R
REVISEMRCEM
Reviews Free Resources OSCE Stations About
MRCEM Part C · OSCE Preparation

OSCE Station Bank 5

10 advanced stations covering psychiatric emergencies, major haemorrhage, burns, spinal injuries, renal emergencies and more — all new topics not covered in Banks 1–4.

0/ 10 completed
10Stations
5Domain types
8Min / station
0/10 completed
📋 History Taking
📋
Chest Pain — Aortic Dissection History
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 Victor Osei, 56 years old, presents with sudden onset severe chest pain that started 1 hour ago. He describes it as the worst pain he has ever felt.

Obs: BP Right arm 178/98, Left arm 142/86, HR 102, RR 20, SpO₂ 97%, Temp 37.0°C.

Please take a focused history from Mr Osei. You have 8 minutes.

💡 Key Areas — Dissection vs ACS ▼
  • Pain character: Tearing/ripping quality (highly specific for dissection), instantaneous maximum severity onset (vs crescendo ACS), radiation to back/interscapular (Type A — ascending; Type B — descending/back).
  • Dissection red flags: Pulse/BP differential between arms (>20mmHg), neurological deficit (carotid involvement), syncope, limb ischaemia, new aortic regurgitation murmur, Horner's syndrome.
  • Marfan's / connective tissue screen: Tall stature, long fingers (arachnodactyly), lens dislocation, family history of aortic aneurysm/dissection/sudden death, previous aortic surgery.
  • Risk factors: Hypertension (most common), bicuspid aortic valve, pregnancy (3rd trimester/postpartum), cocaine use, trauma, Turner's/Ehlers-Danlos syndrome.
  • Differentiate from ACS: Dissection — tearing, maximal at onset, radiates to back, BP differential, no ECG changes (unless coronary ostia involved). ACS — crushing, crescendo, ST changes.
  • Contraindications to thrombolysis: If dissection is misdiagnosed as STEMI and thrombolysed → catastrophic haemorrhage. Must exclude dissection before thrombolysis.

⚠️ Examiner / Role-player Instructions — Not for Candidate

You are Victor Osei, a known hypertensive on amlodipine. The diagnosis is Type A aortic dissection. Pain started instantaneously — "like someone ripped my chest apart." It radiates straight through to the back between the shoulder blades. He has never had pain like this before. He is a tall, long-fingered man (undiagnosed Marfan's).

🎭 Patient Script ▼
  • Pain: "It was instant — like a ripping, tearing feeling right in the middle of my chest." Radiates straight through to the back, between shoulder blades. 10/10. Not relieved by anything.
  • Associated: Brief near-syncope at onset. No vomiting. Mild breathlessness. No cough or haemoptysis.
  • Not crushing/pressure — specifically tearing/ripping character.
  • PMH: Hypertension for 10 years (amlodipine 10mg). No previous cardiac history. No diabetes. Father died suddenly aged 52 — "they said it was his heart" (possibly aortic dissection/aneurysm).
  • If asked about height/body type: "People always say I'm unusually tall and long-limbed."
  • No cocaine use. Non-smoker. Occasional alcohol.
CriterionMarks
Pain Characterisation
Tearing/ripping character specifically elicited — not crushing3
Instantaneous maximum onset established2
Radiation to back / interscapular region elicited2
Dissection-Specific Features
BP differential between arms noted / asked about (clinical finding noted in scenario)2
Syncope / near-syncope asked and elicited1
Neurological symptoms asked — limb weakness, facial droop, visual change1
Pulse deficit / limb ischaemia asked1
Connective Tissue / Risk Factors
Marfan's features asked — height, arm span, lens problems, family history2
Hypertension — established risk factor elicited1
Family history of aortic disease / sudden cardiac death elicited1
Cocaine use asked1
Clinical Reasoning
Correctly identifies aortic dissection as working diagnosis1
States must exclude dissection before considering thrombolysis1
Requests CT aortogram as investigation of choice1
Total20
📋
Psychiatric History — First Episode Psychosis
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. Mr Reuben Clarke, 22 years old, has been brought to the ED by his mother. She is concerned he has been acting strangely for the past 3 weeks — staying in his room, talking to himself, and saying people are watching him through the TV.

He is currently calm and cooperative. Obs are normal. GCS 15.

Please take a focused psychiatric history from Reuben. You have 8 minutes.

💡 Psychiatric History Framework ▼
  • Presenting complaint: Duration, onset, progression, triggers.
  • Psychotic symptoms:
    • Hallucinations — auditory (voices: number, content, 2nd vs 3rd person, commanding), visual, tactile, olfactory
    • Delusions — persecutory ("people watching/following"), grandiose, reference (TV/radio sending messages), thought insertion/withdrawal/broadcasting, passivity phenomena
    • Thought disorder — loosening of associations, thought blocking, flight of ideas
    • Negative symptoms — social withdrawal, avolition, flat affect, anhedonia, poor self-care
  • Organic causes to exclude: Substance use (cannabis, stimulants — most common in young people), alcohol withdrawal, prescribed medications, head injury, epilepsy, autoimmune encephalitis (anti-NMDA receptor — young women), thyroid disease, HIV, neurosyphilis.
  • Risk assessment: Risk to self (suicidal ideation, self-neglect), risk to others (command hallucinations to harm), risk from others (vulnerability — being exploited).
  • Premorbid function: Change from baseline, school/work performance, relationships.
  • PMH: Previous mental health history, medications, family psychiatric history (schizophrenia — 10x risk first-degree relative).

⚠️ Examiner / Role-player Instructions — Not for Candidate

You are Reuben Clarke. You are guarded but cooperative if the candidate is non-threatening. You hear two voices (3rd person, talking about you — "he's a bad person"). You believe the TV is sending you personal messages. You smoke cannabis daily. You have not slept properly for 2 weeks. You have no thoughts of harming yourself or others. You dropped out of university 3 weeks ago.

🎭 Patient Script ▼
  • Voices: "I hear two people talking about me. They're not in the room — they comment on what I'm doing. They say I'm a bad person." 3rd person auditory hallucinations. Not commanding.
  • TV/delusions: "The newsreader is talking directly to me — giving me coded messages." Ideas of reference. Persecutory — "someone is watching me through the screens."
  • Cannabis: "I've smoked weed since I was 16 — daily for the last 2 years. Strong stuff."
  • Sleep: "I can't sleep — maybe 2–3 hours a night."
  • Function: Dropped out of university 3 weeks ago. Stopped seeing friends. Not eating well.
  • Risk: No suicidal ideation. No thoughts of harming others. Voices not commanding.
  • PMH: No previous mental health input. No medications. Uncle had "a breakdown" in his 20s.
CriterionMarks
Psychotic Symptoms
Auditory hallucinations — number of voices, content, 2nd vs 3rd person, command hallucinations3
Delusions of reference — TV messages elicited1
Persecutory delusions — being watched elicited1
Thought insertion / withdrawal / broadcasting asked1
Negative symptoms — withdrawal, avolition, self-care, anhedonia elicited2
Organic Causes
Cannabis / substance use asked and quantified — daily use elicited2
Other substances asked — stimulants, alcohol1
Head injury, seizures, prescribed medications asked1
Risk Assessment
Suicidal ideation directly asked1
Risk to others — command hallucinations specifically asked1
Background
Premorbid function — university dropout, social withdrawal established1
Family psychiatric history — uncle's breakdown elicited1
Non-judgemental, sensitive approach — maintains rapport throughout2
Total20
🩺 Clinical Examination
🩺
Burns Assessment — Rule of Nines & Fluid Resuscitation
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 35-year-old man, 80kg, has been brought to resus following a house fire. He has burns to his body. He is conscious, GCS 14, SpO₂ 94% on 15L O₂, HR 118, BP 102/68.

The examiner will describe the burn distribution. Please assess the burns systematically, calculate the TBSA%, classify burn depth, identify any airway concerns, and calculate his Parkland formula fluid requirement for the first 24 hours.

🔑 Burns Assessment Framework ▼
  • Airway — highest priority: Singed nasal hair/eyebrows, hoarse voice, stridor, carbonaceous sputum, facial burns, enclosed space — early intubation before airway swells. Call anaesthetics immediately.
  • Rule of Nines (adult): Head 9%, each arm 9%, chest 9%, abdomen 9%, upper back 9%, lower back 9%, each thigh 9%, each lower leg 9%, perineum 1%. Palm of patient's hand (including fingers) = approximately 1% TBSA.
  • Burn depth classification:
    • Superficial (epidermal): red, painful, no blistering — e.g. sunburn. Does NOT count towards TBSA for fluids.
    • Superficial partial thickness: blistered, moist, pink, very painful, blanches.
    • Deep partial thickness: pale/mottled, less painful (nerve damage), does not blanch.
    • Full thickness: white/brown/black, leathery, painless, does not blanch. Escharotomy if circumferential.
  • Parkland formula: 4 ml × weight (kg) × %TBSA = total volume (mL) of Hartmann's solution in first 24 hours. Give half in first 8 hours from time of burn (not arrival), half in next 16 hours.
  • Referral to burns unit: >10% TBSA adult (>5% child), full thickness, face/hands/feet/genitalia/joints, circumferential, chemical/electrical, inhalation injury.

⚠️ Examiner Instructions — Not for Candidate

Read the burn description aloud. Ask the candidate to calculate Parkland fluids. Key assessment: airway recognition and correct Parkland calculation.

📋 Burns Description to Read Aloud ▼

"He has singed eyebrows and nasal hair. His voice is hoarse. There is soot around his mouth and nose. Burns distribution: entire right arm (superficial partial thickness — blistered, pink, painful). Anterior chest (deep partial thickness — pale, reduced sensation). Both anterior thighs (superficial partial thickness — blistered). Perineum spared."

Follow-up Q1: "Calculate his TBSA and Parkland fluid requirement."

Expected: Right arm = 9%, Anterior chest = 9%, Both anterior thighs = 9% (4.5% each). Total TBSA = 27%. Parkland: 4 × 80 × 27 = 8,640 mL Hartmann's in 24 hours. Half (4,320 mL) in first 8 hours from time of burn; half (4,320 mL) in next 16 hours.

Follow-up Q2: "What is your most urgent action right now?"

Expected: Secure the airway immediately — hoarse voice + singed hair + carbonaceous sputum + enclosed space = inhalation injury. Call anaesthetics for immediate RSI before progressive oedema closes the airway. High-flow oxygen (carbon monoxide poisoning possible — 100% O₂ via NRB).

CriterionMarks
Airway Assessment
Immediately identifies airway at risk — singed hair, hoarse voice, carbonaceous sputum2
Calls anaesthetics for early intubation — does not delay2
100% O₂ via NRB — carbon monoxide poisoning considered1
TBSA Calculation
Uses Rule of Nines correctly — right arm 9%, anterior chest 9%, anterior thighs 9%3
Correct total TBSA — 27%2
Correctly excludes superficial (epidermal) burns from TBSA calculation1
Burn Depth Classification
Correctly classifies superficial partial thickness and deep partial thickness features2
Parkland Formula
Correct formula stated — 4 ml × weight × %TBSA1
Correct calculation — 8,640 mL Hartmann's2
Correct fluid timing — half in first 8 hours from burn time, half in next 16 hours2
Burns unit referral criteria stated — >10% TBSA, inhalation, face/hands1
Urine output target stated — 0.5–1 mL/kg/hr to guide fluid titration1
Total20
🩺
Cervical Spine Clearance — Post Trauma
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 28-year-old woman was involved in a rear-end RTC 2 hours ago. She has neck pain and was brought in with a hard collar in situ. GCS is 15, she is alert and cooperative. She has no distracting injuries and is not intoxicated.

Please perform a clinical cervical spine assessment using the NEXUS criteria and Canadian C-Spine Rule, and decide whether imaging is required. The examiner will give findings as you examine.

🔑 NEXUS & Canadian C-Spine Rule ▼
  • NEXUS low-risk criteria (ALL must be present to clear without imaging):
    1. No midline cervical tenderness
    2. No focal neurological deficit
    3. Normal level of alertness (GCS 15)
    4. No evidence of intoxication
    5. No painful distracting injury
  • Canadian C-Spine Rule (more specific): No imaging if: age <65, no dangerous mechanism (fall >1m, axial load, high-speed MVC, rollover, ejection, motorised recreational vehicles, bicycle), no paraesthesia in extremities — AND able to actively rotate neck 45° left and right.
  • Examination: With collar removed (assistant maintains MILS), palpate all cervical spinous processes C1–C7 for midline tenderness. Assess ROM (only if NEXUS criteria met). Full neurological exam — power, sensation, reflexes upper and lower limbs. Assess for priapism (cord injury). Log-roll for thoracolumbar assessment.
  • Imaging: CT C-spine — gold standard. Plain XR — 3 views (AP, lateral, odontoid peg) — less sensitive, largely replaced by CT in significant trauma. MRI — ligamentous injury, cord compression, SCIWORA.
  • SCIWORA: Spinal Cord Injury Without Radiological Abnormality — normal CT but neurological deficit — needs MRI urgently.

⚠️ Examiner Instructions — Not for Candidate

Feed findings as candidate examines. This patient has midline C5 tenderness — collar cannot be removed clinically. CT C-spine required. Ask: "The CT is reported as normal but she has tingling in both hands — what do you do?" (SCIWORA — urgent MRI.)

📋 Findings to Feed ▼
  • GCS: 15 — alert and oriented. Not intoxicated.
  • Distracting injuries: None.
  • Neurological exam: Power 5/5 all groups. Sensation intact. Reflexes normal bilaterally. No priapism.
  • Cervical palpation (with MILS): Midline tenderness at C5 spinous process. No paravertebral muscle tenderness only — midline bony tenderness present.
  • ROM: Do NOT test ROM — midline tenderness present → NEXUS criterion not met → cannot clear clinically.
  • Conclusion: NEXUS criteria not met (midline tenderness) → CT C-spine required.
CriterionMarks
Framework Application
States NEXUS criteria — lists all 5 correctly3
Confirms GCS 15, no intoxication, no distracting injury — 3 criteria met1
Examination Technique
Maintains MILS throughout collar removal — does not remove collar without MILS2
Palpates all midline cervical spinous processes C1–C7 systematically2
Correctly identifies midline C5 tenderness — NEXUS criterion failed2
Does NOT test ROM — correctly withholds due to midline tenderness2
Neurological Assessment
Full upper and lower limb neurological exam — power, sensation, reflexes2
Checks for priapism — cord injury marker1
Imaging Decision & SCIWORA
Correct decision — CT C-spine required, cannot clear clinically1
SCIWORA — normal CT with neurological deficit requires urgent MRI2
Collar maintained until imaging reviewed and cleared1
Total20
🔧 Practical Procedures
🔧
Arterial Blood Gas Sampling — Radial Artery
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 67-year-old man with COPD and increasing breathlessness requires an arterial blood gas sample. He is on warfarin for AF (INR 2.4 last week).

Please demonstrate radial artery ABG sampling on this manikin. Talk through each step including site selection, Allen's test, technique and post-procedure care. State complications specific to this patient.

📝 ABG Sampling — Key Steps ▼
  • Site selection: Radial artery preferred (superficial, collateral ulnar supply, easy compression). Alternatives: femoral (large, easy but cannot compress well — avoid in anticoagulated), brachial (end artery — avoid if possible), dorsalis pedis.
  • Allen's test: Compress both radial and ulnar arteries. Patient makes fist until blanched. Release ulnar — hand should flush pink within 5–7 seconds (patent ulnar supply confirmed). If >15 seconds — poor collateral circulation → choose different site.
  • Equipment: Pre-heparinised ABG syringe (or 2 mL syringe with heparin 0.5 mL), 23G needle, gloves, chlorhexidine swab, gauze, 1% lidocaine (optional for conscious patient), sharps bin, ice (if delay in analysis >15 min).
  • Technique: Hyperextend wrist (rolled towel). Palpate radial pulse with 2 fingers. Clean with chlorhexidine. Local anaesthetic subcutaneously optional. Insert needle bevel up at 45° (some sources 30–60°). Advance until pulsatile bright red blood fills syringe spontaneously. Remove, expel air immediately, cap syringe, mix with heparin (roll between palms). Apply firm pressure 5 minutes (longer if anticoagulated — this patient 10+ minutes given warfarin).
  • Complications: Haematoma (especially anticoagulated — longer pressure required), vasospasm, arterial thrombosis, pseudoaneurysm, nerve injury (superficial radial nerve), infection.
  • Analysis: Within 15 minutes at room temperature or on ice. Label with FiO₂, temperature, patient details.

⚠️ Examiner Instructions — Not for Candidate

Assess Allen's test performance, needle angle and technique, air expulsion, and pressure duration. Ask: "Allen's test is negative — the hand does not flush. What do you do?" (Choose alternative site — femoral or other arm.)

CriterionMarks
Preparation
Consent, checks anticoagulation status — notes warfarin, plans extended pressure2
Correct equipment — pre-heparinised syringe or heparin flush1
Wrist hyperextended correctly — rolled towel or assistant1
Allen's Test
Allen's test performed correctly — both arteries compressed, fist made, ulnar released3
Correctly interprets positive result — flush <7 seconds, safe to proceed1
States action if negative — alternative site selected1
Technique
Palpates radial pulse with 2 fingers, cleans site1
Correct needle angle — bevel up, 45° (30–60° acceptable)1
Identifies pulsatile bright red blood — arterial confirmation1
Air expelled immediately, syringe capped, rolled between palms2
Post-Procedure
Firm pressure applied — states minimum 10 minutes given warfarin2
Complications specific to anticoagulated patient stated — haematoma risk1
Sample labelled with FiO₂, analysed within 15 minutes or on ice1
Checks for haematoma / neurovascular status after procedure1
Total20
🔧
Major Haemorrhage Protocol — Damage Control Resuscitation
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 38-year-old man is brought to resus following a high-speed RTC. He has an open femoral fracture with active arterial bleeding. He is pale, sweaty and confused. BP 72/40, HR 148, SpO₂ 92%, GCS 12.

Please talk the team through your immediate management, including haemorrhage control, activation of the major haemorrhage protocol, and your damage control resuscitation strategy. You have 8 minutes.

📝 Major Haemorrhage & Damage Control Resuscitation ▼
  • Haemorrhage control — first priority: Direct pressure, tourniquet (limb — apply proximal to wound, document time), wound packing with haemostatic gauze (Combat Gauze/QuikClot), pelvic binder (if pelvic fracture), REBOA (interventional — specialist), surgical haemostasis.
  • Activate Major Haemorrhage Protocol (MHP): Contact blood bank — releases pre-set pack of red cells:FFP:platelets in 1:1:1 ratio. Typical pack: 6 units pRBC + 6 units FFP + 1 pool platelets.
  • Damage Control Resuscitation (DCR) principles:
    • Permissive hypotension: target SBP 80–90 mmHg (50 mmHg if TBI) until surgical haemostasis — avoid over-resuscitation (dilutes clotting factors, worsens coagulopathy)
    • Haemostatic resuscitation: blood products in 1:1:1 ratio (pRBC:FFP:platelets) — NOT crystalloid first
    • Tranexamic acid (TXA): 1g IV over 10 min within 3 hours of injury (CRASH-2 trial) then 1g over 8 hours
    • Avoid lethal triad: Hypothermia, Acidosis, Coagulopathy — warm fluids, warming blanket, correct coagulopathy
    • Calcium: give with blood transfusion (citrate chelates calcium → hypocalcaemia → cardiac effects) — 10 mL 10% calcium chloride per 4 units blood
  • Targets: SBP 80–90, temp >36°C, pH >7.35, calcium >1.1, fibrinogen >1.5 g/L (give cryoprecipitate if <1.5), platelets >50.

⚠️ Examiner Instructions — Not for Candidate

Key assessment: does candidate apply tourniquet first and activate MHP early? Ask: "A junior says to give 2 litres of normal saline first — what do you think?" (Incorrect — blood products in 1:1:1 ratio, not crystalloid. Crystalloid worsens dilutional coagulopathy.) Also ask about TXA timing.

CriterionMarks
Haemorrhage Control
Tourniquet applied proximally — time documented2
Wound packing with haemostatic gauze stated1
Major Haemorrhage Protocol
MHP activated immediately — contacts blood bank2
1:1:1 ratio blood products stated — pRBC:FFP:platelets2
Correctly rejects crystalloid-first approach — explains dilutional coagulopathy2
Damage Control Resuscitation
Permissive hypotension — target SBP 80–90 until surgical haemostasis2
Tranexamic acid — 1g IV within 3 hours, correct dose and timing2
Calcium replacement with transfusion — 10% calcium chloride dose stated1
Lethal triad recognised — hypothermia, acidosis, coagulopathy — active warming2
Fibrinogen target >1.5 g/L — cryoprecipitate if low1
Urgent surgical/orthopaedic referral — haemostasis is definitive treatment1
Total20
💬 Communication
💬
Obtaining Consent — Procedural Sedation
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

Mrs Nadia Patel, 42 years old, has a dislocated right hip following a fall. She needs procedural sedation in the ED for hip reduction. She is anxious and has never had sedation before. She has a nut allergy and last ate a sandwich 3 hours ago.

Please obtain valid informed consent for procedural sedation from Mrs Patel. You have 8 minutes.

💡 Valid Consent & Sedation Key Points ▼
  • Valid consent requires: Capacity (understand, retain, weigh, communicate), voluntary (not coerced), informed (sufficient information).
  • Information to give (Montgomery ruling — material risks): What the procedure is and why needed, how sedation works (you will be drowsy/relaxed but not fully asleep — "twilight sedation"), benefits, risks, alternatives (GA, nerve block, no procedure).
  • Risks of procedural sedation to discuss: Drowsiness (most common), nausea/vomiting, paradoxical agitation (especially midazolam in elderly), respiratory depression (most serious — monitoring and resuscitation equipment present), aspiration (recent food — 3 hours — increased risk, discuss).
  • Fasting — important: She ate 3 hours ago. RCOA guidelines: 6 hours solids, 2 hours clear fluids for GA. For ED procedural sedation — benefit vs risk assessment. Ketamine — lower aspiration risk (preserves airway reflexes). Decision: proceed with ketamine, risk explained and documented. Vs delay 3 more hours (pain ongoing — weigh up).
  • Allergy: Nut allergy — check drug allergies. Most sedation agents not nut-derived but always ask and document. Propofol — soya/egg based, some concern with nut allergies (evidence limited but worth noting and documenting).
  • Post-sedation: Cannot drive, operate machinery, sign legal documents for 24 hours. Need escort home.

⚠️ Examiner / Role-player Instructions — Not for Candidate

You are Nadia Patel. You are in pain and nervous. Ask: "Will I be unconscious?" "What if I stop breathing?" "I ate 3 hours ago — is that safe?" "I'm allergic to nuts — does that matter?" If candidate explains clearly and addresses your concerns, become reassured. If rushed, remain anxious and ask more questions.

CriterionMarks
Capacity & Setting
Confirms patient has capacity — understands, can make decision1
Private setting, introduces self and role, checks patient's current understanding1
Explaining the Procedure
Explains why needed — hip needs to be relocated, sedation allows this safely1
Explains sedation clearly — "twilight," relaxed but not fully asleep, aware but comfortable2
Explains monitoring — oxygen, pulse, BP, doctor present throughout1
Risks & Benefits
Common risks — drowsiness, nausea, paradoxical agitation explained2
Serious risk — respiratory depression explained simply, reassures monitoring in place2
Fasting — addresses 3-hour concern honestly, explains risk/benefit decision2
Nut allergy addressed — asks about drug allergies, notes propofol caution2
Alternatives & Aftercare
Alternatives mentioned — nerve block, general anaesthesia, delay1
Post-sedation advice — no driving, need escort home for 24 hours1
Checks understanding, invites questions, obtains verbal/written consent2
Non-anxious, clear communication — patient reassured1
Total20
💬
DNACPR Discussion — End of Life
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 registrar. Mr Harold Booth, 81 years old, has been brought in with an acute exacerbation of his end-stage COPD. He has metastatic lung cancer (diagnosed 3 months ago, not for active treatment), heart failure and is frail and bedbound at baseline. His daughter Mrs Jennifer Booth is present.

He is currently drowsy but rousable, GCS 12. He has previously expressed to his GP that he would not want to be resuscitated. There is no DNACPR form in his notes.

Please have a DNACPR discussion with his daughter. You have 8 minutes.

💡 DNACPR Key Principles ▼
  • DNACPR is a clinical decision — it is not the family's decision to make, nor is it the doctor's alone. It is made in the patient's best interests based on clinical judgement.
  • What DNACPR does NOT mean: It does not mean withdrawing all treatment — IV fluids, antibiotics, oxygen, analgesia, and symptom control continue. DNACPR only applies to CPR in the event of cardiac arrest.
  • Discussing with family: Explain the clinical situation honestly. Explain CPR — what it involves (chest compressions, defibrillation, intubation), realistic outcomes in frail patients with metastatic cancer and end-stage COPD (extremely poor — CPR likely to cause harm, fractures, unlikely to achieve meaningful recovery).
  • Patient's previously expressed wishes: Patient told his GP he did not want resuscitation — this is relevant and should be documented and respected even without a formal form.
  • Family cannot override: If family demands CPR despite clinical decision that it is not in patient's best interests — explain sensitively but clearly that the DNACPR decision rests with the clinical team. Offer second opinion. Offer formal PALS/complaint process.
  • RESPECT / ReSPECT form: Recommended Recommended Summary Plan for Emergency Care and Treatment — should be completed.

⚠️ Examiner / Role-player Instructions — Not for Candidate

You are Jennifer Booth. You are tearful and frightened. You love your father deeply. Initially say: "I want everything done for him — please don't give up on him." If candidate explains clearly and compassionately, soften. Then ask: "But what if he arrests — are you really not going to try?" Test whether candidate holds firm while remaining empathic. Do not accept the decision easily — provide realistic pushback.

CriterionMarks
Setting & Opening
Private, sits down, empathic opening — acknowledges how difficult this is1
Establishes what daughter already knows about father's condition1
Clinical Context
Explains clinical situation clearly — end-stage COPD, metastatic cancer, frailty2
Explains CPR honestly — chest compressions, shocks, breathing tube — what it involves2
Explains realistic outcome — very unlikely to survive, likely to cause harm2
Patient's Wishes
References patient's previously expressed wish not to be resuscitated2
Explains DNACPR applies only to cardiac arrest — all other treatment continues2
Handling Family Response
Does not tell family it is their decision — clarifies it is a clinical decision2
Remains compassionate but clear when family pushes back2
Offers second opinion / senior review / PALS if family remains unhappy1
Mentions ReSPECT form / advance care planning going forward1
Allows silence, acknowledges grief — does not rush1
Does not use jargon — checks understanding throughout1
Total20
📊 Data Interpretation
📊
Electrolyte Interpretation — Hyperkalaemia
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

A 68-year-old man with CKD stage 4 and type 2 diabetes presents feeling generally unwell with muscle weakness and palpitations for 2 days. He takes ramipril, spironolactone and metformin.

Obs: HR 52 (irregular), BP 148/90, SpO₂ 97%, GCS 15.

The examiner will give you his bloods and ECG. Interpret them systematically and outline your stepwise management. This is a time-critical station.

💡 Hyperkalaemia — ECG Changes & Treatment Steps ▼
  • ECG progression with rising K⁺: Peaked tall T waves (earliest) → PR prolongation → P wave flattening/loss → QRS widening → sine wave pattern → VF/asystole.
  • Treatment (stepwise — remember C BIG K DROP):
    1. C — Calcium gluconate / chloride: 10 mL 10% calcium gluconate IV over 5–10 min (membrane stabilisation — does NOT lower K⁺). Repeat if ECG changes persist. Effect within minutes, lasts 30–60 min.
    2. B — Bicarbonate: 50 mL 8.4% sodium bicarbonate IV if acidotic — shifts K⁺ into cells.
    3. I — Insulin + Glucose: 10 units Actrapid in 50 mL 50% dextrose (or 10 units in 125 mL 20% dextrose) IV over 15–30 min — shifts K⁺ into cells. Onset 15–30 min. Monitor BM hourly for 6 hours (hypoglycaemia risk).
    4. G — (Glucose — already in above)
    5. K — Kayexalate / Resonium: Calcium resonium 15g PO/PR — removes K⁺ from gut (slow — hours to days). Patiromer / sodium zirconium cyclosilicate (Lokelma) — newer, faster oral K⁺ binders.
    6. D — Dialysis: Definitive treatment for refractory hyperkalaemia in renal failure — contact renal team urgently.
    7. R — Remove cause: Stop ramipril, spironolactone. Hold metformin if AKI.
    8. O — Other — Salbutamol: 10–20 mg nebulised salbutamol — shifts K⁺ into cells. Adjunct treatment.
    9. P — (Prevent recurrence)

⚠️ Examiner Instructions — Not for Candidate

Read results and ECG aloud. Key assessment: calcium gluconate first before anything else. Ask: "A nurse asks if she should give the insulin now — what do you say?" (Only after calcium gluconate is given.) Also ask about monitoring for hypoglycaemia after insulin.

📋 Results to Read Aloud ▼

Bloods: K⁺ 7.2 mmol/L (↑↑), Na 136, Urea 28.4 (↑↑), Creatinine 412 (↑↑ — AKI on CKD), pH 7.22, HCO₃ 14 (metabolic acidosis), eGFR 11, Glucose 8.2, CK 320.

ECG: Bradycardia 52 bpm, irregular. Absent P waves. Markedly widened QRS (160ms). Tall peaked T waves in precordial leads. No sine wave pattern yet.

Follow-up Q1: "What is your first drug and why?"

Expected: Calcium gluconate 10 mL 10% IV — membrane stabilisation. Prevents VF. Does not lower K⁺ but protects heart immediately. Must be given before insulin/glucose.

Follow-up Q2: "After insulin-dextrose, what monitoring is required and for how long?"

Expected: BM monitoring every hour for 6 hours — significant hypoglycaemia risk 1–2 hours post-insulin.

CriterionMarks
Data Interpretation
Identifies severe hyperkalaemia — K⁺ 7.21
AKI on CKD recognised — creatinine 412, urea 28.4, eGFR 111
Metabolic acidosis identified — contributes to K⁺ elevation1
ECG Interpretation
Absent P waves identified1
Widened QRS (160ms) identified — life-threatening feature2
Peaked T waves identified1
Recognises ECG as life-threatening — immediate treatment required1
Treatment — correct order scores marks
Calcium gluconate FIRST — membrane stabilisation, dose and route correct3
Insulin + dextrose — 10 units Actrapid, correct glucose preparation2
Sodium bicarbonate — given for metabolic acidosis1
Salbutamol nebuliser as adjunct1
Nephrology referral for dialysis — definitive treatment1
Offending drugs stopped — ramipril, spironolactone1
BM monitoring hourly for 6 hours post-insulin2
Total20
📊
Paediatric Trauma — APLS Primary Survey Data
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

A 6-year-old boy, 22 kg, is brought to resus after being struck by a car at 30 mph. He was thrown 3 metres. He was crying at the scene but is now quiet and pale.

The examiner will give you his primary survey findings. Interpret each finding against paediatric normal ranges, identify life threats and state your immediate management for each.

💡 Paediatric Normal Ranges & APLS Framework ▼
  • Paediatric normal ranges (6-year-old): HR 80–120, RR 20–30, SBP 90–110 (minimum SBP = 70 + 2×age = 82 mmHg), GCS 15. Weight estimate: APLS = (age + 4) × 2 = 20 kg (actual 22 kg).
  • ABCDE primary survey:
    • A — Airway with C-spine (MILS). Airway open? Noises?
    • B — Breathing: RR, SpO₂, chest movement, breath sounds, trachea
    • C — Circulation: HR, BP, CRT, skin colour/temperature, haemorrhage control
    • D — Disability: GCS/AVPU, pupils, BM, posturing
    • E — Exposure: temperature, injuries head to toe, log-roll
  • Fluid resuscitation in paediatric trauma: 10 mL/kg 0.9% NaCl IV/IO bolus. Reassess. Repeat max 3 times (30 mL/kg). If no response → blood transfusion O-negative (10 mL/kg). Consider MHP activation.
  • Paediatric trauma — key differences: Children compensate for longer (HR goes up but BP maintained until decompensation — sudden collapse). Abdominal organs proportionally larger — more vulnerable. Head proportionally larger — more common site of injury. Rib cage more compliant — pulmonary contusion without rib fracture. Non-accidental injury (NAI) must always be considered.

⚠️ Examiner Instructions — Not for Candidate

Read findings aloud. Ask candidate to interpret each value against normal ranges, identify life threats, and give weight-based management. Ask: "Why are children deceptive in haemorrhagic shock?" (They compensate — maintain BP until late decompensation, then crash suddenly.)

📋 Primary Survey Findings to Read ▼

A: Airway open, no stridor, C-spine immobilised.

B: RR 36 (↑), SpO₂ 91% on air. Reduced air entry left base. Trachea central. Dull to percussion left base.

C: HR 148 (↑), BP 82/54 (↓ — at lower limit for age). CRT 4 seconds centrally. Pale, cold peripheries. Abdomen — bruising across left upper quadrant (seat belt sign). Tender left upper quadrant.

D: GCS 11 (E3V3M5). Pupils equal and reactive. BM 4.8.

E: Temp 35.8°C. Bruising L upper quadrant. Pelvis stable. Long bones intact.

Follow-up Q1: "What are the two immediate life threats and how do you manage them?"

Expected: (1) Left haemothorax — chest drain (22 kg child: 20Fr drain, BTS formula: size = 4 × weight^0.5, or use tube size = age/2 + 8). (2) Intra-abdominal haemorrhage (splenic injury likely — seat belt sign, LUQ bruising, haemodynamic shock) — 10 mL/kg 0.9% NaCl IV/IO, activate MHP, urgent CT abdomen, surgical referral.

Follow-up Q2: "Should you give him 3 boluses of saline before blood?"

Expected: No — in haemorrhagic trauma, limit crystalloid. 1–2 boluses maximum then blood (O-negative 10 mL/kg). Avoid dilutional coagulopathy. Damage control resuscitation applies in children too.

CriterionMarks
A & B Assessment
Airway confirmed — C-spine immobilised throughout1
RR 36 identified as tachypnoeic for age (normal 20–30)1
Left haemothorax identified — dull, reduced air entry, SpO₂ 91%2
Immediate intervention — high-flow O₂, chest drain left side, correct size for child2
C Assessment
HR 148 identified as tachycardic (normal 80–120 for age)1
BP 82/54 interpreted correctly — at lower limit for age, compensated shock2
Intra-abdominal injury suspected — seat belt bruising, LUQ tenderness, haemodynamic instability2
Fluid resuscitation — 10 mL/kg (220 mL) 0.9% NaCl IV/IO bolus2
Blood transfusion — O-negative 10 mL/kg after 1–2 crystalloid boluses1
D, E & Overall
GCS 11 — reduced consciousness, head injury considered1
Hypothermia 35.8°C — active warming stated1
Children compensate in shock — explains deceptive nature, late decompensation2
Urgent CT trauma and surgical/paediatric surgery referral1
NAI considered and mentioned given mechanism and bruising pattern1
Total20
← OSCE Bank 4