Medical Licensing (MD/DO) · Independent exam preparation

MRCP(UK): Clinical Reasoning, Interpretation and PACES Preparation Study Guide

Develop diagnostic reasoning, test interpretation and safe management through 60 selected concepts, 20 practice questions and 20 flashcards.

By CertMedbry · Updated 25 October 2026

60 concepts explainedWorked examples & common pitfallsOfficial blueprint references

Practise distinguishing similar presentations, interpreting investigations and recognising decisions requiring urgent action. This selective guide develops 60 clinical learning objectives across the listed domains. The official Part 1 and Part 2 outlines and PACES skill descriptors define the full scope; use them to identify additional subjects requiring study.

Try 20 free practice questions

What is the exam format?

Check the question types, timing and outline before planning your revision.

Which qualification and colleges does this guide cover?

The Membership of the Royal Colleges of Physicians of the United Kingdom, MRCP(UK), is the common general medicine membership diploma of the Royal College of Physicians, Royal College of Physicians of Edinburgh, and Royal College of Physicians and Surgeons of Glasgow. The Federation administers the examination. It is a postgraduate membership diploma rather than a primary medical degree or standalone medical licence.

MRCP(UK) examination — Royal College of Physicians · About the colleges — The Federation

Which examination components are required?

The diploma requires Part 1, Part 2 Written and Part 2 Clinical, known as PACES. These are separately assessed components of the shared MRCP(UK) examination.

MRCP(UK) examination — Royal College of Physicians · Regulations for MRCP(UK) Examination Candidates — version 2.2

How do the written examinations differ from these practice questions?

The official written examinations use best-of-five questions. Part 1 emphasises clinical sciences and general medicine. Part 2 Written applies that knowledge to diagnosis, investigation, immediate and longer-term management, and prognosis; it comprises two three-hour papers of 100 questions each. This guide's four-option questions are independent learning exercises.

Part 1 — The Federation · Part 2 — The Federation · Regulations for MRCP(UK) Examination Candidates — version 2.2

How should the written blueprint allocations be interpreted?

Each written blueprint totals 200 questions. Part 1 assigns 25 to Clinical sciences and 15 to Clinical Pharmacology and Therapeutics. Part 2 Written retains the existing allocation through diet 2027.2: cardiology 19; therapeutics 18; dermatology 9; endocrinology 19; gastroenterology 19; geriatrics 9; haematology 9; infectious diseases 19; ophthalmology 3; neurology 17; oncology 6; palliative medicine 3; psychiatry 3; renal medicine 19; respiratory medicine 19; rheumatology 9. From diet 2027.3, the revised allocation is: cardiology 20; therapeutics 12; dermatology 10; endocrinology 20; gastroenterology 20; geriatrics 10; haematology 10; infectious diseases 16; ophthalmology 4; neurology 16; oncology 6; palliative medicine 4; psychiatry 2; renal medicine 20; respiratory medicine 20; rheumatology 10. These are component-specific allocations, not combined diploma weights. Consult the complete official outlines for every specialty.

Part 1 Format — The Federation · Part 2 Format — The Federation · MRCP(UK) Part 2 written examination blueprint — 2026 Update

Which document dates and implementation periods are established?

Regulations version 2.2, September 2026, apply from publication. The Part 1 blueprint is effective from the 2020/1 diet. The Federation's Part 2 format webpage establishes that the existing allocation remains in use through 2027.2 and the revised allocation begins from 2027.3. The revised PDF has '2026 Update' in its filename but no printed effective date; the implementation date is established by the issuer webpage, not by the filename.

Regulations for MRCP(UK) Examination Candidates — version 2.2 · Part 1 Format — The Federation · Part 2 Format — The Federation · MRCP(UK) Part 2 written examination blueprint — 2026 Update

What does the current PACES format contain?

PACES has five stations and eight patient encounters: two communications, two consultations, and respiratory, cardiovascular, neurological and abdominal examinations. This format began in the 2023/03 diet, with Singapore adopting it in early 2024.

PACES — The Federation · PACES Format — The Federation

Which PACES skills are assessed?

The seven skills are Physical Examination, Identifying Physical Signs, Clinical Communication, Differential Diagnosis, Clinical Judgement, Managing Patients' Concerns, and Maintaining Patient Welfare. Individual skill grades are 0, 1 or 2. The official format information states no overall percentage weighting for these skills. Written learning exercises cannot substitute for observed clinical assessment.

PACES Format — The Federation

How should the linked training curriculum be used?

The Internal Medicine Stage 1 curriculum is a 2019 training document. It provides useful context for presentations, diagnostic uncertainty, comorbidity and referral needs, but does not establish a newly issued 2026 examination syllabus. Use the official examination outlines and PACES descriptors to define the complete assessment scope.

Curriculum for Internal Medicine Stage 1 Training — 2019 · Part 1 Format — The Federation · Part 2 Format — The Federation · PACES Format — The Federation

These independently authored learning materials support clinical knowledge, reasoning and communication preparation without issuer endorsement. Clinical examination and consultation skills also require directly observed practice.

Outline used: Verified on 2026-10-10: MRCP(UK) regulations version 2.2, September 2026, applicable from publication; current Part 1 blueprint effective from the 2020/1 diet; linked Part 2 Written blueprint identified by the issuer's filename as the 2026 Update, without a printed effective date; current PACES format introduced from the 2023/03 diet, with Singapore introduction in early 2024. The workbook's singular 'Royal College' label maps to the shared MRCP(UK) diploma examination of three Royal Colleges. The assigned slug is preserved and covers all three assessed components.

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.

Clinical sciencesP1:12.5%; P2:no separate allocation

1.How do sensitivity and specificity use different denominators?

Sensitivity is the proportion of people with disease who test positive: true positives divided by true positives plus false negatives. Specificity is the proportion without disease who test negative: true negatives divided by true negatives plus false positives. Both require disease status established by an appropriate reference standard. Decide which population the question conditions on before calculating; neither directly gives the probability that an individual positive result represents disease.

Apply it

A study includes 80 people with disease and 120 without it. The test identifies 72 diseased participants and correctly excludes 102 unaffected participants. Sensitivity is 90%; specificity is 85%.

Common pitfall: Dividing true positives by all positive results calculates positive predictive value. Comparison with another test that is not a reference standard measures agreement rather than necessarily establishing diagnostic accuracy.

Statistical Guidance on Reporting Results from Studies Evaluating Diagnostic Tests - Guidance for Industry and FDA Staff | FDA

2.Why does disease prevalence change positive predictive value?

Positive predictive value is the proportion of positive results that are true positives: true positives divided by true positives plus false positives. With unchanged sensitivity and specificity, lower disease prevalence creates fewer true positives relative to false positives. A positive screening result therefore carries a different probability of disease in a low-risk population than in a selected symptomatic group. Interpret the result using the tested population and clinical probability.

Apply it

Apply a test with 90% sensitivity and 90% specificity to 1,000 people, including 100 with disease. There are 90 true positives and 90 false positives, giving a positive predictive value of 50%.

Common pitfall: A sensitivity of 90% does not mean a positive result carries a 90% probability of disease. That reverses the conditional probability being measured.

Principles of Epidemiology: Lesson 5, Appendix A — CDC · Statistical Guidance on Reporting Results from Studies Evaluating Diagnostic Tests - Guidance for Industry and FDA Staff | FDA

3.How do absolute risk reduction and NNT describe treatment benefit?

Absolute risk reduction is control-event risk minus treatment-event risk for an undesirable outcome. Number needed to treat is its reciprocal when risks are expressed as proportions, conventionally rounded up to a whole patient. State the outcome and follow-up period alongside the estimate. Relative risk reduction can make a small absolute benefit appear substantial when baseline risk is low; absolute effects make the practical treatment decision easier to interpret.

Apply it

Over two years, an adverse outcome occurs in 10% of controls and 7% of treated participants. Absolute risk reduction is 0.03, so NNT is 1/0.03, rounded up to 34.

Common pitfall: Using 3 instead of 0.03 confuses percentage points with proportions. An NNT without its outcome and time horizon is incomplete and cannot be compared meaningfully with an unrelated estimate.

Cochrane Handbook, Chapter 15: Interpreting results and drawing conclusions

4.Why can vitamin B12 deficiency disrupt blood-cell production?

Vitamin B12 supports normal DNA synthesis and red-cell formation. Deficiency can impair maturation of rapidly dividing blood-cell precursors, producing megaloblastic changes and often macrocytosis. B12 also supports neurological function, so the blood count captures only part of its biological importance. An abnormal cell size can suggest the diagnosis, but a normal haemoglobin or mean cell volume cannot exclude neurological deficiency.

Apply it

A patient with a restricted diet develops glossitis, fatigue and macrocytosis. Explain how impaired DNA synthesis links inadequate intake to abnormal red-cell maturation, while asking separately about sensory symptoms and gait.

Common pitfall: Macrocytosis is a clue rather than a diagnosis. Attributing every raised mean cell volume to B12 deficiency overlooks other causes and requires biochemical assessment.

Vitamin B12: Health Professional Fact Sheet — NIH Office of Dietary Supplements

5.How does spinal compression produce symptoms below a lesion?

The spinal cord carries motor and sensory pathways between the brain and body. Compression can produce weakness, altered sensation and walking difficulty beyond the painful spinal region, with bladder or bowel dysfunction signalling additional neurological compromise. A vertebral problem is therefore not necessarily confined to local back pain. In someone with cancer, new limb or sphincter symptoms should shift reasoning toward threatened neural function and emergency assessment.

Apply it

A patient with vertebral metastases reports thoracic pain followed by heavy legs and difficulty walking. Link the distant leg symptoms to cord pathways and recognise why local tenderness alone understates the threat.

Common pitfall: Waiting for a complete neurological syndrome is unsafe. Early compression may present with pain before obvious weakness, sensory loss or sphincter dysfunction develops.

Malignant spinal cord compression: Overview — Guy's and St Thomas' NHS Foundation Trust · Metastatic spinal cord compression — The Clatterbridge Cancer Centre

6.How do feedback and receptor stimulation explain Graves' hyperthyroidism?

Pituitary TSH stimulates thyroid cells through their TSH receptors. Circulating thyroid hormones feed back to suppress pituitary TSH secretion. In Graves' disease, thyroid-stimulating immunoglobulins activate the thyroid-cell receptor, sustaining hormone production despite suppressed pituitary TSH. This connects membrane receptor signalling with endocrine feedback: low TSH with raised free thyroid hormones supports overt primary hyperthyroidism, while stimulating antibodies help establish its autoimmune cause.

Apply it

A patient has suppressed TSH, elevated free T4 and thyroid-stimulating antibodies. Explain that feedback has reduced pituitary TSH appropriately, but antibody-driven receptor stimulation continues to drive thyroid hormone production.

Common pitfall: Suppressed TSH does not mean thyroid cells receive no stimulatory signal. Low TSH alone cannot establish overt hormone excess or identify Graves' disease.

Overactive thyroid: Diagnosis — NHS · Graves’ Disease - NIDDK

7.How is alpha-1 antitrypsin inheritance related to lung risk?

Each child inherits one alpha-1 antitrypsin gene copy from each parent. When both parents carry one normal and one deficiency-associated copy, each transmits either copy with probability one-half. Each pregnancy therefore has a 25% probability of two normal copies, 50% of one of each, and 25% of two deficiency-associated copies. Deficiency reduces lung protection against injury; smoking and other exposures influence clinical expression.

Apply it

For these two carrier parents, the probability of a child receiving both deficiency-associated copies is one-half multiplied by one-half, or one-quarter. The probability applies independently to each pregnancy.

Common pitfall: The calculation depends on the specified parental genotypes. It does not mean every fourth child must be affected, and two altered copies do not predict identical symptoms or severity.

COPD - Alpha-1 Antitrypsin Deficiency | NHLBI, NIH

56.What immune mechanisms underlie coeliac antibody testing?

Coeliac serology measures an antibody response associated with gluten exposure. Tissue transglutaminase assays detect antibodies directed against a self protein, illustrating autoimmunity; deamidated gliadin peptide assays detect antibodies against modified gluten-derived peptides. IgA and IgG are distinct antibody classes. An IgA assay can miss disease when IgA production is deficient. Gluten withdrawal can also reduce the measured response.

Apply it

A gluten-consuming patient with malabsorption has low total IgA and negative transglutaminase IgA. Explain that deficient production of the measured class can account for the result and select appropriate IgG-based testing.

Common pitfall: A negative result can reflect impaired antibody production or reduced gluten exposure. Antibody detection alone does not establish the extent of intestinal injury or exclude other causes of malabsorption.

Celiac Disease Tests — NIDDK

Clinical Pharmacology and TherapeuticsP1:7.5%; P2:6%

8.Why is inflammatory-disease methotrexate usually taken weekly?

Methotrexate for inflammatory conditions is usually prescribed once weekly, on the same day each week. Confusing this schedule with daily administration can cause serious toxicity through excessive cumulative exposure. Verify the indication, weekly amount, tablet strength, tablet count and dosing day. Folic acid is commonly prescribed to reduce adverse effects and has its own schedule, usually on a different day. Oncology regimens follow separate specialist protocols.

Apply it

A patient with rheumatoid arthritis describes taking methotrexate every morning. Treat this as a potential serious dosing error and arrange urgent assessment, checking the prescription, preparation strength and last doses.

Common pitfall: Tablet count and drug amount are not interchangeable. Folic acid does not neutralise an accidental methotrexate overdose or make daily inflammatory-disease dosing safe.

How and when to take methotrexate — NHS

9.How do oral anticoagulant mechanisms determine monitoring?

Warfarin reduces synthesis of vitamin K-dependent clotting factors and is monitored using INR. Dabigatran directly inhibits thrombin; apixaban, rivaroxaban and edoxaban inhibit factor Xa. Routine INR does not quantify their anticoagulant effects reliably. Warfarin interactions can alter INR, while DOAC interactions can alter exposure without a useful INR signal. Identify the medicine and its mechanism before deciding which laboratory result can answer the clinical question.

Apply it

An anticoagulated patient starts another medicine. For warfarin, review the interaction and INR plan. For a DOAC, assess the specific interaction, renal function and evidence of bleeding rather than relying on INR.

Common pitfall: A normal INR cannot demonstrate absence of clinically relevant DOAC activity. Lack of routine INR monitoring also does not remove the need for clinical and renal review.

1463 · Pradaxa 150 mg hard capsules - Summary of Product Characteristics (SmPC) - (emc) | 4703

10.What should happen if acute renal failure develops during dabigatran treatment?

Stop dabigatran when acute renal failure develops. Substantial renal elimination means reduced clearance increases exposure and bleeding risk. In adults, creatinine clearance below 30 ml/min is a contraindication. Cockcroft-Gault creatinine clearance is the specified adult prescribing calculation, but creatinine-based estimates become unreliable during rapid renal change. Urgently assess renal deterioration, recent dosing and bleeding risk, then arrange an appropriate anticoagulation plan.

Apply it

An adult taking dabigatran develops dehydration, rapidly rising creatinine and acute renal failure. Stop dabigatran and urgently assess the illness rather than waiting for a more reassuring calculated clearance.

Common pitfall: A lower maintenance dose is not an adequate response to acute renal failure. Alternative anticoagulation must account for residual dabigatran, bleeding risk and renal function rather than being added automatically.

Pradaxa 150 mg hard capsules - Summary of Product Characteristics (SmPC) - (emc) | 4703 · Clinical Measurements & eGFR Accuracy - NIDDK

11.When does extra methotrexate require urgent action?

Taking more methotrexate than prescribed requires urgent medical advice, even if the person initially feels well. Early absence of symptoms does not establish safety after excessive exposure. Establish the indication, formulation, amount, timing and other medicines so that the receiving clinician can assess the risk accurately. Do not improvise a compensating schedule or wait for mouth ulcers, fever or other evidence of toxicity before seeking assessment.

Apply it

A patient treated for psoriasis took the prescribed weekly amount on consecutive days. Arrange immediate medical advice and provide the packaging and dosing history rather than suggesting observation until the next appointment.

Common pitfall: Skipping a later dose is not an adequate response to possible overdose. A revised calendar does not assess or reverse the exposure already received.

How and when to take methotrexate — NHS

35.What action is required for fever or sore throat during antithyroid treatment?

Stop the antithyroid medicine immediately and arrange urgent clinical assessment and a full blood count with differential. Fever, persistent sore throat or mouth ulcers can indicate agranulocytosis, a profound reduction in neutrophils that can lead to life-threatening infection. These symptoms do not prove agranulocytosis, but continued dosing while awaiting assessment is inappropriate. Restarting requires clinical advice after blood results and clinical findings have been assessed.

Apply it

In this infectious-diseases crossover, a patient taking carbimazole develops fever and persistent sore throat. Stop the medicine immediately and obtain urgent assessment with a blood count and differential, including assessment of the infection.

Common pitfall: A previously normal blood count does not establish the current neutrophil count. Symptomatic improvement alone is not a sufficient basis for restarting treatment.

Side effects of carbimazole - NHS · Propylthiouracil 50 mg Tablets - Summary of Product Characteristics (SmPC) - (emc) | 14252

36.What monitoring should accompany antibiotics in a patient taking warfarin?

Antibiotics can alter gut flora and vitamin K availability, changing warfarin response and INR. Specific drug interactions, infection and dietary changes may also destabilise control. Check the particular interaction and arrange closer INR monitoring when antibiotics start; reassess when an interacting medicine stops. A previously stable dose does not guarantee stable anticoagulation during infection treatment, so communicate medication changes to the anticoagulation service.

Apply it

In this infectious-diseases crossover, a patient on warfarin starts antibiotics for a bacterial infection. Coordinate earlier INR checks and communicate the antibiotic, treatment duration and stop date so that monitoring reflects the changing exposure.

Common pitfall: Do not apply a universal warfarin dose reduction to every antibiotic. Adjust treatment using the specific interaction, clinical circumstances and INR rather than assumption.

1463

CardiologyP1:7%; P2:10%

12.How should suspected atrial fibrillation be confirmed?

Atrial fibrillation produces disorganised atrial electrical activity and commonly an irregular pulse. Palpitations, breathlessness or fatigue can raise suspicion, but symptoms and pulse findings do not identify the rhythm reliably enough alone. An electrocardiogram records cardiac electrical activity and provides rhythm confirmation. Distinguish the clinical clue from the confirming investigation: an irregular pulse triggers assessment, while a tracing establishes what rhythm was present during the recording.

Apply it

An older adult reports intermittent palpitations and has an irregular pulse during consultation. Obtain an ECG before assuming the pulse pattern alone establishes atrial fibrillation or determines treatment.

Common pitfall: Palpitations are nonspecific, and some people with atrial fibrillation have few symptoms. Neither symptom intensity nor its absence reliably determines the rhythm.

Atrial fibrillation — NHS · Electrocardiogram — NHS

13.Why can a normal resting ECG miss intermittent arrhythmia?

A resting ECG samples electrical activity over a limited period. An intermittent rhythm disturbance may have stopped before the tracing is obtained, leaving a normal recording between episodes. Ambulatory ECG monitoring extends observation and can relate symptoms to the rhythm occurring at that time. The decision to investigate further should follow the temporal pattern: a normal snapshot establishes what happened during that snapshot rather than throughout the preceding week.

Apply it

A patient experiences brief racing-heart episodes several times weekly, but the clinic ECG is normal. Consider ambulatory recording and correlate the symptom diary with the electrical rhythm.

Common pitfall: A normal tracing between episodes does not prove palpitations are psychological. Symptoms without a recorded rhythm should also not be labelled a specific arrhythmia.

Electrocardiogram — NHS · Atrial fibrillation — NHS

14.Why is stroke prevention separate from symptom control in AF?

Atrial fibrillation can promote clot formation within the heart, creating a risk of embolic stroke. Anticoagulation addresses that thromboembolic risk, whereas rate or rhythm treatment addresses the rhythm disturbance and its consequences. A patient who feels better or has a slower pulse may still need stroke prevention. Assess stroke risk and bleeding risk separately; symptom relief alone is not evidence that embolic risk has disappeared.

Apply it

A patient feels well after rate-control treatment and asks to stop anticoagulation. Explain the distinct purposes of the medicines and review individual stroke and bleeding risks before changing treatment.

Common pitfall: A comfortable patient with a controlled pulse is not automatically protected from stroke. Do not use improvement in palpitations as a substitute for thromboembolic risk assessment.

Atrial fibrillation — NHS

15.Which cardiac question is answered by echocardiography?

Echocardiography uses ultrasound to assess cardiac structure, pumping function and valve disease. It answers different questions from an ECG, which records electrical activity. With breathlessness, oedema or a murmur, distinguish a structural or functional question from a rhythm question. The investigations can complement each other: an ECG may identify atrial fibrillation, while echocardiography assesses associated ventricular function or valve abnormalities that influence the broader clinical assessment.

Apply it

A patient with exertional breathlessness has a newly detected murmur. Select echocardiography to assess the valve and cardiac function rather than expecting an electrical tracing to show valve structure or movement.

Common pitfall: A normal ECG does not establish normal valves or pumping function. Matching the investigation to the physiological question prevents false reassurance from an unrelated result.

Echocardiogram — NHS · Electrocardiogram — NHS

16.How do weight trends help assess heart-failure congestion?

Heart failure can cause fluid retention, producing peripheral oedema, breathlessness and increasing body weight. Diuretics help remove excess salt and water and can improve congestion-related symptoms. Weight trends can help recognise deterioration, but must be interpreted alongside symptoms and the agreed care plan. Monitoring does not by itself identify the cause of a change or justify an unsupervised medication adjustment.

Apply it

A person with known heart failure reports rising weight, tighter shoes and worsening breathlessness. Recognise a coherent pattern of possible fluid retention and arrange review rather than interpreting the weight change alone.

Common pitfall: A single measurement cannot distinguish fluid from other causes of weight change. Use consistent measurements, the trend and associated symptoms rather than assuming every increase represents congestion.

Heart failure — NHS

DermatologyP1:4%; P2:5%

17.Which skin pattern supports plaque psoriasis?

Plaque psoriasis commonly produces well-defined, thickened areas of inflamed skin with scale, often involving elbows, knees, scalp or the lower back. Appearance varies with skin tone, so colour alone is an unreliable discriminator. Distribution, plaque definition, scale and associated nail or joint findings provide a stronger pattern. Examine beyond the most visible lesion and ask about symptoms indicating a broader psoriatic phenotype.

Apply it

A patient has recurrent sharply bordered scaly plaques over both elbows and the scalp. Examine the remaining skin and nails, then ask about joint stiffness rather than assessing the elbows as isolated abrasions.

Common pitfall: Do not require bright redness to recognise psoriasis across skin tones. Scale and distribution matter, while an atypical lesion still requires an appropriate differential diagnosis.

Psoriasis — NHS

18.Why do nail changes in psoriasis prompt joint questions?

Psoriasis may involve nails as well as skin, causing pitting, discolouration or separation from the nail bed. It can also be associated with psoriatic arthritis. Nail findings invite a targeted history of joint pain, swelling and stiffness rather than a purely cosmetic discussion. They do not establish arthritis alone, but a psoriatic skin or nail pattern combined with inflammatory musculoskeletal symptoms should broaden assessment beyond topical treatment.

Apply it

A patient seeking help for pitted nails also describes swollen fingers and persistent morning stiffness. Consider associated psoriatic arthritis and assess the joints rather than attributing discomfort to manual work.

Common pitfall: Nail abnormalities are not unique to psoriasis. Fungal disease and trauma remain alternatives, and psoriasis does not explain every new joint complaint.

Psoriasis — NHS

Endocrinology, diabetes and metabolic medicineP1:7%; P2:10%

19.Which results distinguish overt from subclinical hyperthyroidism?

Overt primary hyperthyroidism is supported by low TSH with raised circulating thyroid hormone concentrations. Low TSH with free T4 and T3 within their reference ranges is a different biochemical pattern, termed subclinical hyperthyroidism. Symptoms overlap and cannot make this distinction reliably. Interpret the complete panel using laboratory ranges, then consider cause and context. Subclinical describes the biochemical pattern rather than guaranteeing absence of symptoms or clinical significance.

Apply it

Two patients have suppressed TSH. One has elevated free T4; the other's free T4 and T3 remain within range. Classify the biochemical patterns separately before investigating their causes.

Common pitfall: Low TSH alone does not establish overt hyperthyroidism. Normal free T4 cannot finish the interpretation when T3 has not been considered.

Overactive thyroid: Diagnosis — NHS

20.When can T3 reveal hormone excess despite normal free T4?

Thyroid assessment includes TSH, T4 and T3 because hormone excess does not always raise both circulating hormones together. Suppressed TSH with raised T3 and normal free T4 can represent overt thyroid hormone excess, often described as T3 thyrotoxicosis. A normal free T4 should therefore not automatically end investigation of a convincingly suppressed TSH. The discriminating clue is the discordance between the hormone measurements.

Apply it

A patient has weight loss, tremor and suppressed TSH, but normal free T4. Check T3 before calling the pattern subclinical or dismissing thyroid hormone excess as an explanation.

Common pitfall: Subclinical hyperthyroidism requires normal circulating thyroid hormone measurements. Applying that label after seeing only a normal free T4 can miss isolated T3 elevation.

Overactive thyroid: Diagnosis — NHS

21.When does type 2 diabetes with CKD support SGLT2 inhibitor treatment?

KDIGO recommends an SGLT2 inhibitor for type 2 diabetes with CKD when eGFR is at least 20 ml/min/1.73 m². Treatment reduces kidney and cardiovascular risk. A reversible initial eGFR decrease generally does not require discontinuation. Withhold treatment during prolonged fasting, surgery or critical illness because ketosis risk increases. The prescribing decision therefore includes both long-term benefit and a practical plan for temporary interruption.

Apply it

A patient with type 2 diabetes, established CKD and eGFR 38 ml/min/1.73 m² merits assessment for SGLT2 treatment, including advice about interruption around surgery or prolonged fasting.

Common pitfall: Do not interpret every early eGFR dip as toxicity. Conversely, do not continue treatment automatically through circumstances associated with increased ketosis risk.

KDIGO-2024-CKD-Guideline.pdf

22.How does advanced CKD change metformin prescribing?

Metformin should be avoided in CKD G4 and G5, corresponding to eGFR below 30 ml/min/1.73 m². Diabetes treatment requires review as kidney function deteriorates, even when the existing regimen previously controlled glucose satisfactorily. A satisfactory glucose result does not establish that a medicine remains suitable at the current level of kidney function. Check the renal trend and the complete medication list before renewing treatment.

Apply it

A patient with type 2 diabetes has stable eGFR measurements of 26 and 27 ml/min/1.73 m² while taking metformin. Review and replace the unsuitable treatment rather than renewing it solely because glucose control is satisfactory.

Common pitfall: Do not apply stable CKD categories uncritically during rapidly changing creatinine. Acute deterioration also requires prompt medication review and assessment of the underlying illness.

CKD staging | UK Kidney Association

Gastroenterology and HepatologyP1:7%; P2:10%

23.Which initial serology is useful for suspected coeliac disease?

Tissue transglutaminase IgA is a useful initial serological test for coeliac disease in most patients, provided IgA production is adequate and the patient consumes gluten. Starting a gluten-free diet before investigation can reduce the immune signal and make testing falsely reassuring. Ask about actual dietary intake before interpreting a negative result. Symptomatic improvement after gluten avoidance is not specific proof of coeliac disease.

Apply it

An adult with chronic diarrhoea, weight loss and unexplained iron deficiency still eats gluten. Choose tissue transglutaminase IgA with total IgA rather than advising dietary exclusion before testing.

Common pitfall: Negative serology during gluten avoidance is not equivalent to a negative result during adequate gluten exposure. If gluten has already been excluded, arrange a clinician-led diagnostic plan.

Celiac Disease Tests — NIDDK

24.Why does IgA deficiency change coeliac test selection?

An IgA-based antibody assay requires sufficient IgA production. In IgA deficiency, tissue transglutaminase IgA can be negative despite coeliac disease. Appropriate IgG-based transglutaminase or deamidated gliadin peptide testing addresses this limitation. Persistent clinical suspicion still warrants specialist assessment; duodenal biopsy commonly contributes to confirmation in adults. Negative serology does not end the investigation of unexplained malabsorption.

Apply it

A patient with malabsorption has negative tissue transglutaminase IgA but markedly reduced total IgA. Select an appropriate IgG-based assay and continue assessment rather than concluding that the negative IgA assay excludes disease.

Common pitfall: Repeating the same IgA assay without addressing deficiency preserves the original blind spot. Consider alternative causes of malabsorption as well as the limitations of coeliac testing.

Celiac Disease Tests — NIDDK

25.When should liver disease prompt alpha-1 antitrypsin testing?

Alpha-1 antitrypsin deficiency is inherited and can cause liver disease as well as emphysema or bronchiectasis. Liver manifestations may occur before lung symptoms. Unexplained liver disease with a family history of deficiency or early lung disease should prompt consideration of an alpha-1 antitrypsin blood level. Genetic testing can confirm deficiency and identify the variant, connecting the patient's findings with an inherited multisystem disorder.

Apply it

A patient with unexplained liver disease reports that a sibling developed emphysema unusually young. Request alpha-1 antitrypsin assessment rather than requiring respiratory symptoms in the patient before considering the diagnosis.

Common pitfall: Jaundice is nonspecific. A suggestive family pattern directs investigation but does not establish the cause of liver disease or exclude a second hepatic disorder.

COPD - Alpha-1 Antitrypsin Deficiency | NHLBI, NIH

26.What action is required for suspected propylthiouracil-associated liver injury?

Stop propylthiouracil immediately when clinically apparent liver injury is suspected, and arrange urgent liver tests and specialist assessment. Jaundice, dark urine, loss of appetite or abdominal discomfort during treatment are warning symptoms. Propylthiouracil can cause severe liver injury and acute liver failure. Assessment should include bilirubin, alkaline phosphatase and ALT/AST while considering other hepatic or biliary causes.

Apply it

A patient taking propylthiouracil develops yellow eyes, poor appetite and abdominal discomfort. Stop the drug, obtain urgent liver tests and arrange urgent assessment, including a plan for continued treatment of hyperthyroidism.

Common pitfall: Investigate alternative causes without continuing the suspected hepatotoxic drug while awaiting proof. Previously reassuring liver tests do not exclude a new, rapidly developing reaction.

Propylthiouracil 50 mg Tablets - Summary of Product Characteristics (SmPC) - (emc) | 14252 · Propylthiouracil Tablets, USP

Geriatric medicineP1:4%; P2:5%

27.Which pattern identifies delirium, including its hypoactive form?

Delirium is an acute change over hours or days with fluctuating attention and awareness. It may cause agitation or present quietly with drowsiness, withdrawal and reduced engagement. Establish baseline function using collateral information; dementia can coexist with superimposed delirium. Investigate interacting contributors such as acute illness, dehydration, pain, constipation and medicines, while supporting orientation, hydration and sensory needs.

Apply it

A resident with mild dementia becomes sleepy and inattentive over one day. Relatives confirm an abrupt change. Assess for hypoactive delirium and investigate acute illness and medication effects rather than assuming dementia progression.

Common pitfall: Absence of agitation is not reassuring. Finding one trigger does not exclude additional contributors, and a positive assessment tool still requires clinical evaluation of the cause.

Delirium (acute confusion) — NHS Royal Devon · 4AT Delirium Detection Test: Complete Clinical User Guide

28.Why can creatinine-based eGFR overestimate filtration in frailty?

Creatinine concentration reflects muscle production as well as renal elimination. A frail older adult with low muscle mass may produce little creatinine, yielding an overoptimistic estimate of filtration. When accuracy would change a consequential prescribing decision, consider combined creatinine-cystatin C estimation or measured filtration as appropriate. Cystatin C also has limitations, including effects of inflammation, thyroid dysfunction and steroid treatment.

Apply it

A markedly sarcopenic older adult has a reassuring creatinine-based eGFR before a medicine requiring accurate renal assessment is prescribed. Review muscle mass and the medicine's required renal measure before accepting the estimate.

Common pitfall: Creatinine within its reference range does not prove normal filtration in someone with little muscle mass. Cystatin C is also influenced by factors other than filtration.

Clinical Measurements & eGFR Accuracy - NIDDK

29.How should falls influence anticoagulation decisions in an older adult?

A history or risk of falls alone should not lead to withholding anticoagulation for atrial fibrillation. Assess stroke risk and bleeding risk, then address modifiable hazards and practical treatment needs. Review renal function, interacting medicines, adherence and the circumstances of falls, and discuss benefits and harms with the patient. Falls contribute to an individual assessment but do not automatically outweigh stroke prevention.

Apply it

An older adult with AF and an indication for stroke prevention reports two falls. Review their causes, injuries, renal function and medicines, and discuss anticoagulation alongside measures to reduce falls.

Common pitfall: Avoid both automatic withholding and automatic continuation without review. Active bleeding or a specific contraindication requires its own immediate decision rather than being subsumed under the falls history.

1463

HaematologyP1:5%; P2:5%

30.Why can vitamin B12 deficiency matter without anaemia?

Vitamin B12 deficiency can cause neurological manifestations even when anaemia or macrocytosis is absent. Sensory disturbance, impaired balance or cognitive symptoms deserve assessment when the context suggests deficiency. Integrate symptoms with biochemical evidence and risks from inadequate intake or impaired absorption. Absorption depends on gastric processing, intrinsic factor and the distal small intestine, so deficiency can occur despite an adequate diet.

Apply it

A patient who eats animal-source foods develops tingling and unsteadiness after gastric surgery but has normal haemoglobin. Assess B12 status and impaired absorption rather than dismissing deficiency because intake and the blood count seem reassuring.

Common pitfall: Normal haemoglobin does not establish adequate B12 status, and dietary intake does not prove successful absorption. Neurological symptoms still require an appropriate differential diagnosis.

Vitamin B12: Health Professional Fact Sheet — NIH Office of Dietary Supplements

31.How does methylmalonic acid clarify a borderline B12 result?

Vitamin B12 is required for a metabolic reaction involving methylmalonyl-CoA. Functional deficiency can therefore increase methylmalonic acid, making it useful when serum B12 is borderline and clinical suspicion remains. Interpretation is not completely specific: impaired renal function can also raise methylmalonic acid. Pair the result with kidney function and the clinical pattern rather than treating a metabolic marker as an isolated diagnostic verdict.

Apply it

A patient with sensory symptoms has borderline serum B12 and elevated methylmalonic acid. Check renal function before deciding how strongly the metabolic result supports deficiency, particularly if chronic kidney disease is present.

Common pitfall: An elevated methylmalonic acid level is not uniquely caused by B12 deficiency. Ignoring renal impairment can make supportive evidence appear more definitive than it is.

Vitamin B12: Health Professional Fact Sheet — NIH Office of Dietary Supplements · Methylmalonic acid (serum)

32.How does thrombotic antiphospholipid syndrome change anticoagulant selection?

DOACs are not recommended for patients with previous thrombosis and established antiphospholipid syndrome, particularly those positive for lupus anticoagulant, anticardiolipin antibodies and anti-beta-2-glycoprotein I antibodies. Recurrent thrombosis can be more frequent with DOACs than vitamin K antagonists in this setting. Warfarin is generally the relevant oral alternative, with specialist planning and INR monitoring. Convenience alone does not justify switching an effective regimen.

Apply it

A patient with previous thrombosis and confirmed triple-positive antiphospholipid syndrome requests a DOAC to avoid INR testing. Explain the recurrence concern and retain specialist-directed vitamin K antagonist treatment.

Common pitfall: A single positive antibody result does not establish thrombotic antiphospholipid syndrome. Apply this treatment decision to the established clinical diagnosis rather than an isolated laboratory finding.

1463 · Direct-acting oral anticoagulants (DOACs): increased risk of recurrent thrombotic events in patients with antiphospholipid syndrome - GOV.UK

Infectious diseasesP1:7%; P2:8%

33.What does a positive tuberculosis infection test establish?

A positive tuberculosis blood test or skin test supports infection but does not distinguish inactive infection from active disease. Clinical assessment, chest imaging and sometimes sputum testing establish disease status. BCG vaccination can affect skin-test interpretation but does not explain a positive tuberculosis blood test. A blood test is therefore useful in a previously BCG-vaccinated person, while still requiring assessment for active disease if positive.

Apply it

An asymptomatic BCG-vaccinated contact has a positive tuberculosis blood test. Arrange assessment for active disease rather than attributing the result to vaccination or assuming contagious pulmonary tuberculosis.

Common pitfall: Infection, active disease and infectiousness are separate questions. An immune-based test alone cannot answer all three, and absence of symptoms does not exclude infection.

About Inactive Tuberculosis — CDC

34.Why treat inactive tuberculosis when it is not contagious?

Inactive tuberculosis means bacteria remain in the body without causing active disease. The person is not contagious in this state, but infection can progress to active disease later. Preventive treatment reduces future progression risk rather than treating current symptoms or current transmission. Active disease must first be excluded because its treatment approach differs. Explain these distinct objectives so that absence of symptoms does not undermine understanding of treatment.

Apply it

A patient with inactive tuberculosis worries about colleagues and questions the need for medication. Explain that infection is not currently transmissible while treatment aims to reduce future progression.

Common pitfall: Not contagious does not mean the bacteria have been eliminated. New symptoms suggesting active disease require reassessment rather than unquestioned continuation along a preventive pathway.

About Inactive Tuberculosis — CDC

39.Which findings support scabies, and who needs treatment?

Ordinary scabies commonly causes intense nocturnal itch, raised spots and burrows, especially between fingers and around wrists, the waist and groin. Ask about close contacts with itching. Treat household members simultaneously even if asymptomatic, because symptoms can take up to eight weeks to appear; sexual contacts from the preceding eight weeks also need treatment. Follow the prescribed whole-body application instructions and repeat treatment seven days later.

Apply it

An adult develops nocturnal itching and finger-web burrows, and a partner has begun scratching. Arrange treatment for the patient and relevant contacts together rather than treating only the most symptomatic person.

Common pitfall: Persistent itching for a few weeks after treatment does not alone prove continuing infestation. A crusted, flaky eruption, particularly in an immunocompromised person, requires assessment for highly contagious crusted scabies.

Scabies - NHS

40.When does an eczematous eruption require assessment for secondary infection?

Contact dermatitis follows exposure to an irritant or allergen and may cause dryness, itching, cracking or blisters. Rapid worsening, discharge, increasing pain, systemic malaise or feeling hot, cold or shivery raises concern for secondary infection. This change from the preceding skin pattern warrants prompt clinical assessment because antimicrobial treatment may be needed. Exposure-related inflammation and infection can coexist.

Apply it

A patient with hand dermatitis after detergent exposure develops increasing pain, discharge and shivering. Seek immediate medical assessment rather than treating the change solely as another dermatitis flare.

Common pitfall: Itching or redness alone does not establish infection. Conversely, a known inflammatory skin diagnosis should not explain away new discharge, escalating pain or systemic illness.

Contact dermatitis - Symptoms - NHS

NeurologyP1:7%; P2:8%

37.How are parkinsonism and its underlying cause established?

MDS motor criteria require bradykinesia with rest tremor or rigidity. Bradykinesia means slowness with decrement in amplitude or speed, or progressive hesitations during repeated movements. Test finger or foot tapping while accounting for pain, weakness and comprehension. Parkinson's disease then requires assessment of absolute exclusions, red flags and supportive criteria. Clinically established disease requires no absolute exclusions, at least two supportive criteria and no red flags; clinically probable disease permits no more than two red flags, each counterbalanced by a supportive criterion.

Apply it

A patient has slow finger taps that progressively shrink, with sustained velocity-independent resistance to passive wrist movement and no tremor. This establishes bradykinesia with rigidity. Assess progression, treatment response, medicines and atypical findings before assigning the cause.

Common pitfall: Tremor alone or slowness without decrement does not establish parkinsonism. Unexplained cerebellar abnormalities are an absolute exclusion for Parkinson's disease; recurrent balance-related falls more than once yearly within three years are a red flag.

mds-clinical-diagnostic-criteria-for-parkinson%27s-disease.pdf

38.When should medication exposure suggest drug-induced parkinsonism?

Review dopamine-receptor-blocking and dopamine-depleting medicines when parkinsonism appears. A dose and time course consistent with drug-induced parkinsonism constitutes an absolute exclusion for Parkinson's disease under MDS criteria. Establish the medicine, indication, dose changes and temporal relationship to motor symptoms, then arrange supervised medication review. Exposure alone is insufficient when its dose or timing does not plausibly explain the syndrome.

Apply it

Bradykinesia and rigidity begin after a substantial increase in a dopamine-receptor-blocking medicine. Assess the temporal relationship and coordinate prescribing review before assigning an idiopathic degenerative diagnosis.

Common pitfall: Do not treat any historical prescription as proof of causation or abruptly stop essential psychiatric treatment. Drug-induced symptoms and an underlying degenerative disorder may require specialist differentiation.

mds-clinical-diagnostic-criteria-for-parkinson%27s-disease.pdf

OncologyP1:2.5%; P2:3%

41.When does back pain in a patient with cancer require escalation?

New or progressive spinal pain in someone with cancer can indicate metastatic spinal disease. Ask specifically about weakness, altered sensation, walking difficulty and bladder or bowel dysfunction. These neurological features make suspected metastatic spinal cord compression an oncological emergency requiring immediate MSCC-team contact. Pain can precede neurological loss, so do not wait for paralysis or incontinence before escalating a concerning presentation.

Apply it

A patient with cancer develops worsening back pain and tingling in both legs. Contact the MSCC team immediately and initiate the emergency pathway even if measured power is currently preserved.

Common pitfall: Normal strength at one assessment does not neutralise evolving sensory symptoms or exclude early compression. Routine physiotherapy is inappropriate while threatened cord function remains unresolved.

Malignant spinal cord compression: Overview — Guy's and St Thomas' NHS Foundation Trust · MSCC Pathway | NELSE Spinal Network

42.What immediate management is required for suspected MSCC?

Suspected metastatic spinal cord compression (MSCC) with neurological symptoms or signs is an oncological emergency: contact the MSCC coordinator immediately, give dexamethasone 16 mg orally or an equivalent parenteral dose as soon as possible, and continue 16 mg daily while awaiting surgery or radiotherapy. Arrange MRI as soon as possible and always within 24 hours. Provide analgesia. Start immobilisation without delay, including during transfer, for suspected or confirmed MSCC with neurological symptoms or signs suggesting spinal instability; pain is not an additional requirement. Separately, consider immobilisation for suspected or confirmed spinal metastases or MSCC with moderate-to-severe movement-related pain. When immobilising, minimise spinal weight bearing, usually by lying supine; adjust positioning if pain or breathlessness prevents this. Seek expert advice within 24 hours to assess stability and minimise immobilisation duration.

Apply it

A patient with metastatic cancer develops worsening walking and urinary retention. Activate emergency MSCC assessment, administer dexamethasone and arrange urgent MRI. If neurological findings suggest spinal instability, immobilise immediately even if back pain is absent. In another patient with spinal metastases and no neurological findings, moderate-to-severe pain on movement warrants consideration of immobilisation and early stability assessment.

Common pitfall: Do not require both neurological findings and pain before immediate immobilisation when instability is suggested. Conversely, mild movement-related discomfort alone is not an automatic immobilisation indication. Do not delay indicated emergency treatment until imaging confirms compression; a coexisting urinary infection does not explain away progressive neurological dysfunction.

MSCC Pathway | NELSE Spinal Network · nice_full_metastatic_spinal_cord_compression.pdf

Medical ophthalmologyP1:2%; P2:2%

43.Which glaucoma presentation is an eye emergency?

Glaucoma damages the optic nerve and may develop gradually without early symptoms. Sudden severe eye pain with redness, blurred vision or coloured haloes, sometimes accompanied by headache, nausea or vomiting, is a different and urgent presentation. Immediate assessment is required because vision may be threatened. Gastrointestinal symptoms do not exclude an ocular emergency, and lack of a long history does not make an acutely painful eye benign.

Apply it

A patient develops a painful red eye, misty vision, haloes and vomiting over several hours. Arrange immediate emergency assessment rather than waiting for routine optometry or treating presumed migraine.

Common pitfall: Do not require every symptom before escalating. Chronic glaucoma can be painless, so absence of pain does not establish a healthy optic nerve.

Glaucoma — NHS

Palliative medicine and end of life careP1:2%; P2:2%

44.How can simple measures reduce the experience of breathlessness?

A handheld fan directed toward the face, comfortable supported positioning and controlled breathing can reduce distress associated with breathlessness. These strategies can help people manage episodes and regain control even when the underlying condition cannot be rapidly reversed. They complement assessment and treatment of the cause. Match the approach to the person's comfort and preferences, while distinguishing familiar persistent breathlessness from a new deterioration.

Apply it

A patient with stable chronic breathlessness becomes anxious after walking to a chair. Offer supported positioning, gentle facial airflow and calm breathing guidance while checking whether this episode differs from the usual pattern.

Common pitfall: A fan provides symptom relief; it does not establish adequate oxygenation or a harmless cause. New or severe deterioration still requires clinical assessment.

Ten tips for managing breathlessness — Cambridge University Hospitals

PsychiatryP1:4.5%; P2:1%

45.How do DSM criteria distinguish mania from hypomania?

Both involve a distinct change to elevated or irritable mood and increased energy or activity, with features such as reduced sleep need, rapid speech, racing thoughts and risky behaviour. Mania lasts at least one week, or any duration if hospitalisation is necessary, and involves marked impairment, hospitalisation or psychosis. Hypomania lasts at least four consecutive days without marked impairment, hospitalisation or psychosis. Duration alone cannot distinguish the episodes.

Apply it

Five days of little sleep need, pressured speech and reckless spending culminate in psychosis requiring hospitalisation. Hospitalisation and severity support mania despite a duration shorter than one week.

Common pitfall: Psychosis is incompatible with classifying an elevated episode as hypomania. Also assess substances, medicines and medical conditions that could explain the presentation.

Psychiatry.org - What Are Bipolar Disorders? · Bipolar Disorder - National Institute of Mental Health (NIMH)

46.Why does bipolar diagnosis require a longitudinal mood history?

Under DSM criteria, bipolar I requires a manic episode; a depressive episode is not required. Bipolar II requires at least one hypomanic episode and one major depressive episode, with no manic episode. During depression assessment, explore previous elevated or irritable episodes, duration, reduced sleep need, impairment, psychosis and hospitalisation. Hypomania may be remembered as productive, making concrete examples and collateral information useful.

Apply it

A patient presenting with depression recalls five days of increased energy and reduced sleep need without marked impairment or psychosis. Establish the full hypomanic pattern and whether mania has ever occurred before considering bipolar II.

Common pitfall: Ordinary good days are not hypomania. Absence of previous depression does not exclude bipolar I when a qualifying manic episode has occurred.

Psychiatry.org - What Are Bipolar Disorders? · Bipolar Disorder - National Institute of Mental Health (NIMH)

Renal medicineP1:7%; P2:10%

47.Why is eGFR unreliable during rapidly changing creatinine?

Creatinine-based eGFR equations assume a reasonably stable relationship between creatinine production and renal elimination. During acute kidney injury, serum creatinine may rise or fall before a steady state is reached, so the reported estimate can misrepresent current filtration. Assess the trend and clinical context rather than treating the automatically reported number as a precise measurement. Acute changes do not establish stable chronic staging.

Apply it

A dehydrated inpatient's creatinine rises substantially between blood tests. Review the evolving acute process and creatinine trend rather than using the accompanying eGFR to assign a definitive chronic kidney stage.

Common pitfall: An automatically calculated result is not automatically physiologically valid. Rapidly changing creatinine violates an important assumption even when the laboratory prints a precise numerical eGFR.

Quick Reference on UACR & GFR — NIDDK · Clinical Measurements & eGFR Accuracy - NIDDK

48.How does urine ACR complement eGFR?

Urine albumin-to-creatinine ratio compares urinary albumin with creatinine, reducing the influence of dilution in a spot sample. It assesses albumin leakage, while eGFR assesses filtration. Either can be abnormal independently: preserved filtration does not exclude albuminuric damage, and reduced filtration does not require albuminuria to be important. Confirm abnormal albuminuria appropriately and consider transient influences such as urinary infection before establishing persistence.

Apply it

A patient has preserved eGFR but repeatedly elevated ACR after urinary infection resolves. Recognise persistent albumin leakage as evidence requiring assessment rather than declaring kidney health normal from filtration alone.

Common pitfall: Albumin concentration alone is affected by urine dilution. Do not assume one reassuring measurement cancels an abnormal result measuring a different aspect of kidney health.

Quick Reference on UACR & GFR — NIDDK · CKD staging | UK Kidney Association

49.How can kidney-failure risk guide referral in stable CKD?

The four-variable Kidney Failure Risk Equation uses age, sex, eGFR and urine ACR to estimate kidney replacement therapy risk over two or five years in CKD G3a-G5. Use the UK-calibrated version for UK practice. A five-year risk above 5% supports consideration of nephrology referral alongside wishes and comorbidities. The estimate distinguishes patients with the same GFR category but different progression risks.

Apply it

Two patients with stable CKD G3b have different ACR values and five-year risks. Discuss referral when risk exceeds 5%, explaining the estimate over its stated time horizon using natural frequencies.

Common pitfall: Do not use KFRE to defer rapid assessment of acute deterioration. Unstable creatinine, unreliable ACR and limited validation in some primary renal diseases can undermine prediction.

CKD staging | UK Kidney Association

50.Which thresholds and duration establish CKD?

CKD requires abnormalities of kidney structure or function for at least three months. Qualifying findings include GFR below 60 ml/min/1.73 m² or a marker of kidney damage, including ACR at least 3 mg/mmol. GFR of 60 or higher alone does not establish CKD. Review previous results and confirm persistence while addressing any acute problem rather than postponing assessment until chronicity is established.

Apply it

An adult has eGFR 78 ml/min/1.73 m² and ACR 8 mg/mmol on confirmed measurements four months apart. Persistent albuminuria supports CKD despite preserved filtration.

Common pitfall: One abnormal result cannot establish chronicity. An isolated eGFR of 78 without a damage marker does not establish CKD, while an acute deterioration still requires prompt treatment.

KDIGO-2024-CKD-Guideline.pdf · CKD staging | UK Kidney Association

Respiratory medicineP1:7%; P2:10%

51.How do spirometry and clinical context establish COPD?

FEV1 is the volume exhaled in the first second; FVC is the total forced vital capacity. GOLD requires post-bronchodilator FEV1/FVC below 0.70 for COPD diagnosis in a compatible clinical context. Combine the result with chronic symptoms and relevant exposures. Imaging and blood tests investigate alternatives or accompanying disease but do not replace airflow measurement. Bronchodilator improvement does not automatically exclude COPD, and limited improvement alone does not establish it.

Apply it

A smoker with chronic cough has post-bronchodilator FEV1 1.5 litres and FVC 3.0 litres: the ratio is 0.50. This meets the obstruction criterion. A normal chest X-ray would not cancel the physiological finding.

Common pitfall: FEV1 percentage predicted and FEV1/FVC are different quantities. Neither an inhaler prescription nor pre-bronchodilator obstruction alone fulfils the specified diagnostic criterion.

Spirometry Quick Guide - Global Initiative for Chronic Obstructive Lung Disease - GOLD · COPD: Diagnosis — NHS

52.How should oxygen be targeted during an acute COPD exacerbation?

For a patient with an acute COPD exacerbation at risk of hypercapnic respiratory failure, initially target oxygen saturation of 88-92% while obtaining blood gases and assessing the illness. Titrate oxygen to the target rather than using an unrestricted fixed concentration. Blood gases assess carbon dioxide and acid-base status, which pulse oximetry cannot establish. Critical illness requires immediate resuscitation, with oxygen and ventilatory support adjusted promptly to clinical findings and blood gases.

Apply it

An acutely breathless patient with COPD has room-air saturation of 84%. Start controlled oxygen targeting 88-92%, obtain blood gases and assess the cause and severity rather than leaving hypoxaemia untreated because of concern about carbon dioxide retention.

Common pitfall: An acceptable saturation does not exclude hypercapnia or respiratory acidosis. Oxygen treats hypoxaemia but does not replace assessment for ventilatory failure or treatment of the exacerbation.

Source

53.What must be planned when selecting dabigatran for pulmonary embolism?

For adult pulmonary embolism treatment, dabigatran follows at least five days of parenteral anticoagulation. Assess renal function using the required adult Cockcroft-Gault creatinine clearance and review bleeding risk, interacting medicines and suitability; creatinine clearance below 30 ml/min is a contraindication. Plan duration according to recurrence and bleeding risks: transient provoking factors support a course of at least three months, whereas persistent factors or unprovoked disease may support longer treatment.

Apply it

A stable adult with confirmed PE after major surgery is being considered for dabigatran. Verify initial parenteral treatment, renal suitability and bleeding risk, and schedule a duration review rather than assuming the same start and stop rules apply to every anticoagulant.

Common pitfall: Dabigatran is not started as an immediate oral-only regimen for adult PE. Ongoing haemodynamic instability, acute renal failure or major bleeding requires urgent reassessment rather than routine application of a maintenance plan.

Pradaxa 150 mg hard capsules - Summary of Product Characteristics (SmPC) - (emc) | 4703

54.How does alpha-1 antitrypsin deficiency change prevention and respiratory treatment?

Alpha-1 antitrypsin is produced in the liver and protects lung tissue from damage. Deficiency increases susceptibility to emphysema and bronchiectasis, so smoking cessation and avoidance of secondhand smoke, dust and pollution are central preventive measures. Established lung disease also requires appropriate inhaled treatment, vaccination and pulmonary rehabilitation. Intravenous augmentation raises alpha-1 antitrypsin concentrations and is used in selected patients with deficiency-associated emphysema in some healthcare systems, as described by the US NHLBI. Distinguish UK licensing from NHS prescribing recommendations: Respreeza is UK licensed for selected adults with severe deficiency and progressive emphysema, but the published 2016 Scottish Medicines Consortium assessment does not recommend it within NHS Scotland. The demonstrated benefit was reduced CT lung-density loss at total lung capacity; improvements in symptoms, exacerbations, lung function, quality of life or survival were not established by the assessed evidence.

Apply it

A young adult with confirmed deficiency and emphysema continues smoking and asks whether replacement protein will reverse the damage. Explain that augmentation is not a cure and does not replace smoking cessation or standard respiratory care. Discuss the measured lung-density benefit accurately, distinguish it from unproven clinical outcomes, and explain the published NHS Scotland restriction when discussing treatment availability.

Common pitfall: Neither UK marketing authorisation nor US treatment advice establishes routine NHS access. The Scottish decision should not be presented as a UK-wide funding decision. Reduced lung-density loss does not prove improved survival or symptom relief. Augmentation is not automatic treatment for carriers and does not treat the associated liver disease caused by accumulation of abnormal protein.

COPD - Alpha-1 Antitrypsin Deficiency | NHLBI, NIH · human_alpha_1_proteinase_inhibitor_respreeza_final_july_2016_updated_180716_for_website.pdf

RheumatologyP1:7%; P2:5%

55.Which joint pattern suggests inflammatory disease?

Rheumatoid arthritis commonly causes joint pain, swelling and stiffness, particularly after waking or inactivity. Ask about stiffness duration and examine for synovitis rather than relying on the word arthritis. Persistent synovitis affecting small hand or foot joints, or more than one joint, warrants urgent rheumatology referral. Blood tests support assessment but should not delay referral when clinical inflammation is evident.

Apply it

A patient describes swollen hand joints and prolonged difficulty making a fist each morning. Examine for synovitis and refer urgently if persistent small-joint inflammation is suspected rather than attributing symptoms to keyboard use.

Common pitfall: Morning stiffness is not disease-specific. Referral depends on the clinical inflammatory pattern, and normal inflammatory markers or negative antibodies do not exclude rheumatoid arthritis.

Rheumatoid arthritis: Symptoms — NHS · Out on a limb – prioritising clinical suspicion and early referral in rheumatoid arthritis diagnosis - Manchester University NHS Foundation Trust

57.Which extra-articular manifestations should a systemic history seek in suspected rheumatoid arthritis?

Rheumatoid arthritis can produce inflammation beyond synovial joints. A painful red eye raises concern for scleritis, whereas dry eyes suggest associated Sjögren's syndrome; these patterns should not be grouped as nonspecific eye discomfort. Persistent cough and breathlessness can indicate pulmonary fibrosis. Inflammation of the lung lining causes pleurisy, and inflammation around the heart causes pericarditis; both can produce chest pain. Fatigue may accompany systemic inflammation but does not identify a particular complication. These associations guide focused questioning and examination without proving that rheumatoid arthritis caused the symptom. Infection, treatment adverse effects and unrelated cardiopulmonary or ocular disease remain alternative explanations, particularly when symptoms are new, severe or atypical.

Apply it

A patient with inflammatory hand symptoms reports fatigue and new eye discomfort. Establish whether this means painful redness, suggesting scleritis and requiring urgent eye assessment, or dryness, suggesting associated Sjögren's syndrome. Ask about persistent cough, breathlessness and chest pain to identify possible pulmonary fibrosis, pleurisy or pericarditis. Assess each complaint on its own clinical features while investigating the inflammatory arthritis.

Common pitfall: Do not equate dry eyes with scleritis or assume that all chest pain is pericarditis. New breathlessness may reflect infection, drug toxicity or cardiac disease, and chest pain may have an acute cardiovascular cause. Rheumatoid arthritis increases cardiovascular risk, so recognising an inflammatory association must not prematurely close the differential diagnosis.

Rheumatoid arthritis: Symptoms — NHS · Rheumatoid arthritis - Complications - NHS

PACES clinical skillsnot stated

58.How should examination technique preserve patient welfare?

Physical examination and identifying physical signs must be accompanied by attention to patient welfare. An ordered examination is incomplete if it causes avoidable discomfort or ignores the patient's condition. Explain the examination, obtain cooperation, position appropriately and adapt when pain or instability limits manoeuvres. Report what was observed rather than converting an expected diagnosis into an assumed sign. Accurate findings and respectful technique are complementary.

Apply it

During respiratory examination, a patient becomes uncomfortable lying flat. Adapt positioning, acknowledge discomfort and continue only tolerable manoeuvres, then describe the limitation honestly when presenting findings.

Common pitfall: Completing a memorised sequence is not more important than comfort. An unperformed manoeuvre must not be reported as normal, and an expected sign must not be invented.

PACES Format — The Federation

59.How do communication and concern management work together?

Clear explanations require understandable language, but a fluent explanation can still miss the patient's principal concern. Elicit the person's understanding, priorities and worries, respond specifically, and check the resulting understanding. This turns rehearsed information delivery into a clinical conversation. Clinical Communication and Managing Patients' Concerns reinforce each other: the relevant decision is which discussion helps this patient understand and participate in care.

Apply it

A patient interrupts a diagnosis explanation to ask about continuing to care for a spouse. Explore the responsibilities and specific worries, address them directly and incorporate them into the plan.

Common pitfall: Reassurance without understanding the concern can sound dismissive. More disease facts do not necessarily answer a question about function, uncertainty or family responsibilities.

PACES Format — The Federation

60.How should a differential diagnosis become a clinical plan?

Clinical judgement links observed findings to ranked possibilities, a named next action and the result that would alter management. A differential identifies plausible explanations; judgement uses likelihood and consequences to decide what to do. Explain why each investigation addresses an uncertainty and how its result changes treatment. An unranked list without a decision does not demonstrate an actionable assessment.

Apply it

With palpitations, an irregular pulse and ankle oedema, prioritise AF and possible associated structural disease. Obtain an ECG and echocardiography. Confirmed AF prompts rate/rhythm and stroke-risk assessment; ventricular dysfunction adds heart-failure management.

Common pitfall: An irregular pulse does not establish AF. A normal resting ECG with intermittent symptoms may prompt ambulatory monitoring rather than dismissal of arrhythmia.

PACES Format — The Federation · Atrial fibrillation — NHS · Electrocardiogram — NHS · Echocardiogram — NHS

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 complete official outlines to cover subjects beyond these selected concepts, including every Clinical sciences subdivision.
Connect mechanisms to decisions: antibody class to assay selection, creatinine kinetics to eGFR limitations, and anticoagulant mechanism to monitoring.
Separate infection from active disease, cardiac rhythm from structure, and filtration from albumin leakage.
Apply discriminating criteria for bradykinesia, mood episodes, CKD chronicity and post-bronchodilator obstruction.
Plan oxygen targets, pulmonary embolism anticoagulation, scabies contact treatment and assessment of secondary skin infection.
Recognise urgent medication reactions, methotrexate dosing errors, suspected spinal cord compression and acute ocular warning symptoms.
Develop examination, concern management and clinical judgement through directly observed encounters.

A practical preparation plan

1. Map study to the assessed component

Use the full component outlines to identify objectives beyond this selective guide. Pair knowledge study with directly observed examination and consultation practice.

2. Explain mechanisms before memorising labels

Explain why the decisive cue matters, such as IgA deficiency weakening an IgA assay or changing creatinine undermining eGFR.

3. Commit to a decision before reading explanations

Answer independently, then review every alternative. Identify whether an error involved missing data, test purpose, time course or an unsupported action.

4. Rehearse clinical encounters

Seek feedback on eliciting signs, patient comfort, clear explanations, specific concerns and whether your differential produces a defensible next step.

5. Revisit decisions through active recall

Use the cards to recall rules and boundaries. Change values in numerical examples and revisit missed decisions after an interval.

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 sample

Official sources and updates

Confirm current eligibility, fees, scheduling and policies directly with the examination provider. CertMedbry is independent and is not endorsed by these organisations. How we handle content and corrections.