptomatic interval does not prove crystal-related risk has disappeared. Stopping preventive treatment whenever pain resolves confuses disease control with the absence of a flare.
23.Which joint pattern supports rheumatoid arthritis?
Rheumatoid arthritis is an inflammatory condition that commonly causes painful, swollen and stiff joints, often involving small joints of the hands or feet. A symmetrical pattern and prolonged stiffness after waking or inactivity support inflammatory disease. Symptoms can fluctuate and may include fatigue. The useful discrimination is between persistent inflammatory features and brief stiffness associated with mechanical use; early recognition allows assessment before ongoing inflammation causes further functional loss.
Apply it
A patient reports swollen knuckles in both hands, fatigue and morning stiffness lasting well into breakfast. This pattern supports inflammatory arthritis and warrants assessment rather than reassurance that all hand stiffness reflects age-related wear.
Common pitfall: Symmetry is a useful clue rather than an absolute requirement. Do not dismiss inflammatory arthritis solely because an early presentation is incomplete or uneven.
24.How do DMARDs change the treatment goal in rheumatoid arthritis?
Disease-modifying antirheumatic drugs reduce the inflammatory disease activity that can damage joints in rheumatoid arthritis. Their purpose extends beyond relieving pain during a bad day. Analgesics and anti-inflammatory medicines can improve symptoms but do not provide the same protection against disease progression. Early disease-modifying treatment and monitoring therefore matter even when symptoms are manageable. Patients need realistic expectations because benefit may take time and treatment requires follow-up for effectiveness and adverse effects.
Apply it
A patient with newly diagnosed rheumatoid arthritis asks to use only painkillers because they improve hand pain. Explain that symptom relief and prevention of joint damage are separate goals, supporting discussion of a monitored DMARD plan.
Common pitfall: Good analgesia can conceal ongoing inflammatory activity. Conversely, lack of immediate benefit from a DMARD does not by itself mean the treatment has failed.
Mental healthnot stated
25.Which changes suggest mania, and how urgently should it be assessed?
Suspected mania requires urgent specialist mental health assessment. Features include a sustained departure from usual mood and functioning, with elevated or irritable mood, increased energy, reduced need for sleep, rapid speech, racing thoughts and impulsive behaviour. Explore episode duration, functional impairment, psychosis and immediate risks, including harmful spending, exploitation, self-neglect and danger to self or others. Review substances, medicines and possible medical contributors such as thyroid disease. Reduced sleep need means little sleep without expected tiredness; insomnia alone does not establish mania.
Apply it
A usually cautious person sleeps two hours nightly without fatigue, speaks continuously and spends savings on unrealistic business plans. Arrange urgent specialist assessment for suspected mania, assess immediate financial and personal risks, and establish duration and possible substance or medical contributors.
Common pitfall: Do not delay referral while waiting for every diagnostic detail when mania is suspected. Ordinary enthusiasm or insomnia should not be equated with a sustained episode involving impaired judgement and functioning.
Recommendations | Bipolar disorder: assessment and management | Guidance | NICE · NHS: Bipolar disorder
26.Why does a history of mood elevation matter in depression assessment?
Bipolar I disorder requires a manic episode; depressive episodes commonly occur but are not required. Bipolar II disorder involves hypomanic and major depressive episodes without a manic episode. See the [NIMH explanation of bipolar subtypes](https://www.nimh.nih.gov/health/publications/bipolar-disorder). A patient presenting during depression may not volunteer previous periods of unusually high energy, reduced sleep or impulsive behaviour, especially if those periods felt positive. Assessing the longitudinal pattern, duration, impairment and consequences helps distinguish bipolar illness from a history confined to depressive episodes and guides treatment and relapse prevention.
Apply it
A patient seeks help for depression but recalls earlier periods of markedly reduced sleep, unusual confidence and disruptive spending. Explore those episodes and their consequences before treating the current presentation as an isolated depressive illness. Establish whether the earlier episode was hypomanic or manic, because a manic episode changes the subtype assessment.
Common pitfall: Depression is not necessary for bipolar I disorder. Equally, brief happiness or a single energetic day does not establish hypomania; assess the episode's duration, associated changes, functional consequences and possible substance or medical causes.
NHS: Bipolar disorder · Recommendations | Bipolar disorder: assessment and management | Guidance | NICE
27.How can relapse planning help someone with bipolar disorder?
Relapse prevention combines an agreed treatment plan with recognition of early changes that have preceded previous episodes. Changes in sleep, energy, mood or behaviour can provide a useful individual warning pattern. Regular routines, treatment adherence and timely contact with the care team can help reduce disruption. The practical aim is to agree actions while the person is well, rather than expecting a severely elevated or depressed patient to construct a plan during a crisis.
Apply it
A patient recognises that previous manic episodes began with several nights of reduced sleep and increased spending. Develop an agreed response with the care team and, with permission, trusted supporters who can notice the same pattern.
Common pitfall: Relapse plans should reflect the person's own history. A generic instruction to seek help when unwell may be too vague to guide early action.
28.What should a self-harm assessment explore beyond the injury?
Assessment after self-harm should address physical treatment needs and the psychological and social circumstances surrounding the episode. Relevant issues include what happened, current distress, thoughts of suicide, previous episodes, support and difficulties at home or elsewhere. The person's account helps explain the function and context of the behaviour. A compassionate psychosocial assessment informs a useful care plan; wound severity alone cannot establish the person's needs or future safety.
Apply it
A patient with superficial cuts says an argument triggered the episode and describes feeling trapped at home. Treat the injuries and explore current safety, emotional distress and social circumstances rather than ending care because the wounds are minor.
Common pitfall: Judging need from injury depth or assuming attention-seeking can silence disclosure. Limited physical damage does not establish low distress or remove the need for assessment.
29.How does a collaborative safety plan support care after self-harm?
A safety plan identifies personal warning signs, coping strategies, supportive people and places, professional contacts and emergency help routes. Collaboratively identify and restrict access to lethal means where feasible. Agree practical actions that the person can use when distress rises and make the plan accessible to them. These components are specified in [NICE NG225, recommendations 1.11.7–1.11.8](https://www.nice.org.uk/guidance/ng225/chapter/Recommendations). The plan supports ongoing assessment, treatment and follow-up; it is more useful than a promise that self-harm will never recur.
Apply it
A patient says distress escalates late at night when alone. Agree warning signs, a realistic coping activity, an available support contact and an overnight emergency route. Discuss how access to potentially lethal medicines or other means can be reduced collaboratively.
Common pitfall: A written promise to remain safe does not replace assessment or care. A useful plan must fit the person's circumstances, be available during a crisis and include support that can actually be reached.
30.When does self-harm require emergency physical care as well as psychological support?
Self-harm can involve injuries or poisoning that require emergency medical treatment, even when the person is calm or describes limited suicidal intent. The method, amount, timing and current physical state help determine immediate treatment needs. Psychological assessment remains important, but it must not delay treatment of serious physical harm. Conversely, successful physical treatment does not resolve the distress or circumstances that contributed to the episode, so both aspects of care matter.
Apply it
A patient reports taking a potentially harmful quantity of tablets but appears physically comfortable and regrets the act. Arrange urgent medical assessment of the ingestion while ensuring psychological needs and current safety are also addressed.
Common pitfall: Regret, calm behaviour or initially absent symptoms cannot establish that poisoning is harmless. Intent and physical toxicity are related assessment questions but are not interchangeable.
Gastrointestinalnot stated
31.How does coeliac disease cause symptoms beyond diarrhoea?
Coeliac disease is an autoimmune condition in which gluten exposure damages the small intestine. Impaired nutrient absorption can produce fatigue, weight loss and nutritional deficiencies as well as abdominal symptoms. Some patients have few obvious digestive complaints, so unexplained deficiency or persistent fatigue can be relevant clues. The reasoning principle is to consider an intestinal cause for systemic problems rather than requiring diarrhoea as an essential feature of the disease.
Apply it
A patient has persistent fatigue and a nutritional deficiency but only mild intermittent bloating. Coeliac disease remains a plausible explanation, so the absence of prominent diarrhoea should not prevent an appropriate diagnostic discussion and testing plan.
Common pitfall: Equating coeliac disease with severe diarrhoea misses less obvious presentations. Symptom severity does not reliably describe the degree of nutritional impact in an individual patient.
32.Which initial coeliac tests are needed, and why must gluten exposure and IgA status be considered?
Request total IgA and IgA tissue transglutaminase antibodies as initial tests. In young people and adults, weakly positive IgA tTG is followed by IgA endomysial antibodies. IgA deficiency can produce falsely negative IgA-based serology; consider IgG EMA, IgG deamidated gliadin peptide or IgG tTG instead. Tests are reliable only during adequate gluten exposure: NICE advises gluten in more than one meal daily for at least six weeks before testing in people eating a normal diet. Continue gluten during investigation until specialist confirmation. Refer for specialist assessment if clinical suspicion persists despite negative serology.
Apply it
A patient with persistent diarrhoea and iron deficiency has negative IgA tTG but total IgA below 0.07 g/L despite continuing gluten. The negative IgA result does not exclude coeliac disease: use an appropriate IgG-based test and arrange specialist assessment if suspicion remains. If gluten was already excluded and cannot be reintroduced, seek gastrointestinal specialist assessment rather than accepting negative serology as conclusive.
Common pitfall: Checking IgA tTG alone misses an important reason for false-negative results. Symptom improvement after avoiding gluten does not establish the diagnosis, and starting a gluten-free diet before investigation can make both serology and intestinal assessment less reliable.
Recommendations | Coeliac disease: recognition, assessment and management | Guidance | NICE · NHS: Coeliac disease — diagnosis
33.How does confirmed coeliac disease change long-term care?
A gluten-free diet is the central treatment for confirmed coeliac disease because removing the trigger allows intestinal recovery and reduces continuing injury. Management also considers nutritional deficiencies and complications, rather than using symptom improvement as the only marker of success. Dietetic support helps patients identify gluten sources and maintain a balanced diet. The key decision is to treat the autoimmune intestinal disease consistently, including when accidental exposure produces only mild symptoms.
Apply it
After diagnosis, a patient avoids obvious bread and pasta but remains unsure about packaged foods and nutritional balance. Arrange dietetic support and review nutritional needs rather than judging treatment success only by reduced abdominal discomfort.
Common pitfall: A gluten-free diet can still be nutritionally unbalanced. Absence of pain after occasional gluten exposure does not show that the exposure is harmless to the intestine.
34.Which causes should be considered in peptic ulcer disease?
Helicobacter pylori infection and non-steroidal anti-inflammatory medicines are important causes of stomach ulcers. Both can undermine the protection of the stomach lining, allowing injury. Assessment should therefore include a medication history, including non-prescription painkillers, and consideration of H pylori testing. Identifying the cause matters because reducing acid alone may improve symptoms without removing an ongoing trigger such as infection or continued exposure to an ulcerogenic medicine.
Apply it
A patient with recurrent upper abdominal pain takes ibuprofen most days and has never been assessed for H pylori. Review the medicine exposure and investigate the underlying cause rather than repeatedly treating symptoms without reassessment.
Common pitfall: Assuming stress or spicy food explains an ulcer can distract from treatable causes. Ask specifically about over-the-counter NSAIDs rather than relying on the prescription list.
35.Which symptoms suggest gastrointestinal bleeding from an ulcer?
An ulcer can bleed, producing vomited blood or material resembling coffee grounds, or black sticky stools. These are emergency warning signs. Suspected gastrointestinal bleeding with faintness requires immediate emergency hospital assessment; arrange emergency transport when circulatory compromise is suspected. Assess circulation and begin appropriate emergency care while arranging transfer. The amount of abdominal pain does not reliably measure bleeding severity, and an urgent outpatient appointment is insufficient for a patient with melaena and presyncope.
Apply it
A patient taking regular NSAIDs develops black sticky stools and feels faint on standing. Arrange immediate emergency hospital assessment for suspected gastrointestinal bleeding. If faintness, hypotension, tachycardia or collapse suggests circulatory compromise, use emergency ambulance transport rather than asking the patient to travel independently.
Common pitfall: Mild abdominal pain or modest visible blood loss does not exclude a serious bleed. Do not substitute antacid treatment, a routine blood test or an outpatient endoscopy referral for immediate emergency assessment in this presentation.
36.Why does H pylori-associated ulcer disease need cause-directed treatment?
When H pylori causes an ulcer, treatment usually combines antibiotics to eradicate the infection with acid suppression to support healing. Acid suppression and bacterial eradication have different purposes. If an NSAID contributes, the treatment plan also needs to address that exposure and its indication. The transferable principle is that symptom improvement does not prove the cause has been removed; management should address the identified mechanism and include the recommended follow-up.
Apply it
A patient with a confirmed H pylori-associated ulcer asks to take only the acid-suppressing medicine because pain has improved. Explain that antibiotics target the infection responsible for the ulcer and should be taken as prescribed.
Common pitfall: Stopping cause-directed treatment when discomfort settles can leave the underlying problem untreated. Do not assume every ulcer needs antibiotics without evidence of an appropriate indication.
Endocrine metabolic, and clinical haematologynot stated
37.How does insulin deficiency produce DKA, and what biochemical criteria establish it in adults?
Insulin deficiency promotes fat breakdown and ketone production, causing metabolic acidosis; hyperglycaemia also causes urinary fluid loss. The [JBDS adult DKA guideline](https://abcd.care/sites/default/files/site_uploads/JBDS_Guidelines_Current/JBDS_02_DKA_Guideline_with_QR_code_March_2023.pdf) requires 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. Ketones alone do not establish DKA because ketosis can occur without metabolic acidosis.
Apply it
A patient with known diabetes has glucose 14 mmol/L, blood ketones 4.2 mmol/L and venous pH 7.24: all three components are present. Another patient has raised ketones but pH 7.38 and bicarbonate 22 mmol/L; those results do not establish DKA, although the cause and risk of progression still require assessment.
Common pitfall: Do not diagnose DKA from hyperglycaemia or ketones alone. Known diabetes satisfies the diabetes component even when the current glucose is not above 11 mmol/L, so a lower glucose must not exclude DKA when ketosis and acidosis are present.
38.Which symptoms make DKA an emergency concern?
DKA can cause thirst, frequent urination, abdominal pain, nausea or vomiting, deep breathing, fruity-smelling breath, drowsiness or confusion. Symptoms may occur before diabetes has been diagnosed. A compatible pattern, especially with raised ketones, requires emergency assessment because deterioration can be rapid. The discriminating step is to connect gastrointestinal or breathing symptoms with insulin deficiency rather than assuming gastroenteritis or a respiratory illness explains the entire presentation.
Apply it
A young adult with no diabetes diagnosis develops marked thirst, weight loss, vomiting and deep breathing. Arrange emergency assessment for possible DKA rather than waiting for a routine appointment to investigate the preceding weight loss.
Common pitfall: An established diabetes diagnosis is not required for DKA to occur. Vomiting and abdominal pain can be consequences of metabolic illness rather than proof of gastrointestinal disease.
39.Why does DKA treatment require potassium monitoring, and how is resolution assessed?
Total-body potassium is depleted in DKA through urinary and other losses even when the presenting serum potassium is normal or high. Insulin deficiency and acidosis shift potassium out of cells; insulin treatment shifts it back into cells and can rapidly lower serum potassium. Use repeated electrolyte measurements and monitored potassium replacement according to the treatment protocol. The main resolution criteria in the [JBDS adult DKA guideline](https://abcd.care/sites/default/files/site_uploads/JBDS_Guidelines_Current/JBDS_02_DKA_Guideline_with_QR_code_March_2023.pdf) are blood ketones below 0.6 mmol/L and venous pH above 7.3.
Apply it
A patient's glucose falls during intravenous fluids and insulin, but ketones remain 1.8 mmol/L. DKA has not resolved. A falling potassium concentration requires prompt protocol-guided reassessment and replacement, even if the initial potassium concentration was high.
Common pitfall: Normal or high serum potassium does not imply adequate potassium stores. Do not stop DKA treatment solely because glucose normalises; ketone clearance and correction of acidosis remain necessary.
40.How should illness change self-management in insulin-treated diabetes?
Illness can increase insulin requirements even when appetite falls. Insulin deficiency allows ketones to accumulate and can precipitate diabetic ketoacidosis (DKA). Continue insulin, monitor glucose and ketones more closely, maintain fluid intake and follow the individual sick-day plan for dose adjustments. Blood ketones of 0.6–1.5 mmol/L require repeat testing after two hours, with immediate diabetes-team or NHS 111 advice if the person feels unwell. At 1.6–3 mmol/L, seek immediate diabetes-team or NHS 111 advice even without symptoms. Above 3 mmol/L, seek emergency assessment at A&E or call 999. Symptoms suggesting DKA with an unknown ketone level also require emergency assessment.
Apply it
A person with type 1 diabetes omits insulin during a vomiting illness. Check glucose and blood ketones promptly. A reading of 1.2 mmol/L with feeling unwell warrants immediate advice and repeat ketone testing after two hours; 2.2 mmol/L warrants immediate advice even if symptoms settle. A reading of 3.4 mmol/L requires emergency assessment. Vomiting with abdominal pain and deep breathing warrants emergency assessment when ketones cannot be checked; obtaining a measurement must not delay help.
Common pitfall: Using 'no food, no insulin' as a rule can precipitate DKA. Reduced food intake may require individual dose adjustments, but does not remove the need for insulin. The two-hour repeat-testing instruction for mildly raised ketones must not delay immediate advice when unwell or emergency assessment when DKA symptoms are present and ketones are unknown.
41.Which findings favour vitamin B12 deficiency over isolated folate deficiency?
Vitamin B12 and folate deficiencies can both impair normal red blood cell development and cause anaemia with fatigue or breathlessness. Vitamin B12 deficiency can additionally cause neurological problems, including pins and needles, numbness, impaired balance or cognitive changes. These features make B12 deficiency particularly important to consider, even when anaemia is not prominent. The discriminating principle is to assess neurological symptoms alongside blood findings rather than treating all nutritional anaemia as equivalent.
Apply it
A patient with fatigue also reports tingling feet and increasing unsteadiness. Consider vitamin B12 deficiency and investigate promptly rather than attributing every symptom to anaemia or assuming folate deficiency provides an equally complete explanation.
Common pitfall: Absence of obvious anaemia does not exclude neurological B12 deficiency. A normal-looking clinical appearance should not override a compatible sensory or balance history.
42.How can intrinsic factor failure cause vitamin B12 deficiency?
Vitamin B12 absorption depends on processes involving the stomach and small intestine, including binding to intrinsic factor. In pernicious anaemia, an autoimmune process disrupts the stomach's ability to support this pathway, so adequate dietary intake may not prevent deficiency. Dietary deficiency, intestinal disease and other causes also need consideration. Identifying the mechanism matters because increasing B12-rich foods alone may be insufficient when absorption is impaired or the cause is persistent.
Apply it
A patient who regularly eats animal products has confirmed B12 deficiency and a cause consistent with pernicious anaemia. Explain that sufficient intake does not guarantee absorption and that treatment must address the continuing absorption problem.
Common pitfall: Assuming every B12 deficiency proves a poor diet overlooks malabsorption. Dietary advice alone may fail when the physiological pathway needed for absorption is impaired.
Child and adolescent healthnot stated
43.Why is uncomplicated bronchiolitis usually managed supportively?
Bronchiolitis is usually a viral infection affecting the small airways of babies and young children. Cold-like symptoms may progress to cough, faster breathing, wheeze and feeding difficulty. Treatment is mainly supportive because antibiotics do not treat the usual viral cause. The practical decision is to assess breathing, feeding and hydration, then determine whether home care is appropriate or hospital support is needed, rather than assuming noisy breathing automatically requires antibiotics.
Apply it
A baby has a runny nose followed by cough and mild wheeze but remains alert, feeds reasonably and has no marked breathing difficulty. Supportive care and clear safety advice are more appropriate than routine antibiotics.
Common pitfall: A viral diagnosis does not mean every case is mild. The decision about place of care depends on breathing, feeding, hydration and the child's condition.
44.Which bronchiolitis features require emergency escalation?
Severe breathing difficulty, pauses in breathing, blue or grey colour around the lips or tongue, or a baby who is floppy or difficult to wake require emergency help. These findings indicate potential respiratory compromise rather than a routine cough. Increased work of breathing may include grunting and marked recession. The central judgement is to identify physiological danger signs promptly, without waiting for every typical bronchiolitis symptom or for a planned review.
Apply it
A parent reports that a coughing infant has had breathing pauses and now looks blue around the lips. Arrange emergency help immediately rather than offering another feeding strategy or waiting to see whether the cough settles.
Common pitfall: A familiar viral illness label must not override new danger signs. Apnoea or altered responsiveness requires escalation even if the child seemed well earlier.
45.How do feeding, breathing rate and oxygen saturation guide bronchiolitis referral?
Consider hospital referral for intake around 50–75% of usual, clinical dehydration, respiratory rate above 60/minute or persistent room-air oxygen saturation below 92%. Clinical judgement incorporates age under three months, prematurity, underlying disease and the family's ability to manage at home. Emergency referral is required for apnoea, central cyanosis, serious illness or severe distress, such as grunting, marked recession or respiratory rate above 70/minute. Hospital oxygen-saturation admission thresholds differ: persistently below 90% from six weeks of age, or below 92% under six weeks or with underlying health conditions.
Apply it
A four-month-old with bronchiolitis takes 60% of usual feeds, has fewer wet nappies and breathes at 64/minute. Consider hospital referral even with saturation of 94%. Apnoea or central cyanosis would require emergency transfer. Saturation alone is not the only admission consideration; feeding and respiratory distress also matter.
Common pitfall: Do not use the lower hospital oxygen threshold to dismiss referral needs in primary care. Check measurement quality and interpret borderline saturation with the whole clinical picture and risk factors.
Recommendations | Bronchiolitis in children: diagnosis and management | Guidance | NICE · NHS: Bronchiolitis
46.Why must suspected meningitis be assessed before a rash appears?
Meningitis symptoms can appear in any order, and some may never appear. Fever, headache, neck stiffness, vomiting, light sensitivity, drowsiness or seizures can be relevant, but a rash is not required. A non-blanching rash is a serious warning sign when present; its absence cannot provide reassurance in an otherwise concerning presentation. The decision is to seek emergency assessment on clinical suspicion rather than waiting for a complete textbook pattern.
Apply it
A child has fever, severe headache, neck discomfort and increasing drowsiness but no rash. Arrange emergency assessment for possible meningitis rather than advising the family to return only if skin changes develop later.
Common pitfall: A negative glass test does not exclude meningitis. The test addresses a rash that is present and cannot replace assessment of the child's overall condition.
47.How can meningitis present differently in an infant?
Babies with meningitis may show poor feeding, irritability, unusual or high-pitched crying, reduced responsiveness or a bulging soft spot. They may not display the headache or neck stiffness that an older child can describe. A marked change in behaviour or interaction in an unwell infant is a serious cue. Difficulty waking indicates reduced responsiveness and requires immediate emergency hospital assessment, rather than a routine or urgent outpatient review. Assessment must adapt to age without waiting for adult-style symptoms or a rash.
Apply it
A young infant feeds poorly, becomes unusually difficult to wake and has an abnormal high-pitched cry. Arrange immediate emergency hospital assessment for serious infection, including meningitis, using emergency ambulance transport. Reduced responsiveness makes observation for feeding improvement or a later appointment inappropriate.
Common pitfall: Requiring neck stiffness or a verbal headache history in an infant applies the wrong developmental framework. Altered responsiveness changes the escalation threshold even when poor feeding initially appeared to be the main problem.
48.How does vaccination reduce meningitis risk without excluding the diagnosis?
Vaccination protects against several infections that can cause meningitis, making routine immunisation an important preventive measure. However, meningitis has multiple possible causes, and no single vaccine prevents every case. A vaccinated child with concerning symptoms still needs appropriate urgent assessment. The principle is to distinguish risk reduction at population and individual levels from complete exclusion of disease in a symptomatic patient, while maintaining the value of preventive immunisation.
Apply it
A parent believes meningitis is impossible because the child is fully vaccinated. Explain that vaccination reduces important risks but does not cover every cause, so current fever, drowsiness and neck discomfort still require emergency assessment.
Common pitfall: Avoid both extremes: vaccination is neither a universal rule-out test nor an ineffective precaution. Prevention history modifies risk but does not override serious symptoms.
Cardiorespiratorynot stated
49.How is an irregular pulse investigated for atrial fibrillation?
Atrial fibrillation causes irregular electrical activity in the upper chambers of the heart and an irregular heartbeat. Palpitations or an irregular pulse can suggest it, but an electrocardiogram is used to identify the rhythm. If episodes come and go, longer recording may be needed. The useful distinction is between recognising a possible arrhythmia and confirming its type; the description of palpitations alone does not establish atrial fibrillation or its treatment requirements.
Apply it
A patient reports intermittent fluttering and has an irregular pulse at review. Arrange an ECG to assess the rhythm rather than diagnosing anxiety solely from the symptom description or prescribing long-term rhythm treatment without confirmation.
Common pitfall: A normal recording between episodes may not capture an intermittent arrhythmia. Persistent episodic symptoms can require further monitoring rather than automatic dismissal after one normal ECG.
50.Which symptoms and complications make atrial fibrillation clinically important?
Atrial fibrillation can cause palpitations, breathlessness, tiredness, dizziness or reduced exercise tolerance, but some patients have no noticeable symptoms. Its importance extends beyond discomfort because it is associated with stroke and other cardiovascular complications. The clinical decision therefore considers rhythm, symptoms and longer-term risk rather than using how bothered the patient feels as the sole measure of severity. An incidental finding can still require a structured management discussion.
Apply it
An irregular rhythm is found during a routine review in a patient who feels well. Explain that absence of palpitations does not remove the need to confirm the rhythm and consider stroke prevention and other management goals.
Common pitfall: Equating symptom absence with absence of risk misses an important feature of AF. Treatment goals should include prevention as well as relief of palpitations or breathlessness.
51.How are stroke prevention and bleeding risk assessed separately from AF rate control?
Rate-control medicines slow the ventricular response; anticoagulants reduce clot-related stroke risk. CHA2DS2-VASc assigns one point each for heart failure, hypertension, diabetes, vascular disease, age 65–74 and female sex, and two each for age at least 75 and previous stroke/TIA/systemic embolism. NICE recommends offering anticoagulation at a score of at least 2 and considering it for men scoring 1, taking bleeding risk into account. ORBIT assigns one point each for age at least 75, eGFR below 60 mL/min/1.73 m² and antiplatelet treatment; two for bleeding history; and two for one combined anaemia component. The anaemia component qualifies with haemoglobin below 130 g/L in men or 120 g/L in women, haematocrit below 40% in men or 36% in women, or a history of anaemia, as defined in the [original ORBIT study](https://academic.oup.com/eurheartj/article/36/46/3258/2398371). Count this component only once, even when several indicators apply.
Apply it
A 68-year-old man with hypertension and no other stroke factors has CHA2DS2-VASc 2: one for age and one for hypertension, supporting an offer of anticoagulation. His haemoglobin is 125 g/L and haematocrit 39%, eGFR is 75 mL/min/1.73 m², and he has no bleeding history or antiplatelet treatment. ORBIT is 2 because haemoglobin and haematocrit both qualify for the same two-point component. Neither age nor renal function adds points in this example. Investigate the anaemia and discuss bleeding risk alongside stroke prevention.
Common pitfall: Use the sex-specific ORBIT cut-offs rather than assuming that any laboratory flag defines its anaemia component. A haemoglobin of 125 g/L qualifies in a man but does not, by itself, qualify in a woman. Normal current haemoglobin does not negate reduced haematocrit or a history of anaemia. A high bleeding score supports risk reduction, monitoring and shared decision-making; it is not an automatic threshold for withholding anticoagulation. Successful rate control does not remove an existing stroke-prevention indication.
Recommendations | Atrial fibrillation: diagnosis and management | Guidance | NICE · Update information | Atrial fibrillation: diagnosis and management | Guidance | NICE · NHS: Atrial fibrillation
52.Which presentation should raise concern for pulmonary embolism?
Pulmonary embolism occurs when a clot blocks a blood vessel in the lungs. Sudden breathlessness, chest pain that worsens with breathing and coughing up blood are important warning symptoms. The presentation may also include a fast heartbeat or collapse. These features require urgent assessment because symptoms alone cannot safely establish or exclude the diagnosis. Initial assessment must establish physiological stability: collapse or circulatory compromise requires emergency care, while a stable adult proceeds through probability-based diagnostic testing.
Apply it
A patient develops sudden breathlessness and sharp pain on inspiration after several days of calf swelling. Arrange urgent assessment for possible pulmonary embolism, assess vital signs and stability, and use the stable-adult diagnostic pathway if there is no haemodynamic compromise.
Common pitfall: Not every patient has all classic features. Absence of haemoptysis does not exclude PE, and a stable appearance does not establish that PE is absent.
53.How do leg symptoms and clinical probability guide investigation for pulmonary embolism in non-pregnant adults?
A deep vein thrombosis can form in a leg vein, and part of the clot can travel to the pulmonary circulation. This links unilateral leg pain or swelling with new breathlessness or pleuritic chest pain. In a haemodynamically stable, non-pregnant adult with suspected PE, use the two-level PE Wells score to estimate clinical probability. A score above 4 means PE likely: arrange immediate CTPA where suitable. A score of 4 or less means PE unlikely: obtain a D-dimer result within 4 hours if possible. A positive D-dimer leads to imaging; a negative result supports excluding PE within this pathway and considering alternative diagnoses. NICE NG158 does not cover pregnant women, so neither Wells/D-dimer branch should be extrapolated unchanged to pregnancy.
Apply it
A non-pregnant adult has unilateral leg swelling with pain on palpation of the deep veins, followed by breathlessness and pleuritic chest pain. Clinical DVT signs contribute 3 Wells points, and the assessment that an alternative diagnosis is less likely than PE contributes another 3. With no other scoring features, the total is 6. Arrange immediate CTPA if suitable; D-dimer is not the initial test in this PE-likely branch. If imaging cannot be performed immediately, offer interim therapeutic anticoagulation after assessing contraindications.
Common pitfall: Haemodynamic stability alone does not establish eligibility for the NG158 pathway. Suspected PE during pregnancy requires a pregnancy-specific diagnostic strategy and imaging assessment, as addressed by [RCOG Green-top Guideline 37b](https://www.rcog.org.uk/media/wj2lpco5/gtg-37b-1.pdf). Do not use the unchanged NG158 Wells/D-dimer algorithm to exclude PE in pregnancy. In eligible non-pregnant adults, absent leg symptoms does not exclude PE, a high Wells score does not confirm it, and a positive D-dimer requires further investigation rather than establishing the diagnosis.
NHS: Pulmonary embolism · Overview | Venous thromboembolic diseases: diagnosis, management and thrombophilia testing | Guidance | NICE · Recommendations | Venous thromboembolic diseases: diagnosis, management and thrombophilia testing | Guidance | NICE · visual-summary-pdf-11193380893
54.When should a haemodynamically stable, non-pregnant adult with suspected PE have D-dimer, imaging or interim anticoagulation?
The NICE NG158 pathway applies to non-pregnant adults aged 18 or over. A two-level PE Wells score of 4 or less leads to D-dimer testing, with the result available within four hours if possible. A positive result requires imaging; a negative result makes PE unlikely and prompts consideration of alternative diagnoses. A score above 4 leads directly to immediate CTPA where suitable. Assess suitability for V/Q imaging when contrast allergy, severe renal impairment or high irradiation risk makes CTPA unsuitable. Offer interim therapeutic anticoagulation, subject to contraindications and bleeding assessment, if indicated imaging cannot be performed immediately or the D-dimer result cannot be obtained within four hours. Anticoagulation limits further clot formation and extension; it does not instantly dissolve the embolus.
Apply it
A stable, non-pregnant adult with a Wells score of 3 enters the D-dimer branch. If the result will take six hours, offer interim therapeutic anticoagulation while awaiting it, after assessing contraindications. A positive result requires imaging. Another stable, non-pregnant adult scoring 6 proceeds directly to imaging without initial D-dimer testing. Stability determines neither clinical probability nor eligibility for applying this pathway during pregnancy.
Common pitfall: A positive D-dimer does not diagnose PE, and interim anticoagulation does not replace completing investigations. Pregnancy requires an appropriate pregnancy-specific diagnostic pathway: NG158 excludes pregnant women. RCOG guidance recommends prompt objective testing and LMWH while VTE is being excluded unless strongly contraindicated; it advises against D-dimer testing in pregnancy. Suspected PE with haemodynamic instability requires urgent emergency assessment.
NHS: Pulmonary embolism · Overview | Venous thromboembolic diseases: diagnosis, management and thrombophilia testing | Guidance | NICE · Recommendations | Venous thromboembolic diseases: diagnosis, management and thrombophilia testing | Guidance | NICE · visual-summary-pdf-11193380893 · gtg-37b-1.pdf
Ethics and othernot stated
55.Why must an adult's capacity be presumed rather than inferred from agreement?
Adults should be presumed to have capacity unless there is reason to assess it. Capacity concerns the ability to make the particular decision at the relevant time, not whether the clinician considers the outcome sensible. Disagreement, disability, mental illness or an unusual choice does not by itself establish incapacity. The practical decision is to support understanding and assess decision-making ability when indicated rather than treating agreement with the recommended plan as the test.
Apply it
A patient refuses a recommended operation and explains a personal reason for accepting greater risk. Explore understanding and decision-making ability rather than concluding that refusal itself proves the patient lacks capacity to make the decision.
Common pitfall: A diagnosis or an unpopular choice is not a capacity assessment. The same person may have capacity for one decision while needing assessment for another.
56.How is decision-specific capacity assessed under the Mental Capacity Act in England and Wales?
Under the Mental Capacity Act framework in England and Wales, a person lacks capacity for a particular decision at the relevant time only if an impairment or disturbance of mind or brain causes inability to decide. After all practicable support, assess whether the person can understand relevant information, retain it long enough, use or weigh it and communicate a decision by any means. Establish the causal connection between the impairment and the inability. Capacity can fluctuate, and UK jurisdictions have different legal frameworks. See the [Office of the Public Guardian guidance](https://www.gov.uk/government/publications/health-and-social-care-workers-mental-capacity-act-decisions/making-decisions-about-your-health-welfare-or-finances).
Apply it
In England, an acutely delirious patient cannot use or weigh information about a non-urgent procedure despite suitable explanation and support. Document how delirium causes this inability for this decision, and consider postponement until recovery rather than assigning permanent or global incapacity.
Common pitfall: Diagnosis alone is insufficient, and an unwise choice does not prove inability. Conversely, listing failed functional abilities without establishing their connection to an impairment or disturbance leaves the legal assessment incomplete.
57.What information makes consent a meaningful decision?
Meaningful consent depends on a dialogue about the proposed intervention, its potential benefits and harms, reasonable alternatives and the option of taking no action. Information should be tailored to what matters to the individual patient, including risks that could affect their particular priorities. The clinician should check understanding and allow questions. A signed form records part of the process but cannot replace the conversation or establish that the choice was adequately informed.
Apply it
A musician considering hand surgery is particularly concerned about fine finger movement. Discuss risks relevant to that priority alongside benefits and alternatives, rather than relying only on the standard form and the most common complications.
Common pitfall: Listing generic risks without exploring the person's priorities can miss information central to their decision. A signature alone does not demonstrate meaningful consent.
58.When should a capacitous refusal be respected?
A patient with capacity may refuse a recommended intervention, including one that could preserve life or prevent serious harm. The clinician should ensure the decision is informed and voluntary, explore concerns and offer reasonable alternatives without coercion. Relevant discussion and the resulting decision should be recorded. The key boundary is that concern about consequences justifies careful explanation and support, but does not itself authorise overriding a valid refusal.
Apply it
An adult understands the likely consequences of declining a recommended transfusion and consistently refuses for personal reasons. Confirm that the decision is informed and voluntary, discuss acceptable alternatives and document the plan while respecting the refusal.
Common pitfall: A family member's agreement cannot replace the decision of an adult with capacity. The seriousness of the risk does not automatically invalidate the patient's choice.
59.How can communication support improve decision-making?
Patients may need more time, accessible information, interpretation, communication aids or support from someone they trust to participate in decisions. These needs should be addressed before concluding that a person cannot decide. Clinicians should adapt explanations and check understanding without making assumptions from language, sensory impairment or literacy. The practical principle is to remove avoidable barriers so that the assessment reflects the patient's decision-making ability rather than an inaccessible consultation.
Apply it
A patient with hearing impairment appears not to follow a treatment discussion. Arrange effective communication support and revisit the explanation before assessing capacity, rather than treating the initial communication failure as evidence of impaired decision-making.
Common pitfall: Communication difficulty and incapacity are different issues. A supporter can assist understanding, but should not displace the voice of a patient able to decide.
GMC: The seven principles of decision making and consent · GMC: Decision making and consent
60.How should a doctor respond when care has caused harm?
Professional candour requires openness and honesty when something goes wrong with care and causes harm or distress. The patient should receive a timely explanation of what is known, an apology, information about likely consequences and an explanation of what will happen next. Uncertainty should be acknowledged rather than concealed or filled with speculation. The discussion and relevant actions should be documented, with updates as further facts become available.
Apply it
A medication error causes a patient harm, but the full sequence is still being investigated. Explain the known facts promptly, apologise, describe current treatment and the review process, and arrange updates rather than waiting for a final report.
Common pitfall: Waiting for complete certainty can delay necessary disclosure. An apology should not be replaced by blame-shifting, speculation or a vague statement that an unexpected event occurred.
GMC: Being open and honest with patients when things go wrong
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 current MLA content map to check breadth beyond these selected topics, including its presentations, conditions, professional capabilities, knowledge and practical skills.
- Practise emergency recognition across apparently reassuring details: resolved focal weakness, no meningitis rash, mild external pregnancy bleeding or initial comfort after self-poisoning.
- Separate immediate stabilisation, diagnostic confirmation, cause-directed treatment and long-term prevention in each clinical scenario.
- Compare paired mechanisms: gout flare relief versus urate lowering; AF symptom control versus anticoagulation; ulcer acid suppression versus H pylori eradication.
- Make pregnancy, the postpartum period, infancy, hydration, medicines and communication needs explicit parts of clinical reasoning.
- Apply consent, capacity and candour as practical clinical decisions, with attention to individual priorities, uncertainty and documentation.
- Use balanced coverage across the ten feedback areas without treating this guide's allocation or candidate feedback percentages as official blueprint weights.
A practical preparation plan
1. Establish the applicable scope
Review the current GMC MLA content map and its applicability date. Build a study checklist across all six interconnected map domains, using the ten PLAB 1 feedback areas to organise revision rather than to restrict the syllabus.
2. Learn each decision through a contrast
For every concept, identify the mechanism, decisive cue, safest action and nearest plausible alternative. Explain why the alternative becomes less appropriate when a particular finding appears, such as collapse, focal weakness, reduced feeding or impaired communication.
3. Attempt the questions before reading explanations
Answer the independent drills and justify the chosen option in one sentence. Then use each explanation to check the reasoning for every option. Record whether an error concerned recognition, mechanism, urgency, treatment purpose or professional judgement.
4. Apply thresholds and timelines
Practise calculating changes from baseline, interpreting biochemical criteria and using symptom-onset times to select investigations. Build short cases around AKI detection, TIA treatment, negative CT findings, DKA resolution and bronchiolitis referral.
5. Revisit errors through active recall
Use the flashcards without looking at their answers, then create a changed mini-case for missed concepts. Alter one decisive feature, such as pregnancy status, symptom resolution, current ketones or decision-making ability, and explain how the action changes.
6. Extend breadth and integrate professional standards
Return to unstudied areas of the official map after mastering this selection. During clinical revision, add questions about informed choice, capacity support, disclosure and uncertainty so that professional reasoning is practised alongside diagnosis and management.
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: What is the PLAB 1 exam?
- GMC: What resources should you use to prepare for PLAB 1?
- GMC: PLAB and the MLA
- GMC: MLA content map
- GMC: MLA content map, September 2026 update
- GMC: About the MLA content map
- GMC: Your results
- NHS: Ectopic pregnancy
- NHS: Pre-eclampsia
- NHS: Acute kidney injury
- NHS: Kidney stones
- NHS: Transient ischaemic attack
- NHS: Subarachnoid haemorrhage
- NHS: Septic arthritis
- NHS: Gout
- NHS: Rheumatoid arthritis — symptoms
- NHS: Rheumatoid arthritis — treatment
- NHS: Bipolar disorder
- NHS: Self-harm — assessment and treatments
- NHS: Coeliac disease — diagnosis
- NHS: Coeliac disease
- NHS: Stomach ulcer
- NHS: Diabetic ketoacidosis
- NHS: Vitamin B12 or folate deficiency anaemia — symptoms
- NHS: Vitamin B12 or folate deficiency anaemia — causes
- NHS: Bronchiolitis
- NHS: Meningitis
- NHS: Atrial fibrillation
- NHS: Pulmonary embolism
- GMC: The seven principles of decision making and consent
- GMC: Decision making and consent
- GMC: Being open and honest with patients when things go wrong
- Recommendations | Hypertension in pregnancy: diagnosis and management | Guidance | NICE
- Recommendations | Acute kidney injury: prevention, detection and management | Guidance | NICE
- Recommendations | Stroke and transient ischaemic attack in over 16s: diagnosis and initial management | Guidance | NICE
- Rationale and impact | Subarachnoid haemorrhage caused by a ruptured aneurysm: diagnosis and management | Guidance | NICE
- Recommendations | Bipolar disorder: assessment and management | Guidance | NICE
- Recommendations | Bronchiolitis in children: diagnosis and management | Guidance | NICE
- Recommendations | Renal and ureteric stones: assessment and management | Guidance | NICE
- Recommendations | Self-harm: assessment, management and preventing recurrence | Guidance | NICE
- selfharm-assessment-management-and-preventing-recurrence-pdf-66143837346757
- Recommendations | Atrial fibrillation: diagnosis and management | Guidance | NICE
- Update information | Atrial fibrillation: diagnosis and management | Guidance | NICE
- Recommendations | Coeliac disease: recognition, assessment and management | Guidance | NICE
- Overview | Venous thromboembolic diseases: diagnosis, management and thrombophilia testing | Guidance | NICE
- Recommendations | Venous thromboembolic diseases: diagnosis, management and thrombophilia testing | Guidance | NICE
- visual-summary-pdf-11193380893
- Recommendations | Vitamin B12 deficiency in over 16s: diagnosis and management | Guidance | NICE
- JBDS_02_DKA_Guideline_with_QR_code_March_2023.pdf
- Bipolar Disorder - National Institute of Mental Health (NIMH)
- gtg-37b-1.pdf
- Making decisions: a guide for people who work in health and social care - GOV.UK
- venous-thromboembolic-diseases-diagnosis-management-and-thrombophilia-testing-pdf-66141847001797
- JBDS 02 The Management of Diabetic Ketoacidosis in Adults | The Association of British Clinical Diabetologists
- The ORBIT bleeding score: a simple bedside score to assess bleeding risk in atrial fibrillation - PMC
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