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MRCEM Part C · OSCE Preparation

OSCE Station Bank 7

10 new structured stations — venous thromboembolism, paediatric orthopaedics, musculoskeletal examination, safeguarding, suicide risk assessment and paediatric DKA.

0/ 10 completed
10Stations
5Domain types
8Min / station
0/10 completed
📋 History Taking
📋
Limb Swelling History — DVT Assessment
History · 8 minStation 1 of 10
8:00
Station type
History Taking
Time allowed
8 minutes
Pass mark
12 / 20
📄 Candidate Briefing
👁 Examiner Instructions
✅ Mark Scheme

📄 Candidate Instructions

You are the ED doctor. Mr Peter Collins, 52 years old, presents with a 3-day history of right calf swelling and pain. He returned from a 12-hour flight from Australia 5 days ago.

Triage obs: HR 88, BP 134/82, RR 16, SpO₂ 98% on air, Temp 37.2°C. Right calf visibly swollen.

Please take a focused history and calculate a Wells DVT score. You have 8 minutes.

💡 Key areas — Wells DVT Score, Risk Factors, Differentials ▼
  • SOCRATES for limb swelling: Site (calf, thigh, whole leg), onset and duration, character (tight, aching, throbbing), radiation, associated features (warmth, erythema, tenderness along vein, pitting vs non-pitting oedema), timing, exacerbating/relieving factors (worse on dorsiflexion = Homan's sign — low sensitivity/specificity, not reliable alone).
  • Wells DVT score criteria (2-level): Active cancer (treatment ongoing, within 6 months, or palliative) = +1. Paralysis, paresis or recent plaster immobilisation of lower limb = +1. Recently bedridden >3 days or major surgery within 12 weeks = +1. Localised tenderness along distribution of deep venous system = +1. Entire leg swollen = +1. Calf swelling >3cm compared to asymptomatic side (measured 10cm below tibial tuberosity) = +1. Pitting oedema (greater in symptomatic leg) = +1. Collateral superficial veins (non-varicose) = +1. Previously documented DVT = +1. Alternative diagnosis at least as likely as DVT = −2. Score ≥2 = DVT likely (proceed to USS); Score <2 = DVT unlikely (D-dimer first).
  • Provoked vs unprovoked: Provoked — recent surgery, immobility, flight, trauma, OCP/HRT, pregnancy. Unprovoked — malignancy screen needed, thrombophilia testing.
  • Medications: OCP, HRT, tamoxifen, thalidomide — all increase thrombotic risk. Current anticoagulants.
  • Family history: First-degree relative with VTE <50 years old — suggests thrombophilia (Factor V Leiden, prothrombin mutation, protein C/S deficiency, antithrombin deficiency).
  • Differentials: Cellulitis (erythema, warmth, systemic features, skin entry point), ruptured Baker's cyst (posterior knee pain, sudden onset), haematoma (trauma history), lymphoedema (non-pitting, chronic), muscular tear (acute onset with exercise).
  • PE symptoms to screen: Pleuritic chest pain, dyspnoea, haemoptysis, presyncope.

⚠️ Examiner / Role-player Instructions — Not for Candidate

You are Mr Peter Collins. You are concerned but not distressed. The diagnosis is a right popliteal-femoral DVT. No PE symptoms. Wells score in this scenario = 4 (DVT likely): flight immobility, calf >3cm, localised deep vein tenderness, entire leg swollen, no alternative diagnosis more likely.

🎭 Patient Script ▼
  • Swelling: Started 3 days ago — noticed his right calf was bigger than left and felt tight and aching. Has progressed to whole lower leg. Mild redness over calf. No skin breaks. No fever.
  • Recent immobility: 12-hour flight Sydney to London, 5 days ago. Sat in a window seat, drank some alcohol, didn't move much. No aisle exercises.
  • Other Wells criteria: No recent surgery. No active cancer. No previous DVT. No plaster cast.
  • PE screen: No chest pain, no shortness of breath, no haemoptysis, no dizziness.
  • Medications: Amlodipine for blood pressure. No OCP/HRT. No anticoagulants. No allergies.
  • Family history: Father had a "blood clot in his leg" at age 48.
  • PMH: Hypertension. No malignancy. Non-smoker. Moderate alcohol.
🔔 Examiner Cues ▼
  • If candidate hasn't asked about PE symptoms by 4 minutes: "Is there anything about this condition you'd want to screen for urgently?"
  • If candidate hasn't asked family history: "Are there any other risk factors in his personal or family history relevant to clotting?"
  • At 7 minutes: "What is his Wells score, and what investigation do you request next?"
CriterionMarks
Swelling History
Onset, duration, progression, character of swelling elicited2
Warmth, erythema, tenderness along deep venous distribution asked1
Wells DVT Score
Immobility — long-haul flight identified and scored1
Active cancer, recent surgery, previous DVT, plaster cast all screened2
Calf swelling >3cm differential, entire leg swelling, collateral veins asked1
Correct Wells score calculated — 4 (DVT likely). States USS required, not D-dimer first.2
Risk Factors
Medications — OCP, HRT, anticoagulants asked1
Family history of VTE or thrombophilia asked — positive family history identified2
PE Screening
PE symptoms screened — chest pain, dyspnoea, haemoptysis2
Differentials and Communication
Differentials considered — cellulitis, ruptured Baker's cyst, muscular tear1
Systematic, structured history. Explains to patient what next steps involve.2
Total20
📋
Seizure History — First Fit
History · 8 minStation 2 of 10
8:00
Station type
History Taking
Time allowed
8 minutes
Pass mark
12 / 20
📄 Candidate Briefing
👁 Examiner Instructions
✅ Mark Scheme

📄 Candidate Instructions

You are the ED doctor. Miss Amara Osei, 24 years old, was brought in by ambulance after collapsing in a supermarket. A bystander witnessed a generalised tonic-clonic event lasting approximately 2 minutes. She has no prior history of seizures.

She is now alert, GCS 15, mildly confused. Obs: HR 96, BP 118/72, RR 16, SpO₂ 99%, BM 5.2 mmol/L, Temp 37.0°C.

Please take a focused history from Miss Osei and a brief collateral history from the witness (the examiner will role-play both). You have 8 minutes.

💡 Key areas — Pre-ictal, Ictal, Post-ictal, Differentials ▼
  • Pre-ictal (aura / warning): Any warning before the collapse — funny smell, déjà vu, rising epigastric sensation (temporal lobe), visual aura (occipital), jerking of one limb (Jacksonian march), pallor/dizziness (suggests syncope rather than seizure).
  • Ictal features (from witness): Duration, onset (focal vs generalised), tonic phase (stiffening), clonic phase (rhythmic jerking), eye deviation (away from focal cortex), head deviation, automatisms, incontinence (urinary — suggestive of seizure), tongue biting (lateral = seizure; tip = syncope/pseudoseizure), colour (cyanosis vs pallor), loss of consciousness.
  • Post-ictal phase: Duration of confusion, headache (Todd's paresis — focal limb weakness post-seizure suggests focal onset), nausea/vomiting, muscle aches (lactic acidosis from sustained clonic activity), sleep.
  • Differentials for collapse/LOC: Syncope (vasovagal — prodrome, brief LOC, rapid recovery, no post-ictal confusion), cardiac arrhythmia (no warning, any posture), hypoglycaemia (BM confirmed normal here), pseudoseizure/dissociative seizure (NEAD — prolonged, eyes closed, pelvic thrusting, no incontinence, no post-ictal confusion, normal EEG during event), TIA (no LOC usually).
  • Precipitants: Sleep deprivation, alcohol (excess or withdrawal), drugs (cocaine, tramadol), flashing lights (photosensitive), fever, illness, fasting, stress. First seizure in a young woman — OCP can lower seizure threshold with some antiepileptics; also consider eclampsia if pregnant.
  • Threshold-lowering medications: Tramadol, bupropion, antipsychotics, antibiotics (ciprofloxacin, metronidazole, imipenem), theophylline, antidepressants (TCAs). Always ask current medications.
  • Social implications: DVLA — must not drive and must inform DVLA after a first unprovoked seizure. Minimum 6 months seizure-free before driving. Advise regarding work (avoid working at heights, operating machinery), swimming alone, bathing (shower instead). Document that advice was given.

⚠️ Examiner / Role-player Instructions — Not for Candidate

Play both roles sequentially: (1) Amara Osei — post-ictal, mildly confused, cannot recall the event itself, remembers a brief "funny smell" warning. (2) Witness — the bystander who saw the event. No previous seizures, no significant PMH, no medications. The diagnosis is a first unprovoked generalised tonic-clonic seizure.

🎭 Patient and Witness Script ▼
  • Amara (patient): "I just remember smelling something strange — like burning rubber — and then I woke up on the floor with people around me. My head is throbbing and my tongue really hurts." Cannot remember the collapse itself. Mild confusion — keeps asking what happened. No prior seizures. No medications. No drug use. Had poor sleep past 2 nights due to exams. Drinks alcohol socially, nothing unusual recently. Not pregnant. OCP — Microgynon 30.
  • Witness (bystander): "She suddenly went stiff — her whole body. Her eyes rolled back and to the right. Then she started shaking — all four limbs, rhythmically, for about 2 minutes. She went a bit blue around the lips. She was incontinent of urine. Bit her tongue on the left side. She didn't respond at all during it. After it stopped she was totally out of it for about 5 minutes then started coming round."
  • Key positives: Olfactory aura (temporal lobe), lateral tongue biting, urinary incontinence, post-ictal confusion, cyanosis during ictus, witnessed GTCS. Sleep deprivation as potential precipitant.
🔔 Examiner Cues ▼
  • If candidate hasn't obtained collateral history by 4 minutes: "Would you like to speak to the witness as well?"
  • If candidate doesn't ask about driving: At 7 minutes — "What specific advice do you need to give Miss Osei before discharge?"
  • If candidate diagnoses syncope: Challenge — "The witness describes lateral tongue biting and 2 minutes of rhythmic jerking — does that change your differential?"
CriterionMarks
Pre-ictal
Aura elicited from patient — olfactory aura (burning smell) identified2
Ictal (Collateral History)
Collateral history actively sought from witness1
Duration, tonic and clonic phases, eye deviation elicited2
Urinary incontinence and lateral tongue biting confirmed — key seizure features2
Cyanosis during event noted — distinguishes from pseudoseizure1
Post-ictal
Post-ictal confusion duration, headache, Todd's paresis screened1
Differentials and Precipitants
Key differentials considered — syncope, hypoglycaemia (BM checked), pseudoseizure1
Precipitants screened — sleep deprivation, alcohol, drugs, threshold-lowering medications2
Social Implications
DVLA advice given — must not drive, must inform DVLA, 6 months seizure-free minimum2
Work and safety advice — avoid heights, machinery, swimming alone, baths1
Documents that DVLA advice was given1
Empathic, clear communication throughout — addresses patient's concern and confusion1
Total20
🩺 Clinical Examination
🩺
Hip Examination — Paediatric (Perthes / SUFE)
Examination · 8 minStation 3 of 10
8:00
Station type
Examination
Time allowed
8 minutes
Pass mark
12 / 20
📄 Candidate Briefing
👁 Examiner Instructions
✅ Mark Scheme

📄 Candidate Instructions

A 12-year-old boy is referred to ED by his GP with a 3-week history of left hip and groin pain and a limp. He is overweight. He has been playing less sport recently. He is otherwise well with no fever.

Please perform a focused hip examination. The examiner will provide findings. Present your diagnosis and management plan.

🔑 Paediatric Hip Examination — Structured Approach ▼
  • Observation (standing and walking): Antalgic gait (short stance phase on painful side), Trendelenburg gait (pelvis drops to unaffected side during stance — weak abductors or painful hip). Note body habitus — obesity is a risk factor for SUFE.
  • Trendelenburg test: Patient stands on one leg. Positive = contralateral pelvis drops (weak ipsilateral gluteus medius, painful hip, hip dislocation). In SUFE — often positive on affected side.
  • Leg length: True leg length — ASIS to medial malleolus (bone asymmetry). Apparent leg length — umbilicus to medial malleolus (pelvic tilt/adduction contracture). Compare sides.
  • Range of movement (supine): Flexion (normal 120°), extension (Thomas test — fixed flexion deformity), abduction (normal 45°), adduction (normal 30°), internal rotation (normal 45° — reduced in SUFE — pathognomonic), external rotation (normal 45° — often increased in SUFE), and Drehmann sign (obligatory external rotation on hip flexion = SUFE).
  • Thomas test: Patient supine, flex contralateral hip fully (flattens lumbar lordosis). Affected hip rises from couch = fixed flexion deformity.
  • Special signs in SUFE: Drehmann sign — on passive flexion of the hip, the thigh obligatorily externally rotates (specific for SUFE). Restricted internal rotation in all positions. Pain at end of range.
  • Perthes vs SUFE: Perthes — age 4–10, usually slim build, avascular necrosis of femoral head, restricted all movements especially abduction and internal rotation. SUFE (Slipped Upper Femoral Epiphysis) — age 10–15, obese male, restricted internal rotation especially, Drehmann sign, may be bilateral (20–40%).
  • Neurovascular: Distal pulses (femoral, popliteal, DP, PT), sensation, capillary refill. Important to document pre- and post-manipulation if applicable.
  • XR: AP and frog-leg lateral pelvis. SUFE — widening of physis, Klein's line (line along superior femoral neck should intersect femoral head — in SUFE it does not). Perthes — fragmented, sclerotic, then flattened femoral head.

⚠️ Examiner Instructions — Not for Candidate

Findings represent left SUFE (Slipped Upper Femoral Epiphysis). Feed findings as candidate examines. If candidate diagnoses Perthes, ask: "This boy is 12 and obese — does that change your differential?" If candidate does not check for bilateral involvement, prompt: "Is there anything about the other hip you'd want to check?"

📋 Findings to Feed ▼
  • Gait: Antalgic with Trendelenburg component on the left. Left leg held in slight external rotation at rest.
  • Trendelenburg test: Positive on left — pelvis drops to right when standing on left leg.
  • Leg length: True and apparent leg lengths equal bilaterally.
  • ROM left hip: Flexion restricted — 90° (normal 120°). Internal rotation grossly restricted — 5° (normal 45°). Drehmann sign positive — on passive flexion, thigh obligatorily externally rotates. External rotation preserved at 60°. Abduction reduced to 25°.
  • ROM right hip: Full and pain-free in all directions.
  • Thomas test: Left — 15° fixed flexion deformity. Right — normal.
  • Neurovascular: Intact bilaterally. DP and PT pulses present, normal sensation, CRT <2 sec.
  • XR findings (if asked): AP pelvis shows widened left proximal physis. Frog-leg lateral confirms posterior and inferior slip of femoral epiphysis. Klein's line does not intersect the left femoral head.
CriterionMarks
Observation and Gait
Gait assessed — antalgic and Trendelenburg gait identified on left2
Notes left leg held in external rotation at rest1
Specific Tests
Trendelenburg test performed correctly — positive left2
True and apparent leg lengths measured bilaterally1
Range of Movement
Internal and external rotation assessed — restricted internal rotation left identified2
Drehmann sign tested — positive (obligatory external rotation on flexion)2
Thomas test performed — fixed flexion deformity left noted1
Neurovascular and Imaging
Distal neurovascular status checked — pulses, sensation, CRT1
AP pelvis and frog-leg lateral XR requested — Klein's line interpretation stated2
Diagnosis and Management
Correct diagnosis — SUFE. Differentiates from Perthes using age, body habitus, Drehmann sign.2
Management — non-weight-bearing, urgent orthopaedic referral (same day), surgical fixation (in situ screw), check right hip (bilateral in 20–40%)1
States SUFE is a surgical emergency — weight-bearing risks further slip and AVN1
Total20
🩺
Shoulder Examination — Rotator Cuff Injury
Examination · 8 minStation 4 of 10
8:00
Station type
Examination
Time allowed
8 minutes
Pass mark
12 / 20
📄 Candidate Briefing
👁 Examiner Instructions
✅ Mark Scheme

📄 Candidate Instructions

A 45-year-old male painter and decorator presents with a 6-week history of right shoulder pain, worse on overhead activity, and difficulty reaching behind his back. No acute trauma. No neck symptoms.

Please perform a focused right shoulder examination. The examiner will provide findings as you examine. Present your diagnosis and management plan.

🔑 Shoulder Examination — Look, Feel, Move, Special Tests ▼
  • Look: From front, side and behind. Muscle wasting — supraspinatus (above spine of scapula), infraspinatus (below spine of scapula), deltoid. Deformity — AC joint prominence (ACJ OA/disruption), step deformity (ACJ grade III). Skin changes, scars, swelling.
  • Feel: Temperature. ACJ — tender (ACJ pathology). Bicipital groove (anterior, elbow at 90° with forearm supinated — biceps tendinopathy). Greater tuberosity — supraspinatus/infraspinatus insertion. Subacromial space. Posterior joint line.
  • Move (active then passive): Abduction (normal 0–180°, feel for painful arc 60–120° = supraspinatus impingement), forward flexion (0–180°), external rotation (normal 60–90°), internal rotation (hand behind back — thumb to T-level), cross-body adduction (ACJ).
  • Impingement tests: Hawkins-Kennedy — flex shoulder and elbow 90°, internally rotate (impinges supraspinatus under coracoacromial ligament). Neer's sign — passively flex arm with elbow extended (impinges supraspinatus under acromion). Positive if pain reproduced.
  • Rotator cuff specific tests: Empty can (Jobe) — arm at 90° abduction, 30° forward flexion (scapular plane), thumb pointing down (internal rotation), resist downward force = supraspinatus. Lift-off (Gerber) — hand behind lower back, lift away from spine against resistance = subscapularis. External rotation resistance — elbow at side, 90° flexion, resist external rotation = infraspinatus/teres minor. Drop arm test — passively abduct to 90°, patient slowly lowers — sudden drop = full-thickness tear.
  • Biceps: Speed's test — elbow extended, forearm supinated, flex at shoulder against resistance = biceps tendinopathy (pain at bicipital groove).
  • Cervical spine: Screen — neck movements, Spurling's test (axial compression with lateral flexion) — to exclude referred pain from cervical radiculopathy (C5/C6).
  • Neurovascular: Axillary nerve (regimental badge area — lateral deltoid), distal pulses.

⚠️ Examiner Instructions — Not for Candidate

Findings represent supraspinatus impingement syndrome with probable partial-thickness tear. Feed findings progressively. If candidate does not screen the cervical spine, prompt: "Is there anything else you'd want to exclude as a cause of shoulder pain?" If candidate omits neurovascular assessment, prompt at the end.

📋 Findings to Feed ▼
  • Look: Mild supraspinatus wasting right (compared to left). No deltoid wasting. No deformity. No ACJ prominence.
  • Feel: Tender over right subacromial space and greater tuberosity. Bicipital groove — mild tenderness. ACJ non-tender.
  • Move: Active abduction — painful arc 70–110° (pain then resolves above 110°). Full passive abduction 180° (pain in arc range). Forward flexion restricted to 150° actively. External rotation 50° (mildly reduced). Internal rotation — thumb to L4 (reduced — normally to T6).
  • Hawkins-Kennedy: Positive — pain reproduced on internal rotation.
  • Neer's sign: Positive.
  • Empty can: Positive — weakness and pain on resisted abduction in scapular plane.
  • Lift-off: Negative — subscapularis intact.
  • External rotation resistance: Mild weakness right — infraspinatus mildly involved.
  • Drop arm test: Negative — no full-thickness tear.
  • Speed's test: Positive — bicipital groove pain on resisted forward flexion.
  • Cervical spine: Full, pain-free ROM. Spurling's negative.
  • Neurovascular: Axillary nerve sensation intact over regimental badge area. Pulses present.
CriterionMarks
Look
Inspects from front, side and behind — supraspinatus wasting and no deformity noted1
Feel
Systematic palpation — ACJ, bicipital groove, greater tuberosity, subacromial space2
Move
Active and passive ROM assessed — painful arc 70–110° identified on active abduction2
States painful arc significance — supraspinatus impingement in subacromial space1
Special Tests
Hawkins-Kennedy performed correctly — positive2
Empty can (Jobe) performed correctly — positive (supraspinatus)2
Lift-off test performed — negative (subscapularis intact)1
Drop arm test performed — negative (no full-thickness tear)1
Cervical Spine and Neurovascular
Cervical spine screened — Spurling's negative, referred pain excluded1
Axillary nerve sensation (regimental badge area) checked1
Diagnosis and Management
Correct diagnosis — supraspinatus impingement with probable partial tear. Biceps tendinopathy also present.2
Management — analgesia (NSAIDs), physiotherapy, subacromial steroid injection, USS/MRI shoulder, orthopaedic/MSK referral if fails conservative1
Occupational advice — occupational health referral, modified duties while recovering1
Total20
🔧 Practical Procedures
🔧
Knee Aspiration — Hot Swollen Knee
Procedure · 8 minStation 5 of 10
8:00
Station type
Procedure
Time allowed
8 minutes
Pass mark
12 / 20
📄 Candidate Briefing
👁 Examiner Instructions
✅ Mark Scheme

📄 Candidate Instructions

A 65-year-old man presents with an acutely hot, swollen, painful right knee. He is unable to weight-bear. He has a history of gout but this feels different to him — he has a fever of 38.6°C.

Obs: HR 102, BP 128/78, Temp 38.6°C, WBC 18.4 × 10⁹/L, CRP 186 mg/L.

Please talk through how you would perform a knee joint aspiration, including your indications, technique, and what you would do with the aspirated fluid. You have 8 minutes.

📝 Knee Aspiration — Technique and Fluid Analysis ▼
  • Indications: Diagnostic (septic arthritis, crystal arthropathy, haemarthrosis, unexplained effusion), therapeutic (pain relief from tense effusion, instillation of steroid/local anaesthetic).
  • Contraindications: Overlying skin infection/cellulitis (absolute — risk of seeding joint), prosthetic joint (orthopaedic team should aspirate under theatre conditions), bleeding diathesis (relative — correct coagulopathy first), no effusion demonstrable (relative).
  • Positioning and landmarks: Patient supine, knee extended. Superolateral approach (most commonly used in knee): 1 cm above and 1 cm lateral to the superior pole of the patella. Needle directed slightly inferiorly and medially into the joint space beneath the patella. OR medial approach: medial border of patella at mid-point, directed horizontally.
  • Equipment: Chlorhexidine skin prep, sterile drape, 21G green needle, 10–20 ml syringe (large enough for full drainage), specimen pots (sterile for MC&S, plain for biochemistry/crystals), local anaesthetic (1% lidocaine — optional for skin), sterile dressing.
  • Aseptic technique: Clean hands, sterile gloves, full ANTT (aseptic non-touch technique). No-touch of needle tip.
  • Fluid analysis: MC&S (septic arthritis — white and turbid, WBC >50,000 cells/μL predominantly neutrophils, organisms on Gram stain/culture). Crystal microscopy (gout — negatively birefringent needle-shaped urate crystals; pseudogout — positively birefringent rhomboid calcium pyrophosphate crystals). Glucose and LDH (low glucose, high LDH = infection/inflammatory). Appearance (blood-stained = haemarthrosis; viscous yellow/green = septic; straw coloured = gout/OA).
  • Septic arthritis management: Aspiration must not delay antibiotics (if diagnosis likely — flucloxacillin IV, or vancomycin if MRSA risk). Orthopaedic referral for joint washout. Do NOT inject steroid if septic arthritis suspected.
  • Complications: Infection (iatrogenic septic arthritis — rare with ANTT), haemarthrosis, skin bruising, vasovagal, failure to aspirate (dry tap — try repositioning).

⚠️ Examiner Instructions — Not for Candidate

Ask: "The aspirated fluid is thick, yellow-white and turbid — what does this suggest and what is your immediate next step?" (Expected: highly suspicious of septic arthritis — send MC&S immediately, start IV antibiotics without waiting for result, urgent orthopaedic referral for washout.) Also ask: "Would you inject corticosteroid into this joint?" (Expected: No — absolute contraindication if septic arthritis suspected.)

CriterionMarks
Indications and Contraindications
Indications stated — diagnostic (septic arthritis vs gout) and therapeutic1
Overlying infection as absolute contraindication — specifically asks about skin before proceeding2
Prosthetic joint — orthopaedic team required, not routine ED aspiration1
Technique
Correct landmark — superolateral approach (1cm above and lateral to superior patella pole)2
Full aseptic technique — chlorhexidine prep, sterile gloves, ANTT, no-touch of needle2
Appropriate equipment selected — 21G needle, adequate syringe, specimen pots1
Fluid Analysis
MC&S (sterile pot), crystal microscopy, glucose and LDH — all three investigations named2
Interprets turbid yellow-white fluid correctly — suspicion for septic arthritis2
Correctly refuses steroid injection if septic arthritis suspected2
Management and Complications
Aspiration does not delay antibiotics — states start IV flucloxacillin/vancomycin immediately2
Complications named — iatrogenic infection, haemarthrosis, vasovagal1
Orthopaedic referral for washout stated1
Total20
🔧
Splinting — Colles Fracture Backslab POP
Procedure · 8 minStation 6 of 10
8:00
Station type
Procedure
Time allowed
8 minutes
Pass mark
12 / 20
📄 Candidate Briefing
👁 Examiner Instructions
✅ Mark Scheme

📄 Candidate Instructions

A 70-year-old woman presents after a fall onto her outstretched right hand (FOOSH). XR confirms an undisplaced distal radius fracture (Colles type). Neurovascular status is intact. Hock plastered orthopaedic team have reviewed and request you apply a dorsal backslab plaster of Paris for temporary immobilisation.

Please talk through the procedure and demonstrate on the manikin arm. You have 8 minutes.

📝 Backslab POP — Technique, Position, Patient Instructions ▼
  • Backslab vs full cast: Backslab preferred acutely — allows for swelling (full cast risks compartment syndrome in first 24–48 hours). Full cast once swelling subsides (typically 5–7 days). Backslab leaves the volar surface open.
  • Position: Dorsal backslab — wrist in approximately 10° of dorsiflexion (slight extension) and 5–10° of ulnar deviation. This is the position of function and counters the typical Colles deformity (dorsal angulation, radial deviation — "dinner fork" deformity). Elbow at 90° for application.
  • Materials (in order): 1. Stockinette — applied first from mid-forearm to metacarpal heads (thumb left free). 2. Orthopaedic wool/Softcast — padded layer, extra padding over bony prominences (radial styloid, ulnar styloid). 3. Plaster of Paris slabs — 6–8 layers, wet plaster, applied dorsally from MCPJs to just below elbow. 4. Wet bandage to mould and secure. 5. Fold over stockinette ends. 6. Crepe bandage to finish. 7. Sling.
  • Neurovascular check before AND after: Radial pulse, capillary refill, sensation (median nerve — first 3 digits; radial nerve — first web space; ulnar nerve — little finger), finger movement. Median nerve at risk in Colles fracture (acute carpal tunnel). Document findings both pre- and post-application.
  • Patient instructions (written and verbal): Elevate hand above heart for first 48 hours. Move fingers regularly. Warning signs for urgent return — numbness, tingling, colour change (blue/white), inability to move fingers, tight or painful cast, increasing pain. No weight-bearing on the limb.
  • Fracture clinic: Refer to fracture clinic within 1–5 days (depending on local protocol). Orthopaedic follow-up for definitive management decision (conservative vs manipulation under anaesthetic vs surgical fixation with volar plate).

⚠️ Examiner Instructions — Not for Candidate

Ask: "24 hours later the patient returns with severe pain, her fingers are swollen and she cannot move them — what do you suspect?" (Expected: Cast too tight / compartment syndrome — bivalve the cast immediately, elevate, reassess neurovascular status, urgent orthopaedic review.) Also ask: "Why backslab rather than full cast acutely?" (Expected: allows for post-injury swelling, prevents compartment syndrome.)

CriterionMarks
Pre-procedure
Neurovascular status checked before application — radial pulse, sensation, CRT, finger movement2
Correctly chooses backslab over full cast — explains swelling risk1
Position
Correct wrist position — 10° dorsiflexion and 5–10° ulnar deviation stated and demonstrated2
Explains rationale — counters Colles deformity (dorsal angulation, radial deviation)1
Application Technique
Correct order — stockinette, wool/padding (with extra over bony prominences), POP slabs, bandage3
Dorsal application — MCPJs to below elbow, thumb free, 6–8 POP layers1
Smooths and moulds plaster evenly — no ridges or pressure points created1
Post-procedure
Neurovascular status re-checked after application — documented2
Patient instructions given — elevation, finger movement, warning signs for urgent return2
Compartment syndrome scenario managed correctly — bivalve immediately2
Fracture clinic referral and definitive management plan stated1
Total20
💬 Communication
💬
Safeguarding — Domestic Violence Disclosure
Communication · 8 minStation 7 of 10
8:00
Station type
Communication
Time allowed
8 minutes
Pass mark
12 / 20
📄 Candidate Briefing
👁 Examiner Instructions
✅ Mark Scheme

📄 Candidate Instructions

You are the ED doctor. Mrs Sofia Andrade, 34 years old, attends with facial bruising and a split lip. She says she "walked into a door." You note the injuries are inconsistent with this mechanism. Her partner is in the waiting room.

During your consultation, seen alone, she discloses that her partner hits her. She asks you: "Please don't tell anyone — he'll know I talked."

Please respond to Mrs Andrade's disclosure and manage this situation. You have 8 minutes.

💡 Framework — DVA Response, DASH, MARAC ▼
  • Initial response — create safety: Thank her for telling you. Acknowledge her bravery. Ensure the consultation is private (partner must NOT be present — never use partner as interpreter for DVA history). Confirm confidentiality boundaries honestly — explain what you can and cannot keep confidential.
  • DASH risk assessment (Domestic Abuse, Stalking and Honour-based violence): Not a rigid questionnaire — use open questions. Key high-risk indicators: injury escalating in frequency/severity, threats to kill, weapon use, strangulation (highest mortality predictor), controlling behaviour, pregnancy (increased risk), children in household, partner's substance misuse, victim feels they will be killed.
  • Confidentiality and duty of care: You cannot guarantee complete confidentiality if there is a risk to life (patient's own or others — particularly children). Explain this clearly and honestly. If there are children in the home — Children's Services involvement may be required regardless of patient's wishes. GMC guidance — breach confidentiality if serious and imminent risk of harm and sharing is proportionate.
  • Safety planning: Does she want to leave? Is it safe to go home now? Is there a safe place she can go? Keep a bag packed (documents, medication, money). Code word with trusted person. National Domestic Violence Helpline: 0808 2000 247 (24/7, free). Safe spaces in pharmacy (Ask for ANI scheme).
  • IDVA referral: Independent Domestic Violence Advisor — specialist advocate. Offer referral — can provide legal, housing and support advice. Does not require patient to have left partner.
  • MARAC (Multi-Agency Risk Assessment Conference): Automatic referral threshold — DASH score high-risk (14+ standard indicators, or professional judgement of high risk). Multi-agency meeting (police, social care, health, housing). Clinician can refer without patient consent if high risk.
  • Documentation: Injuries documented with body map. Photographs with consent. Exact words patient used in quotes. Note inconsistency between injuries and mechanism given. Document actions taken. Do NOT write sensitive details where partner/others could see (e.g. front sheet of notes).
  • Do NOT: Confront the partner. Promise complete confidentiality. Try to persuade her to leave (increases danger). Minimise or normalise abuse.

⚠️ Examiner / Role-player Instructions — Not for Candidate

You are Mrs Sofia Andrade. You are frightened but willing to talk if the candidate is kind and non-judgemental. You have two young children at home (aged 4 and 7). Your partner has threatened you with a knife on one occasion. You are not ready to leave him but want to know your options. Escalate distress if candidate is dismissive or promises complete confidentiality.

🎭 Patient Script ▼
  • Opening (after disclosure): "Please don't tell anyone — if he finds out I've said something, it'll be so much worse. I just need to get patched up and go home."
  • If asked about frequency/severity: "It's been getting worse over the last year. Used to be just shouting. Now..." (pauses). "Last month he held a knife to my throat. I was so scared."
  • Children: If asked — "I have two kids, 4 and 7. They were in the other room. They didn't see it."
  • Safety at home: "I don't know what to do. I have nowhere to go. He has all the money. I don't want to ruin the family."
  • If IDVA/helpline offered: Softens — "I didn't know there was someone like that I could talk to. Maybe."
  • If confidentiality addressed honestly: Accepts — "I understand... I just don't want him to know I said anything today."
🔔 Examiner Cues ▼
  • If candidate promises complete confidentiality: "Is that the right thing to say given the children and knife threat?"
  • If candidate doesn't ask about children: "Are there children in the household?" (prompt to explore safeguarding dimension)
  • At 7 minutes: "Mrs Andrade is about to leave — what are the three most important things you ensure happen before she goes?"
CriterionMarks
Initial Response
Validates disclosure — thanks patient, acknowledges bravery, does not minimise2
Ensures privacy — confirms partner is not present, offers interpreter if needed1
Risk Assessment
DASH high-risk indicators asked — escalating violence, weapon use (knife threat identified)2
Children in household asked — safeguarding dimension identified2
Confidentiality
Explains confidentiality honestly — cannot promise complete confidentiality if risk to life or children2
Does NOT promise complete confidentiality — would be incorrect and dangerous1
Safety Planning and Referral
Safety planning offered — safe place, emergency bag, trusted contact, code word2
National DVA helpline number provided (0808 2000 247)1
IDVA referral offered and explained1
MARAC threshold identified — knife threat + escalation = high risk, referral appropriate1
Documentation
Documents injuries accurately with body map, photographs with consent, patient's exact words in quotes, inconsistency noted2
Non-confrontational, empathic, non-judgemental throughout. Does not pressure to leave.1
Total20
💬
Suicide Risk Assessment and Safety Planning
Communication · 8 minStation 8 of 10
8:00
Station type
Communication
Time allowed
8 minutes
Pass mark
12 / 20
📄 Candidate Briefing
👁 Examiner Instructions
✅ Mark Scheme

📄 Candidate Instructions

You are the ED doctor. Mr Thomas Reilly, 29 years old, has been brought to ED by a friend after posting concerning messages on social media suggesting he did not want to be alive. He is alert and cooperative. He denies any overdose or self-harm today.

He is not acutely psychotic. He has a background of depression. He is not currently under CMHT but is on sertraline prescribed by his GP.

Please conduct a structured suicide risk assessment and develop a safety plan with Mr Reilly. You have 8 minutes.

💡 Framework — Columbia Protocol, Safety Planning ▼
  • Approach: Introduce yourself, establish rapport before asking directly about suicidality. Normalise — "Sometimes when people feel this way they have thoughts of not wanting to be here — is that something you've been experiencing?"
  • Columbia Suicide Severity Rating Scale (C-SSRS) — Ideation: 1. Passive ideation — "I wish I were dead." 2. Active ideation without plan — "I want to kill myself." 3. Active ideation with plan. 4. Active ideation with intent. 5. Active ideation with intent and specific plan.
  • History of attempts: Previous suicide attempts (number, method, lethality, medical attention required, intent at time). Prior psychiatric admissions. Previous self-harm (non-suicidal).
  • Precipitants and context: What triggered the posts today — recent losses (relationship, job, bereavement), financial stress, isolation, substance misuse, anniversary reactions.
  • Protective factors: Reasons for living — family, children, pets, religious beliefs, future plans, hope for change. Ambivalence is protective. Social support.
  • Means restriction: Access to lethal means — medications at home (stockpiling), weapons, alcohol. If high risk — ask trusted person to remove/secure medications. This is a critical and evidence-based intervention.
  • Safety planning (Stanley-Brown model): 1. Warning signs I notice before a crisis. 2. Internal coping strategies (distraction, grounding — name 5 things you can see). 3. Social contacts who can distract. 4. People to contact for support (named). 5. Professionals/crisis lines (Crisis line 116 123 Samaritans; local CRHT number). 6. Making the environment safer — remove means. Written plan given to patient.
  • Disposition: Low risk — safety plan, GP letter, crisis line, CMHT referral. Intermediate — CRHT (Crisis Resolution Home Treatment) assessment. High risk — psychiatric admission (voluntary vs MHA 1983 s.2 assessment if refusing and criteria met).

⚠️ Examiner / Role-player Instructions — Not for Candidate

You are Mr Thomas Reilly. You are quiet and withdrawn but cooperative. You have passive ideation — "I just don't see the point any more... I don't want to be here." But no active plan or intent today — "I wouldn't actually do anything." Recent relationship breakdown 2 weeks ago. One previous overdose at age 22 (paracetamol, minor). Has a full bottle of sertraline at home. No alcohol today. Ambivalent about the future — mentions his dog as something that keeps him going.

🎭 Patient Script ▼
  • Ideation: "I just keep thinking... what's the point? Everything feels hopeless." If asked directly about plans: "No... I don't have a plan. I wouldn't actually do it. I just... wanted someone to notice."
  • Precipitant: Partner of 4 years left him 2 weeks ago. Lost his job last month. "It all fell apart at the same time."
  • Previous attempt: "I took some paracetamol when I was 22 — after my mum died. They pumped my stomach. I wasn't trying to die, I just wanted it to stop."
  • Medications at home: "I've got a nearly full bottle of sertraline on my bedside table... about 60 tablets."
  • Protective factors: "My dog, Biscuit — I'd never leave him." Younger sister who lives nearby. "She doesn't know how bad it's got."
  • Safety plan: Responds positively if candidate involves him in building it — "I hadn't thought about calling the Samaritans. I could do that."
🔔 Examiner Cues ▼
  • If candidate uses jargon (Columbia, C-SSRS) without explaining: "Mr Reilly looks confused — is your language accessible?"
  • If candidate doesn't ask about means at home: "Is there anything in his environment that increases risk?"
  • At 7 minutes: "Mr Reilly asks what happens next — is he going to be admitted?"
CriterionMarks
Rapport and Approach
Introduces self, establishes rapport before asking about suicidality — non-judgemental and warm1
Asks directly but sensitively about ideation — does not avoid the topic1
Risk Assessment
Ideation characterised correctly — passive (no active plan or intent) identified2
Previous attempt elicited — paracetamol overdose age 22, method and lethality explored2
Precipitants identified — relationship breakdown, job loss1
Protective factors identified — dog, sister, ambivalence2
Means Restriction
Access to means asked — full sertraline bottle at home identified2
Means restriction arranged — asks patient/sister to remove or secure medication2
Safety Planning
Collaborative safety plan developed with patient — warning signs, coping strategies, support contacts, crisis line2
Samaritans (116 123) or equivalent crisis line provided1
Disposition
Appropriate disposition — CRHT assessment, CMHT urgent referral, GP letter. Explains to patient clearly.2
Does not discharge without safety plan, crisis contact and follow-up arranged1
Empathic, non-judgemental and collaborative throughout1
Total20
📊 Data Interpretation
📊
X-Ray Interpretation — Fracture Recognition
Data · 8 minStation 9 of 10
8:00
Station type
Data Interpretation
Time allowed
8 minutes
Pass mark
12 / 20
📄 Candidate Briefing
👁 Examiner Instructions
✅ Mark Scheme

📄 Candidate Instructions

The examiner will read you descriptions of three X-rays in sequence. For each one, give a systematic interpretation using ABCS, state your diagnosis, and describe immediate management and key pitfalls. You have 8 minutes for all three.

💡 ABCS Approach and Key Facts for Each Fracture ▼
  • ABCS systematic approach: A = Adequacy/Alignment. B = Bone (cortex, trabecular pattern, fracture lines). C = Cartilage/joints (joint space, effusion). S = Soft tissue (swelling, gas, foreign body).
  • XR 1 — Colles fracture: Distal radius fracture within 2–3cm of articular surface. Classic XR features — dorsal angulation of distal fragment, radial shortening, radial deviation, volar tilt of articular surface reversed (normal = 11–12° volar). "Dinner fork" deformity on lateral view. May have associated ulnar styloid fracture. Management — backslab POP in 10° dorsiflexion/ulnar deviation, orthopaedic review. Complications — median nerve injury (acute carpal tunnel), malunion, EPL tendon rupture, DRUJ disruption.
  • XR 2 — Scaphoid fracture: Often subtle — 10–20% of scaphoid fractures are radiographically occult on initial XR. Lucency at waist of scaphoid (most common site, highest risk of AVN). Other sites — proximal pole (highest AVN risk), distal pole, tubercle. Mechanism — FOOSH, young adult. Management — if clinical suspicion but normal XR: treat as scaphoid fracture (thumb scaphoid cast), repeat XR at 10–14 days, or early MRI/CT (gold standard). Do NOT dismiss. Complication of missed diagnosis — avascular necrosis of proximal fragment (blood supply enters distally — retrograde). Non-union — osteoarthritis.
  • XR 3 — Toddler's fracture: Spiral or oblique tibial fracture in a child typically aged 9 months to 3 years. Mechanism — minor rotational force (twisting while falling, jumping from low height). XR often subtle — thin oblique lucency in distal tibial shaft, may be invisible on initial XR. Two views minimum. NAI consideration — spiral tibial fracture in an ambulatory child has a plausible mechanism. However, in a non-mobile infant, spiral long bone fracture = high concern for NAI. Key questions: Does the mechanism match the injury? Is the history consistent? Are there other injuries? Safeguarding referral if concern. Management — below-knee cast, non-weight-bearing, paediatric orthopedics.

⚠️ Examiner Instructions — Not for Candidate

Read the three XR descriptions below in sequence, pausing after each to allow candidate to respond. Time approximately 2.5 minutes per XR. After XR 2 (scaphoid), specifically ask: "The XR looks entirely normal to you — what do you do?" After XR 3 (Toddler's fracture), ask: "The parent's story is that the child tripped on a rug — is this mechanism consistent with the injury?"

📋 XR Descriptions to Read Aloud ▼
  • XR 1 — Wrist, AP and lateral: "PA wrist XR shows a transverse fracture of the distal radius approximately 2cm proximal to the articular surface. There is dorsal angulation of the distal fragment, radial shortening of 3mm, and an associated undisplaced ulnar styloid fracture. On the lateral view, volar tilt of the articular surface is reversed — dorsal tilt of 15°."
  • XR 2 — Wrist, scaphoid series: "Scaphoid series XR. The patient is a 22-year-old male who fell off his bicycle onto his outstretched hand. He has anatomical snuffbox tenderness. All four views appear normal to you — there is no definite fracture line visible."
  • XR 3 — Tibia/fibula, paediatric: "AP and lateral tibia/fibula in an 18-month-old boy brought in by his mother. She says he was running in the garden and suddenly started crying and refused to weight-bear. On careful inspection there is a subtle oblique lucency in the distal tibial shaft. The fibula appears intact."
CriterionMarks
XR 1 — Colles Fracture
Systematic ABCS approach stated before describing findings1
Distal radius fracture, dorsal angulation, ulnar styloid fracture — all identified2
Management — backslab, orthopaedic review. Median nerve complication named.1
XR 2 — Scaphoid Fracture
Normal XR with clinical suspicion — does NOT discharge. States treat as scaphoid fracture.2
Early MRI or CT recommended as gold standard / repeat XR at 10–14 days acceptable1
AVN of proximal fragment as consequence of missed diagnosis — explains blood supply2
Thumb spica / scaphoid cast applied and orthopaedic review arranged1
XR 3 — Toddler's Fracture and NAI
Identifies subtle spiral tibial fracture — Toddler's fracture in ambulatory child2
Mechanism assessment — trip on rug at 18 months is plausible for ambulatory toddler. Mechanism consistent.1
NAI consideration raised — spiral tibial fracture in non-ambulant infant = high concern. Here — 18 months, ambulatory = lower concern but still document.2
Management — below-knee cast, non-weight-bearing, paediatric orthopedics, safeguarding documented2
States key principle — if history inconsistent with injury, escalate safeguarding regardless1
Total20
📊
Paediatric Data Interpretation — Child DKA
Data · 8 minStation 10 of 10
8:00
Station type
Data Interpretation
Time allowed
8 minutes
Pass mark
12 / 20
📄 Candidate Briefing
👁 Examiner Instructions
✅ Mark Scheme

📄 Candidate Instructions

An 8-year-old girl with known Type 1 diabetes is brought in by her parents. She has been vomiting for 12 hours, has abdominal pain, and is increasingly drowsy. Weight is 28 kg.

Obs: HR 134, BP 88/54, RR 32 (Kussmaul), SpO₂ 97%, GCS 12 (E3V4M5), Temp 37.8°C.

Results: pH 7.11, HCO₃⁻ 7 mmol/L, glucose 24 mmol/L, ketones 4.8 mmol/L (blood), Na⁺ 131 mmol/L, K⁺ 4.1 mmol/L.

Please interpret these results and describe your management using the appropriate paediatric protocol. You have 8 minutes.

💡 BSPED Paediatric DKA Protocol — Critical Differences from Adult ▼
  • Severity classification (BSPED 2020): Mild — pH 7.2–7.29, HCO₃ 10–14.9. Moderate — pH 7.1–7.19, HCO₃ 5–9.9. Severe — pH <7.1, HCO₃ <5. This child — pH 7.11, HCO₃ 7 = moderate DKA. However, GCS 12 and haemodynamic instability makes this severe in clinical behaviour.
  • Fluid resuscitation (CRITICAL difference from adults): IV fluid bolus ONLY if shocked (HR elevated + poor perfusion + ↓BP): 10 ml/kg 0.9% saline over 10–15 minutes. Repeat if necessary (max 20–30 ml/kg total boluses). Do NOT give 2L up-front bolus as in adults — risk of cerebral oedema. Most children in DKA are not shocked — start deficit replacement without bolus. Deficit calculation — assume 5–10% dehydration based on clinical signs. Replace deficit + maintenance over 48 hours (NOT 24 hours as in adults). Solution — 0.9% NaCl with 5% glucose and 20 mmol/L KCl (add glucose when BG <14 mmol/L).
  • Insulin (CRITICAL difference from adults): Start insulin 0.05 units/kg/hr (NOT 0.1 units/kg/hr as in adult JBDS). Do NOT start insulin in the first hour — fluid resuscitation first. If pH <7.1 or HCO₃ <5 (severe) — insulin 0.05 units/kg/hr still. Rate may be increased to 0.1 units/kg/hr only if poor response. No insulin bolus.
  • Potassium: K⁺ 4.1 — normal/high initially (acidosis drives K⁺ out of cells). Do NOT give K⁺ if K⁺ >5.5 mmol/L and no urine output. As insulin is given, K⁺ drops — add KCl to fluids (20–40 mmol/L). Monitor ECG.
  • Cerebral oedema — THE most feared complication of paediatric DKA: Occurs in 0.5–1% but carries 20–25% mortality. Risk factors — younger age, new presentation, over-rapid fluid replacement, hypocapnia, hyponatraemia, bicarbonate administration (avoid NaHCO₃). Warning signs — headache, confusion, deteriorating GCS, bradycardia, hypertension, eye changes. Management — IMMEDIATE: hypertonic saline (2.7% NaCl 2.5 ml/kg) or mannitol 0.5–1 g/kg, restrict IVF to 50%, head up 30°, PICU, CT head to exclude other pathology.
  • PICU referral criteria: GCS <12 (this child qualifies), severe DKA (pH <7.1), cerebral oedema, age <2 years, haemodynamic instability unresponsive to fluids.
  • Monitoring: Hourly BM, 2-hourly blood gas (not pH alone), 4-hourly electrolytes. Target BG fall of 3–5 mmol/L/hr (not faster). Do not aim for normal BG rapidly — risk of cerebral oedema.

⚠️ Examiner Instructions — Not for Candidate

Ask: "A junior colleague suggests starting insulin at 0.1 units/kg/hr as they've read the adult DKA guideline — what do you say?" (Expected: paediatric DKA uses 0.05 units/kg/hr — BSPED protocol, NOT adult JBDS. 0.1 units/kg/hr risks hypoglycaemia and cerebral oedema.) Also ask: "30 minutes after starting treatment, the nurse tells you the child has developed a headache and her GCS has dropped to 10 — what do you do?" (Expected: cerebral oedema — hypertonic saline or mannitol immediately, restrict fluids, PICU, do not wait for CT.)

CriterionMarks
Data Interpretation
Correctly identifies DKA — hyperglycaemia + ketosis + acidosis (all three)2
Severity classified as moderate (pH 7.11, HCO₃ 7) per BSPED — but states clinical picture (GCS 12, haemodynamic instability) makes this severe in behaviour2
Correctly names BSPED paediatric protocol — NOT adult JBDS1
Fluid Management
Fluid bolus only if shocked — 10 ml/kg 0.9% saline — patient is haemodynamically compromised, states bolus appropriate here2
Deficit replacement over 48 hours (NOT 24 hours). Correct fluid used — 0.9% NaCl with glucose added when BG <14.2
Avoids large up-front fluid bolus — states risk of cerebral oedema1
Insulin
Insulin 0.05 units/kg/hr — specifically states NOT 0.1 units/kg/hr. Rejects junior's suggestion.2
Insulin started after initial fluid — not simultaneously or before1
Cerebral Oedema
Cerebral oedema identified from scenario — falling GCS + headache after treatment started2
Immediate treatment — hypertonic saline or mannitol. Restrict fluids. PICU call. Does not wait for CT.2
PICU and Monitoring
PICU referral criteria identified — GCS 12 qualifies. States referral required.1
Monitoring stated — hourly BM, 2-hourly gas, 4-hourly electrolytes, target BG fall 3–5 mmol/hr1
Potassium management — add KCl to fluids, monitor ECG, do not give if K⁺ >5.51
Total20