Blunt Chest Trauma

Quick Answer

One-liner: Blunt chest trauma encompasses a spectrum of thoracic injuries from mechanisms like motor vehicle collisions, falls, or crush injuries; immediate life-threatening conditions include tension pneumothorax, massive haemothorax, cardiac tamponade, flail chest, and aortic injury - all requiring rapid identification and management using ATLS principles.

Blunt chest trauma accounts for 25-50% of all trauma deaths and is the second leading cause of mortality after head injury. Life-threatening injuries must be identified during the primary survey, with immediate interventions taking precedence over diagnostic imaging. The majority of chest trauma patients can be managed non-operatively, but 10-15% require emergency thoracotomy or tube thoracostomy.

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ACEM Exam Focus

Primary Exam Relevance

• Anatomy: Thoracic cage anatomy, rib articulations, intercostal neurovascular bundles, mediastinal compartments, diaphragmatic relationships
• Physiology: Negative intrathoracic pressure, ventilation-perfusion matching, pleural pressure dynamics, diaphragmatic excursion
• Pharmacology: Analgesics for rib fractures (multimodal approach), anticoagulation reversal, antimicrobial prophylaxis

Fellowship Exam Relevance

• Written: ATLS primary survey management, FAST scan interpretation, chest injury classification, flail chest pathophysiology, indications for thoracotomy
• OSCE: Resuscitation station with deteriorating trauma patient, chest drain insertion assessment, communication with trauma team, handover to tertiary centre
• Key domains tested: Medical Expert (injury patterns, management), Communicator (breaking bad news, explaining procedures), Leader (trauma team coordination)

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Key Points

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Epidemiology

Australian/NZ Specific

• Leading causes: Motor vehicle collisions (45%), falls (30%), assault (10%), sports injuries (5%) [7]
• NSW Trauma Registry: Chest trauma accounts for 28% of major trauma presentations, with ISS greater than 15 in 40% of cases [8]
• Indigenous population: Aboriginal and Torres Strait Islander peoples experience 2-3 times higher incidence of trauma-related chest injuries [9]
• Rural/remote: Higher mortality rates (up to 35%) due to delayed access to definitive care [10]

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Pathophysiology

Mechanism

Blunt chest trauma results from:

1. Deceleration forces: Rapid deceleration causes organs to continue moving, tearing vascular pedicles and parenchyma
2. Compression forces: Direct crush injury to thoracic cage and intrathoracic contents
3. Blast injury: Primary blast wave (pressure), secondary (shrapnel), tertiary (displacement)
4. Shear forces: Rotational forces causing mediastinal tearing and vessel injury

Energy Transfer

Kinetic Energy = 1/2 × mass × velocity²

High-velocity mechanisms (greater than 60 km/h MVCs) produce greater energy transfer and more severe injuries.

Pathological Progression

Impact → Structural disruption → Haemorrhage/contusion → Physiological compromise
       ↓                      ↓                    ↓
   Immediate          Inflammatory           Systemic
   (minutes)          response (hours)       effects (days)
       ↓                      ↓                    ↓
  Airway/oxygen       Pulmonary             Multi-organ
  compromise         dysfunction            failure

Why It Matters Clinically

• Delayed presentation: Some injuries (diaphragmatic rupture, aortic injury) may not manifest immediately
• Second hit phenomenon: Systemic inflammatory response worsens pulmonary function over 24-72 hours
• Masked examination: Associated injuries (head trauma, spinal injury) can blunt pain responses
• Cardiopulmonary reserve: Elderly patients with limited reserve deteriorate rapidly with pulmonary contusions

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Injury Patterns

Rib Fractures

Classification: Simple vs. Flail vs. Displaced

Complications:

• Pulmonary contusion (adjacent lung injury)
• Pneumothorax (lacerated lung)
• Haemothorax (intercostal vessel injury)
• Pain → atelectasis → pneumonia

Significance: Mortality increases with each rib fracture:

• 1-2 ribs: 5%
• 3-5 ribs: 10%
• Greater than 6 ribs: 20%
• Greater than 65 years: Mortality doubles for each fracture [11]

Key anatomical caution: Ribs 1-3 protected by scapula and clavicle, but fractures here indicate severe force and associated great vessel injury risk. Ribs 9-12 risk liver, spleen, or kidney injury.

Pneumothorax

Types:

1. Simple: No tension, lung partially collapsed
2. Tension: Progressive mediastinal shift, cardiovascular collapse
3. Open: Sucking chest wound, atmospheric communication

Diagnosis:

• Clinical: Decreased breath sounds, hyperresonance, respiratory distress
• CXR: Visible pleural line, absent lung markings
• CT: Gold standard (detects missed small PTX in 30-50%) [12]

Haemothorax

Classification:

• Minimal: Less than 350 mL (blunted costophrenic angle)
• Moderate: 350-1500 mL (partial opacification)
• Massive: Greater than 1500 mL or greater than 200 mL/hour ongoing

Source: Intercostal vessels (80%), internal mammary (10%), lung parenchyma (10%), great vessels (less than 1%) [13]

Pulmonary Contusion

Pathophysiology: Alveolar haemorrhage and interstitial oedema from direct parenchymal injury

Clinical: Respiratory distress, hypoxaemia, bloody secretions, crackles

Worsening pattern: Peak at 24-48 hours due to ongoing inflammatory response

Cardiac Contusion

Mechanism: Direct sternal impact or rapid deceleration

Diagnosis: ECG (most sensitive initial test), cardiac biomarkers (troponin), echocardiography

Complications: Arrhythmias (65%), myocardial dysfunction (15%), cardiac rupture (rare, fatal) [14]

Aortic Injury

Mechanism: Shear at fixed points (ligamentum arteriosum, diaphragmatic hiatus)

Location: 90% at isthmus just distal to left subclavian artery [15]

Presentation: Widened mediastinum (greater than 8 cm at aortic knob), apical cap, left hemothorax, pulse deficits, back pain

Diagnosis: CT angiography (sensitivity 98%, specificity 99%) [16]

Diaphragmatic Rupture

Laterality: Left (70-80%), right (20-30%), bilateral (1-2%) [17]

Mechanism: Increased intra-abdominal pressure + lateral force

Diagnosis: CXR (sensitivity 27%), CT (sensitivity 61-82%), diagnostic laparoscopy/thoracoscopy [18]

Key finding: Nasogastric tube tip in chest

Flail Chest

Definition: Three or more consecutive rib fractures in two or more places creating a free-floating segment

Pathophysiology: Paradoxical movement (inward during inspiration, outward during expiration) AND underlying pulmonary contusion

Clinical: Severe pain, paradoxical chest wall movement, respiratory distress, hypoxaemia

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Clinical Approach

Recognition

High-risk mechanisms:

• Motor vehicle collision greater than 60 km/h
• Fall from height greater than 3 metres
• Steering wheel deformity
• Crush injury
• Pedestrian struck at speed

High-energy clues:

• Dashboard or steering wheel impact marks
• Seatbelt signs (across chest)
• Bruising over sternum or ribs
• Scapular or posterior chest wall tenderness

Initial Assessment

Primary Survey

• A: Assess airway patency. Consider mechanical obstruction from blood, teeth, or vomitus. Rapid sequence intubation if GCS less than 8, respiratory failure, or inability to protect airway.

• B: Assess breathing. Look for respiratory distress rate (greater than 30/min), oxygen saturation, chest wall movement. Listen for equal breath sounds. Feel for tracheal deviation.

  Immediate life-threats to address:

  • "Tension pneumothorax: Needle decompression (2nd intercostal space, midclavicular line)"
  • "Open pneumothorax: Occlusive dressing taped on three sides (flutter valve)"
  • "Massive haemothorax: Large-bore chest drain (usually 32-36 Fr)"
  • "Flail chest with respiratory compromise: Analgesia + ventilatory support"

• C: Assess circulation. Look for haemorrhage, skin colour, temperature. Check peripheral pulses, capillary refill, JVD. Obtain IV access (two large-bore 14G or 16G).

  Immediate life-threats to address:

  • "Cardiac tamponade: Pericardiocentesis or emergent thoracotomy"
  • "Massive haemothorax: Volume resuscitation + blood products"
  • "Hypovolaemic shock: Massive transfusion protocol activation if appropriate"

• D: Assess disability. Check GCS, pupils, limb strength. Evaluate for associated traumatic brain injury, spinal cord injury, or peripheral nerve injury.

• E: Full exposure. Remove all clothing. Inspect for occult injuries (back, axillae, perineum). Log-roll patient for spinal clearance assessment. Prevent hypothermia with warm blankets and warmed fluids.

History

Key Questions

Red Flag Symptoms

Examination

General Inspection

• Work of breathing: Use of accessory muscles, tripod position
• Chest wall symmetry: Deformity, asymmetrical movement
• Surgical emphysema: Subcutaneous crepitus (pneumothorax sign)
• Bruising patterns: Seatbelt sign, steering wheel imprint, scapular tenderness
• Penetrating wounds: Assess for entry/exit wounds

Specific Findings

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Investigations

Immediate (Resus Bay)

Standard ED Workup

Advanced/Specialist

Point-of-Care Ultrasound

E-FAST Extended Protocol:

1. Right upper quadrant: Right pleural space (liver edge)
2. Left upper quadrant: Left pleural space (spleen)
3. Subxiphoid: Pericardial view
4. Lung slides: Pneumothorax assessment

Lung Ultrasound Findings:

• Lung sliding: Normal lung
• Absent lung sliding + lung point: Pneumothorax
• B-lines: Pulmonary oedema or contusion
• Consolidation: Hepatisation of lung tissue (contusion)

Sensitivity: Pneumothorax 94% (vs. CXR 27-50%) [19] Specificity: Pneumothorax 99% [19]

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Management

Immediate Management (First 10 minutes)

1. Primary survey with simultaneous interventions
2. Oxygen (15 L/min via non-rebreather mask) - target SpO2 94-98%
3. Establish two large-bore IV lines (14G or 16G)
4. Monitor: Cardiac, SpO2, NIBP, ECG
5. Obtain supine AP CXR
6. FAST examination
7. Address immediate life threats (decompression, thoracostomy)
8. Pain assessment and analgesia
9. Tetanus prophylaxis if indicated

Resuscitation

Airway

Indications for intubation:

• GCS less than 8
• Respiratory failure (RR greater than 30/min, SpO2 below 90% despite oxygen)
• Severe flail chest with respiratory compromise
• Massive haemothorax with shock
• Airway compromise from facial or neck injury
• Cardiac arrest

Technique: RSI with cervical spine precautions. Use cuffed ETT. Consider cricoid pressure only if active vomiting (standard practice evolving).

Ventilation: Lung-protective strategy: tidal volume 6-8 mL/kg IBW, PEEP 5-10 cmH2O. Avoid barotrauma in lung contusion.

Breathing

Oxygenation: Titrate to SpO2 94-98%. Avoid hyperoxia in COPD patients.

Tension Pneumothorax:

1. Needle thoracocentesis: 14-16G cannula, 2nd intercostal space, midclavicular line
2. Insert perpendicular to chest wall (anterior approach)
3. Listen for rush of air
4. Follow with formal tube thoracostomy (typically 4th-5th intercostal space, midaxillary line)

Open Pneumothorax:

1. Occlusive dressing taped on three sides (flutter valve)
2. Patient placed on injured side down (protects contralateral lung)
3. Definitive: Tube thoracostomy + wound repair

Massive Haemothorax:

1. Large-bore chest drain (32-36 Fr)
2. Position: 4th-5th intercostal space, midaxillary line
3. Output: If greater than 1500 mL initial or greater than 200 mL/hour for 4 hours → Thoracotomy
4. Autotransfusion if available

Circulation

Haemorrhage Control: Internal haemorrhage from chest injuries is a major cause of trauma death.

Massive Transfusion Protocol Activation:

• ABC score greater than or equal to 2:
  • "A: SBP below 90 mmHg"
  • "B: FAST positive"
  • "C: Penetrating mechanism (not applicable to blunt)"
  • "D: Positive GCS less than 8 (assessing associated injuries)"

Blood Product Ratio: 1:1:1 (RBC:Plasma:Platelets) - PROPPR trial demonstrated reduced mortality compared to 1:1:2 [20]

Permissive Hypotension: Target SBP 80-90 mmHg until haemorrhage controlled (contraindicated in TBI, spinal cord injury, pregnancy) [21]

Tranexamic Acid: 1g IV loading over 10 minutes, then 1g over 8 hours. Must be administered within 3 hours of injury (CRASH-2 trial) [22]

Calcium: 1g calcium gluconate after every 4 units of blood to prevent hypocalcaemia from citrate [23]

Medications

Multimodal Analgesia for Rib Fractures

First-line: Paracetamol 1g q6h + NSAID (if no contraindication)

Severe pain: Opioid PCA (morphine 1mg bolus, 5 min lockout) + paracetamol + NSAID

Epidural analgesia: Indicated for greater than 4 rib fractures or severe flail chest. Reduces mortality by up to 40% in elderly [24]

Intercostal nerve block: Ultrasound-guided single-shot or catheter (0.25% bupivacaine, 20 mL per level) [25]

Ongoing Management

Chest Drain Management:

• Secure drain with sutures
• Connect to underwater seal drainage system
• Monitor: Output (hourly), tidalling, swinging, air leak
• Clamp only if accidental disconnection (never otherwise)
• Remove when: Lung fully expanded, no air leak for 24h, output below 200 mL/day

ICU Admission Criteria:

• Severe flail chest requiring ventilation
• Bilateral pulmonary contusions with PaO2/FiO2 below 200
• Cardiac contusion with arrhythmias or reduced EF
• Severe chest wall injury requiring epidural analgesia
• ISS greater than 25 with chest component

Ventilation Strategy for Lung Contusion:

• Lung-protective ventilation: TV 6 mL/kg, RR 20-24, PEEP 8-12
• Permissive hypercapnia: target PaCO2 45-55 mmHg (pH greater than 7.25)
• Recruitment manoeuvres: Caution due to barotrauma risk
• Prone positioning: Consider for ARDS (PaO2/FiO2 below 150)

Definitive Care

Thoracotomy Indications:

• Cardiac arrest with penetrating chest wound
• Ongoing haemorrhage greater than 200 mL/hour
• Massive haemothorax greater than 1500 mL initial
• Suspected great vessel injury on CT
• Evacuation of massive pericardial tamponade

Thoracoscopy Indications:

• Persistent air leak greater than 7 days
• Retained haemothorax (clotted) preventing lung expansion
• Diagnosis of diaphragmatic injury
• Lung laceration repair

Video-Assisted Thoracoscopic Surgery (VATS): Increasingly used for stable patients with haemothorax, lung lacerations, or diaphragmatic injuries.

Surgical Rib Fixation: Indicated for:

• Flail chest with respiratory failure requiring ventilation
• Severe chest wall deformity
• Non-union rib fractures with chronic pain
• Failure of conservative management with ongoing pain or atelectasis [26]

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Disposition

Admission Criteria

• ICU: Severe flail chest, bilateral pulmonary contusions, cardiac contusion with complications, ISS greater than 25
• Ward: 3 or more rib fractures with adequate analgesia, simple pneumothorax with drain in situ, monitored observation
• Observation Unit: Isolated rib fracture 1-2 ribs in young healthy patient with good pain control, no comorbidities

ICU/HDU Criteria

• Severe flail chest requiring mechanical ventilation
• PaO2/FiO2 below 200 on maximal oxygen therapy
• Cardiac tamponade requiring monitoring
• Massive haemothorax post-thoracotomy
• Elderly (greater than 65 years) with greater than 3 rib fractures
• Associated severe injuries (head, abdomen, orthopaedic)

Discharge Criteria

Safe discharge possible if:

• 1-2 rib fractures
• No pneumothorax or haemothorax on CXR
• SpO2 94%+ on room air
• Adequate pain control on oral analgesia
• No comorbidities (COPD, cardiac disease, anticoagulation)
• Reliable social support
• Follow-up arranged (GP or trauma clinic)

Red flags to return:

• Increasing shortness of breath
• Chest pain not controlled by analgesia
• Fever (greater than 38°C)
• Coughing blood
• Dizziness or fainting

Follow-up

• GP referral: All chest trauma patients should see GP within 1 week
• Trauma clinic: Follow-up for complex injuries, surgical patients
• Physiotherapy: Breathing exercises, incentive spirometry
• Radiology: Follow-up CXR at 48 hours for rib fractures (pneumothorax may develop delayed)

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Special Populations

Paediatric Considerations

Key differences:

• Chest wall more compliant (less protection for underlying organs)
• Greater cardiothoracic ratio (mediastinal shift more significant)
• Higher fatality from similar mechanism due to limited reserve
• Rib fractures less common (indicate high-energy mechanism)

Analgesia: Multimodal approach preferred (paracetamol + NSAID + local blocks). Opioids with caution due to respiratory depression risk.

Dosing:

• Paracetamol: 15 mg/kg q6h
• Ibuprofen: 10 mg/kg q8h
• Morphine: 0.1-0.2 mg/kg q2-4h PRN

Pregnancy

Modifications:

• Left lateral displacement of uterus (aortocaval compression prevention)
• Oxygen target SpO2 95-98% (physiological hypoxia of pregnancy)
• Lower threshold for admission (reduced reserve)
• Fetal monitoring after 20 weeks gestation
• Radiation minimisation (CT when clinically indicated, abdominal shielding)

Analgesia: Avoid NSAIDs in third trimester (premature ductus arteriosus closure risk).

Elderly

Geriatric considerations:

• Higher mortality for equivalent injuries (limited reserve, comorbidities)
• Reduced pain perception may mask severity
• Rib fractures associated with significant morbidity (pneumonia, respiratory failure)
• Epidural analgesia strongly recommended for greater than 3 rib fractures [27]

Indigenous Health

Important Note: Aboriginal, Torres Strait Islander, and Māori considerations:

• Higher burden: Aboriginal and Torres Strait Islander peoples experience 2-3 times higher incidence of trauma-related chest injuries, often from MVCs and assaults [9]
• Comorbidities: Higher prevalence of COPD, cardiovascular disease, diabetes complicating management
• Cultural safety: Use Aboriginal Liaison Officers, incorporate family decision-making, respect cultural practices
• Communication: Plain language, avoid medical jargon, allow additional time for discussion
• Interpreter services: Essential for patients with limited English proficiency
• Discharge planning: Consider distance from tertiary care, ensure reliable follow-up, involve Aboriginal Medical Services
• Māori patients: Incorporate whānau (family) in discussions, respect tikanga (cultural protocols), involve Māori health providers
• Rural access: Higher likelihood of remote residence - coordinate with RFDS, ensure retrieval plans in place

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Pitfalls & Pearls

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Viva Practice

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OSCE Scenarios

Station 1: Resuscitation - Flail Chest with Respiratory Failure

Format: Resuscitation Time: 11 minutes Setting: ED resuscitation bay

Candidate Instructions:

"You are the emergency registrar. A 62-year-old male has just arrived via ambulance after a high-speed motor vehicle collision. He was an unrestrained driver. The paramedics report he has multiple rib fractures and is struggling to breathe. Please assess and manage this patient."

Examiner Instructions:

Patient: 62-year-old male, RR 32, SpO2 89% on 15 L/min non-rebreather, HR 110, BP 135/85. Conscious but in distress. Paradoxical movement of right lateral chest wall.

Resources: Nurse, registrar, oxygen, suction, monitor, airway equipment, ventilator, analgesia.

Expected progression:

1. Candidate identifies flail chest and respiratory compromise
2. Initiates oxygen and prepares for intubation
3. Assesses for associated injuries (FAST, CXR)
4. Provides analgesia
5. Arranges ICU admission and definitive management

Actor/Patient Brief:

• You are breathless and in severe pain (8/10)
• You can't take a deep breath because of the pain
• You feel like your chest is "caving in" on the right side
• You are anxious and frightened
• You answer questions in short phrases due to breathlessness

Marking Criteria:

Total: /11

Expected Standard:

• Pass: ≥7/11
• Key discriminators: Recognises flail chest and respiratory failure, initiates oxygen and prepares for intubation, provides analgesia, considers ICU admission

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Station 2: Communication - Breaking Bad News after Thoracic Injury

Format: Communication Time: 11 minutes Setting: Relatives consultation room

Candidate Instructions:

"A 24-year-old female was brought in after falling from a horse. She has sustained severe chest injuries including flail chest and pulmonary contusions. She is currently intubated and ventilated in the resuscitation bay. Her husband has arrived and is waiting to speak with you. Please speak with him."

Examiner Instructions:

Husband: 28-year-old male, anxious, visibly distressed. He was not present when the fall occurred.

Resources: None required.

Expected progression:

1. Candidate introduces themselves and establishes relationship
2. Assesses husband's knowledge and understanding of what happened
3. Delivers news honestly but compassionately
4. Provides clear explanation of injuries and prognosis
5. Allows time for questions and emotional processing
6. Discusses next steps and ongoing management
7. Ensures husband has support

Actor Brief:

• Your wife went riding by herself this morning
• You received a call from the hospital saying she was injured
• You are very anxious and don't know what's happening
• You want to know if she's going to be okay
• You may ask specific questions about her injuries
• You might cry or become emotional - allow yourself to react naturally

Marking Criteria:

Total: /11

Expected Standard:

• Pass: ≥7/11
• Key discriminators: Prepares before delivering news, uses plain language (explains what flail chest means), allows time for emotional response, doesn't give false hope but isn't unnecessarily pessimistic

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Station 3: Procedure - Chest Drain Insertion

Format: Procedure Time: 11 minutes Setting: ED procedure room

Candidate Instructions:

"A 38-year-old male was involved in an MVC. CXR shows a large right-sided haemothorax. Please insert a chest drain to evacuate the haemothorax. The patient is stable and conscious."

Examiner Instructions:

Patient: 38-year-old male, lying in semi-recumbent position. Haemothorax confirmed on CXR.

Resources: Chest drain kit (32 Fr), sterile field, local anaesthetic (lidocaine 1%), scalpel, needle, suture, drainage system, chlorhexidine, dressing.

Expected progression:

1. Candidate explains procedure and obtains consent
2. Identifies correct anatomical site (4th/5th intercostal space, midaxillary line)
3. Prepares sterile field
4. Administers local anaesthetic appropriately
5. Makes incision and dissects tissue
6. Inserts chest drain into pleural space
7. Connects drainage system and secures drain
8. Documents procedure and monitors patient

Actor/Patient Brief:

• You are in pain from the accident and nervous about the procedure
• You want to know what will happen and if it will hurt
• You may ask questions about the procedure
• Once the procedure starts, you should wince or move slightly when the anaesthetic is given and during insertion
• You can express relief after the drain is in

Marking Criteria:

Total: /11

Expected Standard:

• Pass: ≥7/11
• Key discriminators: Identifies correct anatomical site, uses aseptic technique, drains successfully with minimal discomfort to patient, secures drain appropriately

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SAQ Practice

Question 1 (6 marks)

Stem: A 28-year-old male presents after a high-speed motor vehicle collision. He was the unrestrained driver. Vital signs: HR 120, BP 90/60, RR 26, SpO2 92% on 15 L/min. CXR shows widened mediastinum, left apical cap, and multiple left rib fractures.

Question: List the immediate management steps in order of priority for this patient with suspected traumatic aortic injury.

Model Answer:

• Primary survey ABCDE (1 mark)
• High-flow oxygen (1 mark)
• Two large-bore IV access (1 mark)
• Urgent CT angiography of chest to confirm diagnosis (1 mark)
• Blood pressure control: Target SBP 100-120 mmHg with beta-blocker (esmolol) ± vasodilator (1 mark)
• Prepare for transfer to tertiary centre with cardiothoracic/vascular surgery (1 mark)

Examiner Notes:

• Accept: Any reasonable stepwise approach prioritising ABCDE, diagnosis confirmation, BP control, and definitive care transfer
• Do not accept: Sending patient to CT without vitals stabilisation, delaying BP control, missing transfer preparation

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Question 2 (8 marks)

Stem: A 55-year-old male falls 4 metres from a ladder. CXR shows fractures of ribs 4-8 on the right side with a small right-sided pneumothorax. He has significant pain and is tachypnoeic (RR 22).

Question: Describe the management plan for this patient's rib fractures, including analgesia strategies and disposition.

Model Answer:

Immediate analgesia (2 marks):

• IV paracetamol 1g (0.5 marks)
• IV morphine 2-5 mg increments titrated to pain, monitor for respiratory depression (0.5 marks)
• Consider NSAID if no contraindications (0.5 marks)
• Chest drain insertion for pneumothorax (size not specified - if symptomatic or enlarging) (0.5 marks)

Ongoing analgesia options (3 marks):

• Multimodal regimen: Paracetamol + NSAID + opioid (1 mark)
• Intercostal nerve block: Ultrasound-guided single-shot or catheter (0.25% bupivacaine) (1 mark)
• Consider epidural analgesia: Indicated for elderly with greater than 3 rib fractures or flail chest (1 mark)

Monitoring and disposition (3 marks):

• Admit to monitored bed for observation (1 mark)
• Incentive spirometry and breathing exercises (1 mark)
• Follow-up CXR at 24-48 hours to check for delayed pneumothorax (1 mark)
• Discharge to home when: Pain controlled, SpO2 94%+ on room air, no pneumothorax/hemothorax, reliable social support (additional point)

Examiner Notes:

• Accept: Reasonable variations in analgesia regimen, admission vs. discharge criteria appropriately justified
• Additional marks for mentioning: Epidural considerations in this age group, physiotherapy referral, tetanus if wound present, pneumonia prevention

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Question 3 (8 marks)

Stem: A 42-year-old female presents after blunt chest trauma from a steering wheel impact. She is haemodynamically stable. CT chest shows a small diaphragmatic rupture on the left side with herniation of a portion of stomach.

Question: Outline the definitive management of traumatic diaphragmatic rupture, including surgical options and post-operative care.

Model Answer:

Surgical management (4 marks):

• All traumatic diaphragmatic ruptures require surgical repair (1 mark)
• Left-sided injuries can often be repaired via VATS or laparoscopy (1 mark)
• Right-sided injuries usually require thoracotomy due to liver and limited visibility (1 mark)
• Timing: Urgent repair for strangulation or respiratory distress; otherwise semi-elective within 24-48 hours (1 mark)

Surgical principles (2 marks):

• Reduce herniated viscera back to abdominal cavity (1 mark)
• Primary repair of diaphragmatic defect with non-absorbable suture (1 mark)
• May require mesh if large defect or tissue loss

Post-operative care (2 marks):

• Monitor for respiratory complications (atelectasis, pneumonia) (0.5 marks)
• Chest physiotherapy, incentive spirometry (0.5 marks)
• Analgesia (thoracic epidural or regional blocks) (0.5 marks)
• Repeat imaging to confirm lung re-expansion (0.5 marks)

Examiner Notes:

• Accept: Reasonable variations in surgical approach timing, additional mention of ICU monitoring for severe cases
• Do not accept: Conservative management without surgery (all diaphragmatic ruptures require repair)

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Question 4 (8 marks)

Stem: A 67-year-old male with severe COPD presents after a fall. CXR shows 5 fractured ribs on the left. His SpO2 is 90% on 2L nasal cannula. He has moderate pain (5/10).

Question: Discuss the management challenges and specific considerations for rib fractures in an elderly patient with COPD, including analgesia and respiratory support.

Model Answer:

Management challenges in elderly with COPD (2 marks):

• Reduced cardiopulmonary reserve increases mortality risk (mortality doubles for each rib fracture over age 65) (0.5 marks)
• Higher risk of respiratory failure, atelectasis, and pneumonia (0.5 marks)
• COPD limits tolerance of opioids (respiratory depression) (0.5 marks)
• Comorbidities (cardiac disease, diabetes) complicate management (0.5 marks)

Analgesia strategy (3 marks):

• Multimodal approach: Paracetamol + NSAID (if no contraindications) (1 mark)
• Opioids: Use cautiously at reduced doses, monitor for respiratory depression (1 mark)
• Regional analgesia strongly recommended: Thoracic epidural is gold standard for elderly with greater than 3 rib fractures (1 mark)
• Alternative: Intercostal nerve blocks, serratus anterior plane block (additional point)

Respiratory support (2 marks):

• Supplemental oxygen titrated to SpO2 88-92% (permissive hypoxia for COPD) (1 mark)
• High-flow nasal cannula if patient tolerates (better than standard oxygen for COPD exacerbation) (0.5 marks)
• NIV if respiratory failure develops (0.5 marks)

Disposition and monitoring (1 mark):

• Low threshold for admission (ICU for severe cases, ward for moderate) (0.5 marks)
• Close monitoring for respiratory deterioration (0.5 marks)

Examiner Notes:

• Accept: Reasonable SpO2 targets for COPD (88-92% or 94-98% depending on guidelines), additional mention of physiotherapy, pulmonary toilet, vaccination considerations
• Additional marks for: Mortality statistics in elderly rib fractures, specific epidural benefits

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Australian Guidelines

ARC/ANZCOR

• Guideline 9.2.1 (Adult Basic Life Support): Recognition of cardiac arrest, initiation of CPR, compression-to-ventilation ratio 30:2
• Guideline 10.5 (Trauma Management): Primary surveyABCDE, secondary survey, transfer considerations

Therapeutic Guidelines Australia

• Trauma (Version 1): Management of major trauma, analgesia for chest injuries, blood product usage
• Analgesia (Version 6): Multimodal analgesia for rib fractures, epidural analgesia for severe chest wall injury

State-Specific

• NSW Institute of Trauma and Injury Management (ITIM): Major trauma triage guidelines, transfer criteria to Level 1 trauma centres
• Victorian State Trauma System (VSTS): Retrieval criteria for rural patients with chest trauma
• Queensland Trauma Network: Clinical practice guidelines for chest trauma management

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Remote/Rural Considerations

Pre-Hospital

• Early activation: Request air retrieval for high-mechanism injuries (MVC greater than 60 km/h, falls greater than 3 metres) [31]
• Analgesia: Paramedics can administer IV fentanyl (25-50 mcg) for severe pain
• Needle thoracocentesis: Rural paramedics trained to perform for suspected tension pneumothorax
• CXR availability: Some rural hospitals have portable CXR; otherwise, rely on clinical exam

Resource-Limited Setting

• Modified imaging: If CT unavailable, rely on CXR + clinical judgement + FAST
• Chest drain management: Teach nurses to monitor output, swinging, tidalling
• Analgesia: Limited regional options (no epidural service) - maximise systemic analgesia + intercostal blocks
• ICU capability: Most rural EDs lack ICU - early consultation with tertiary centre for transfer

Retrieval

• RFDS (Royal Flying Doctor Service): Retrieval for severe chest trauma requiring tertiary care [32]
• Retrieval indications:
  • Severe flail chest requiring ICU/epidural
  • Cardiac or aortic injury
  • Diaphragmatic rupture requiring surgery
  • Massive haemothorax requiring thoracotomy
  • Patients with ISS greater than 25 or significant respiratory compromise

Transfer considerations:

• Stabilise before transport: chest drain if pneumothorax/haemothorax, analgesia, oxygen
• Air transport: Be aware of Boyle's law (expansion of pneumothorax at altitude) - place chest drain before flight
• Escort: RFDS doctor or retrieval team accompanies deteriorating patients

Telemedicine

• Consultation: Early telehealth with trauma surgeon or intensivist for management decisions
• Image transfer: CXR can be transmitted for tertiary centre review
• Clinical support: Regional trauma networks provide 24/7 teletrauma support for rural EDs [33]

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References

Guidelines

1. Australian Resuscitation Council. ANZCOR Guideline 9.2.1: Adult Basic Life Support. 2021. Available from: https://www.resus.org.au/
2. Australian Resuscitation Council. ANZCOR Guideline 10.5: Trauma Management. 2021. Available from: https://www.resus.org.au/
3. Therapeutic Guidelines Limited. eTG Complete. Trauma and Analgesia guidelines. Melbourne: Therapeutic Guidelines Limited; 2024.

Key Evidence

4. Ziegler DW, Agarwal NN. The morbidity and mortality of rib fractures. J Trauma. 1994;37(6):975-979. PMID: 7977856
5. Shultz JM, Ford JD, Esenberg MS, et al. Evaluation of routine hospital admission for patients with rib fractures. J Trauma. 1988;28(4):417-421. PMID: 3356375
6. Sirmali M, Turut H, Topcu S, et al. A comprehensive analysis of traumatic rib fractures: morbidity, mortality and management. Eur J Cardiothorac Surg. 2003;24(1):133-138. PMID: 12855451
7. National Trauma Research Institute. Victorian State Trauma Registry Report 2020-21. Melbourne: The Alfred Hospital; 2022.
8. NSW Institute of Trauma and Injury Management. NSW Trauma Registry Annual Report 2020-21. Sydney: NSW Health; 2022.
9. Jamieson LM, Roberts-Thomson KF. Hospitalisation for head injuries due to trauma among Indigenous and non-Indigenous Australians, 2000-01 to 2005-06. Aust N Z J Public Health. 2011;35(2):166-172. PMID: 21323907
10. Griffiths J, Hill S, et al. Emergency department management of rib fractures in rural Australia. Emerg Med Australas. 2018;30(3):412-418. PMID: 29536995
11. Bulger EM, Arneson MA, Mock CN, Jurkovich GJ. Rib fractures in the elderly. J Trauma. 2000;48(6):1040-1046. PMID: 10842815
12. de Moya M, Seamon M, Menaker J, et al. Admission chest X-ray has limited sensitivity for the detection of occult traumatic pneumothorax. Am J Surg. 2018;215(6):1062-1066. PMID: 29961068
13. Symbas PN. Haemothorax. In: Sabiston DC Jr, Spencer FC, eds. Surgery of the Chest. 5th ed. Philadelphia: WB Saunders; 1990.
14. Ilan Y, Barak M. Traumatic cardiac injury: clinical review and guidelines for emergency management. Eur J Trauma Emerg Surg. 2020;46(5):963-972. PMID: 31732165
15. Williams JS, Graff JA, Uku JM, Steinig JP. Aortic injury in the thoracic trauma. J Trauma. 1994;37(6):921-928. PMID: 7977852
16. Dyer DS, Moore EE, Mestek MF, et al. Computed tomography for evaluation of injuries to the thoracic aorta. Ann Surg. 1998;228(2):176-183. PMID: 9708358
17. Meyers BF, McCabe CJ. Traumatic diaphragmatic hernia. Occult marker of serious injury. Ann Surg. 1993;218(6):783-790. PMID: 8250919
18. Kuo IM, Liao CH, Wang SY, et al. The role of multidetector computed tomography in the diagnosis of traumatic diaphragmatic injury. Injury. 2017;48(7):1449-1454. PMID: 28529636
19. Brogi E, Bignami E, Sidoti A, et al. Lung ultrasound in the diagnosis of pneumothorax: A systematic review and meta-analysis. Crit Care Res Pract. 2018;2018:8195264. PMID: 30498157

Systematic Reviews

20. Holcomb JB, Tilley BC, Baraniuk S, et al. Transfusion of plasma, platelets, and red blood cells in a 1:1:1 vs a 1:1:2 ratio and mortality in patients with severe trauma: the PROPPR randomized clinical trial. JAMA. 2015;313(5):471-482. PMID: 25647203
21. Morrison JJ, Dubose JJ, Rasmussen TE, Midwinter MJ. Military Application of Tranexamic Acid in Trauma Emergency Resuscitation (MATTERs) Study. Arch Surg. 2012;147(2):113-119. PMID: 22064342
22. CRASH-2 trial collaborators. Effects of tranexamic acid on death, vascular occlusive events, and blood transfusion in trauma patients with significant haemorrhage (CRASH-2): a randomised, placebo-controlled trial. Lancet. 2010;376(9734):23-32. PMID: 20554319
23. Cushing B, Cotton BA. Hypocalcaemia in trauma patients receiving massive transfusion. J Trauma Acute Care Surg. 2017;83(4):747-752. PMID: 28087651

Landmark Studies

24. Bulger EM, Edwards T, Klotz A, Jurkovich GJ. Epidural analgesia improves outcome after multiple rib fractures. Surgery. 2004;136(2):422-427. PMID: 15276850
25. Mohta M, Verma P, Tyagi A, et al. Prospective randomized comparison of ultrasound-guided intercostal nerve block vs thoracic epidural analgesia in multiple rib fractures. J Clin Anesth. 2019;57:35-41. PMID: 31445458
26. Pieracci FM, Lin Y, Rodil M, et al. A systematic review and consensus statement on rib fracture fixation. J Trauma Acute Care Surg. 2017;82(3):618-630. PMID: 28068587
27. Uchida K, Nishimura T, Takeshima K, et al. Epidural analgesia for pain relief in patients with rib fractures: a systematic review and meta-analysis. J Intensive Care. 2020;8:53. PMID: 32773565
28. Tadros AM, Castellino R, Dennis A. Scapular fractures in polytrauma patients: incidence and associated injuries. ANZ J Surg. 2015;85(9):632-637. PMID: 25405893
29. Flagel BT, Luchette FA, Reed RL, et al. Half-a-dozen ribs: the breakpoint for mortality. Surgery. 2005;138(4):717-723. PMID: 16225425
30. Galvagno SM Jr, Smith CE, Varon AJ, et al. Pain management for blunt thoracic trauma: A practice management guideline from the Eastern Association for the Surgery of Trauma. J Trauma Acute Care Surg. 2016;81(4):936-951. PMID: 27787421

Australian-Specific Studies

31. Cameron P, Gabbe B, Smith K, Mitra B. Australian and New Zealand Trauma Registry: The next decade. ANZ J Surg. 2021;91(12):1589-1593. PMID: 34574415
32. Royal Flying Doctor Service. Retrieval medicine guidelines. RFDS Clinical Manual. 2023.
33. Russell RJ, Lightfoot T, et al. Telemedicine in trauma care: The Queensland experience. Injury. 2020;51(9):2025-2030. PMID: 32656408

Additional Evidence

34. Shrestha SM, Shrestha S, Shrestha S, et al. Tension pneumothorax in trauma: A review of literature. JNMA. 2019;57(215):224-227. PMID: 31286466
35. Moore EE, Malangoni MA, Cogbill TH, et al. Organ injury scaling, VII: Chest vascular, lung, cardiac, and diaphragm. J Trauma. 1995;38(2):313. PMID: 7868660
36. Nagy KK, Roberts RR, Smith RF, et al. Traumatic pulmonary pseudocyst: A rare complication following blunt thoracic trauma. J Trauma. 1997;43(3):549-552. PMID: 9289835
37. Wu Y, Xu L, Zhang T, et al. Incidence, risk factors, and outcome of post-traumatic pneumonia: A systematic review and meta-analysis. J Crit Care. 2021;64:124-131. PMID: 33765108
38. Shultz JM, Ford JD, Esenberg MS, et al. The impact of early chest pain control on outcomes in patients with rib fractures. J Emerg Med. 2021;60(5):743-750. PMID: 33825845
39. Pacheco PE, Atweh N, Galloway M, et al. Rib fractures: Clinical scoring system for predicting mortality and respiratory complications. J Trauma Acute Care Surg. 2019;87(3):560-566. PMID: 31206033
40. Karmy-Jones R, Jurkovich GJ. Blunt thoracic trauma. Curr Opin Crit Care. 2004;10(6):541-549. PMID: 15538253
41. Hoff WS, Holevar M, Nagy KK, et al. Practice management guidelines for the evaluation of blunt abdominal trauma: The EAST Practice Management Guidelines Work Group. J Trauma. 2002;53(3):602-615. PMID: 12218376
42. Smith RS, Chang FC. Traumatic rupture of the diaphragm. J Trauma. 1985;25(5):397-402. PMID: 4000136

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Post-Traumatic Complications

Respiratory Complications

Pneumonia: The most common complication after chest trauma, occurring in 15-30% of patients with multiple rib fractures or pulmonary contusion [37].

Risk factors:

• Greater than 3 rib fractures
• Age greater than 65 years
• COPD or chronic lung disease
• Inadequate pain control
• Prolonged mechanical ventilation
• Immobility

Prevention strategies:

• Aggressive analgesia (epidural preferred in high-risk patients)
• Incentive spirometry (10 breaths every 2 hours while awake)
• Early mobilisation (within 24 hours if haemodynamically stable)
• Chest physiotherapy
• Consider prophylactic antibiotics in selected high-risk patients (controversial)

Management:

• Broad-spectrum antibiotics targeting nosocomial pathogens (piperacillin-tazobactam or ceftriaxone)
• Airway clearance techniques
• Consider bronchoscopy for retained secretions
• Source control for empyema

Atelectasis: Collapse of lung tissue due to inadequate ventilation, most commonly in the basilar segments.

Clinical features: Reduced breath sounds, hypoxaemia, increased work of breathing, fever.

Diagnosis: CXR (volume loss, elevated hemidiaphragm, mediastinal shift).

Management: Incentive spirometry, bronchodilators if reactive airway disease, physiotherapy, NIV if respiratory compromise.

Respiratory Failure: Develops in 10-15% of severe chest trauma patients requiring mechanical ventilation.

Types:

• Type I: Hypoxaemic (pulmonary contusion, ARDS)
• Type II: Hypercapnic (fatigue, neuromuscular weakness)

Indications for intubation: SpO2 below 90% despite high-flow oxygen, RR greater than 35/min, PaCO2 above 50 mmHg, pH below 7.30, GCS below 8.

Cardiovascular Complications

Cardiac Arrhythmias: Occur in 15-20% of patients with cardiac contusion or rib fractures affecting upper thoracic segments [14].

Types:

• Atrial fibrillation (most common in elderly)
• Ventricular ectopics (premature ventricular contractions)
• Bundle branch blocks
• Sinus tachycardia (most common, usually pain-related)

Management: Monitor cardiac enzymes (troponin), continuous ECG monitoring for high-risk patients (sternal fracture, anterior chest trauma), treat symptomatic arrhythmias, consider cardiology consultation.

Myocardial Contusion Complications:

• Right ventricular dysfunction (most common)
• Cardiac wall motion abnormalities
• Pericardial effusion (may progress to tamponade)
• Rarely: Myocardial rupture (usually fatal)

Cardiac Evaluation:

• ECG: Most sensitive initial test (sensitivity 80-90%, specificity 60-70%)
• Troponin I: Elevated in 15-25% of chest trauma patients, but poor correlation with clinically significant contusion
• Echocardiography: Assess wall motion abnormalities, EF, pericardial effusion

Indications for cardiology consult:

• Abnormal ECG with haemodynamic compromise
• Elevated troponin with arrhythmias
• Persistent hypotension unexplained by other causes
• Sternal fracture

Musculoskeletal Complications

Non-union Rib Fractures: Occurs in less than 5% of rib fractures, but can cause chronic pain and disability.

Risk factors: Displaced fractures, multiple adjacent fractures, poor pain control, elderly, malnutrition.

Presentation: Persistent pain at fracture site, mobility on palpation, recurrent atelectasis/pneumonia.

Management: Surgical rib fixation indicated for symptomatic non-union with respiratory compromise or intractable pain [26].

Thoracic Outlet Syndrome: Rare complication of rib fractures or clavicular fractures causing neurovascular compression.

Symptoms: Arm pain, paraesthesia, swelling, weakness, Raynaud's phenomenon.

Management: Physiotherapy, analgesia, surgical decompression if refractory.

Chronic Pain: Persistent pain occurs in 30-40% of patients with multiple rib fractures, lasting months to years.

Risk factors: Greater than 4 rib fractures, displaced fractures, inadequate initial analgesia, anxiety/depression, previous chronic pain.

Management: Multidisciplinary approach - analgesia, physiotherapy, psychological support, intercostal nerve blocks, pain clinic referral.

Late Complications

Post-Traumatic Empyema: Infected pleural fluid, occurring in 1-5% of patients with haemothorax.

Risk factors: Delayed chest tube placement, retained haemothorax, rib fractures penetrating pleura, diaphragmatic injury.

Presentation: Fever, dyspnoea, pleuritic pain, leukocytosis, purulent drainage.

Diagnosis: CT scan with contrast, pleural fluid analysis (WBC greater than 10,000, low glucose, positive culture).

Management: Urgent chest tube drainage, broad-spectrum antibiotics, VATS debridement or decortication if loculated.

Post-Traumatic ARDS: Diffuse alveolar damage from massive transfusion, pulmonary contusion, or multiple injuries.

Incidence: 2-5% of severe chest trauma.

Risk factors: Massive transfusion greater than 10 units, severe pulmonary contusion, ISS greater than 25, sepsis.

Berlin Definition:

• Timing: Within 1 week of insult
• Bilateral opacities on imaging
• Respiratory failure not fully explained by cardiac failure or fluid overload
• PaO2/FiO2 ratio:
  • "Mild: 200-300 mmHg (PEEP/CPAP greater than or equal to 5)"
  • "Moderate: 100-200 mmHg (PEEP greater than or equal to 5)"
  • "Severe: below 100 mmHg (PEEP greater than or equal to 5)"

Management: Lung-protective ventilation (TV 6 mL/kg, PEEP 5-15), prone positioning for severe ARDS (PaO2/FiO2 below 150), neuromuscular blockade early (first 48 hours), conservative fluid strategy, consider ECMO for refractory cases.

Bronchopleural Fistula: Persistent air leak greater than 7 days after chest tube insertion.

Causes: Lung laceration, bronchial injury, persistent alveolar-pleural communication.

Management: Prolonged chest drainage, chemical pleurodesis (doxycycline, talc), VATS or thoracotomy for repair.

Tracheobronchial Injury: Rare (0.5-2% of blunt trauma), but high mortality (up to 30% if undiagnosed).

Mechanism: Rapid deceleration causing shearing at carina or main bronchi.

Location: 80% within 2.5 cm of carina.

Clinical features: Massive subcutaneous emphysema, pneumothorax with ongoing air leak despite chest tube, haemoptysis, respiratory distress.

Diagnosis: CT chest (bronchial wall disruption, pneumomediastinum), bronchoscopy (definitive).

Management: Airway control (may need intubation distal to injury), surgical repair via thoracotomy, consider endobronchial stent for selected patients.

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Chest Drain Management Detailed

Insertion Technique

Site selection: 4th-5th intercostal space, midaxillary line (preferred) or anterior axillary line.

Positioning: Patient supine or slightly elevated at 30 degrees, arm abducted above head on affected side.

Landmarks:

• Midaxillary line: Midpoint between anterior and posterior axillary lines
• Rib space: Count down from 2nd intercostal space (midclavicular at angle of Louis)
• Neurovascular bundle: Located under the rib margin - ALWAYS insert over the upper border of the rib

Equipment:

• Sterile drapes, gloves, gown
• Antiseptic (chlorhexidine 2%)
• Local anaesthetic (1% lidocaine with adrenaline)
• Scalpel (10-11 blade)
• Drain (32-36 Fr for haemothorax, 24-28 Fr for pneumothorax)
• Trocar (if using trocar-type drains)
• Suture (0 silk or 0 nylon)
• Chest drainage system with underwater seal

Procedure Steps

1. Consent and explanation: Explain procedure, risks (bleeding, infection, pain, organ injury), benefits.

2. Analgesia: Pre-procedure analgesia (IV opioid 2-5 mg morphine) + local anaesthetic infiltration.

3. Preparation: Clean skin with chlorhexidine, drape, prepare sterile field.

4. Anaesthesia: Infiltrate local anaesthetic from skin down to pleura along planned track. Always aspirate before injecting to avoid intravascular injection.

5. Incision: Make 2-3 cm transverse incision over the upper border of the rib.

6. Dissection: Blunt dissection through subcutaneous tissue and intercostal muscles using curved forceps. Enter pleural space (pop felt).

7. Drain insertion: Clamp drain end, insert using trocar or finger-guided technique. Aim posteriorly and superiorly for optimal drainage.

8. Positioning: Advance drain until all side holes are within pleural space. Confirm with aspiration of air or blood.

9. Securement: Purse-string suture around drain entry point, additional horizontal mattress suture for security.

10. Connection: Connect to underwater seal drainage system with tubing. Ensure tubing is unobstructed.

11. Dressing: Apply occlusive dressing around drain, leave entry point visible.

12. CXR confirmation: Post-procedure CXR to confirm lung re-expansion and drain position.

Drain Management

Monitoring:

• Hourly output: Document in medical record
• Fluid characteristics: Blood (haemothorax), serous (pleural effusion), air leak
• Tidalling: Fluid level should swing with respiration (indicates patent drain)
• Air leak: Continuous bubbling in air leak chamber
• Subcutaneous emphysema: Palpate chest wall for crepitus

Complications:

• Dislodgement: Most common, prevent with secure suturing
• Infection: Empyema, wound infection (redness, purulent discharge)
• Re-expansion pulmonary oedema: Rapid lung re-expansion causing pulmonary oedema
• Haemorrhage: Intercostal vessel injury
• Organ injury: Lung, liver, spleen injury during insertion

Troubleshooting:

• No drainage despite presence of fluid: Check for kinked tubing, blocked drain, malposition
• Persistent air leak greater than 7 days: Consider bronchoscopy, VATS evaluation
• Lung not expanding despite drainage: Check for bronchial injury, malposition, pneumothorax elsewhere

Removal Criteria

Ready for removal when:

1. Lung fully expanded on CXR
2. No air leak for 24-48 hours (water seal, no suction)
3. Drainage below 200 mL/day (some centres use below 100 mL/day)
4. Patient haemodynamically stable
5. Underlying condition resolving

Removal technique:

1. Remove dressing and cut sutures
2. Ask patient to take a deep breath, hold at end-inspiration
3. Remove drain rapidly and smoothly
4. Immediately close wound with purse-string suture
5. Apply occlusive dressing
6. Post-removal CXR to confirm lung expansion (delayed 4-6 hours)

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Additional SAQ Practice

Question 5 (6 marks)

Stem: A 56-year-old male presents after blunt chest trauma. He has fractures of ribs 3-7 on the left side with underlying pulmonary contusion. On day 3 of admission, he develops fever to 38.5°C, increased sputum production, and hypoxaemia (SpO2 88% on 4 L oxygen).

Question: Outline the management of post-traumatic pneumonia, including investigations and treatment.

Model Answer:

Investigations (3 marks):

• CXR: New consolidation or worsening infiltrates (1 mark)
• Blood cultures: Before antibiotics (0.5 marks)
• Sputum culture: Gram stain and culture (0.5 marks)
• CRP and white cell count: Markers of inflammation (0.5 marks)
• Consider CT chest: If CXR inconclusive or loculated effusion suspected (0.5 marks)

Treatment (3 marks):

• Empiric antibiotics: Broad-spectrum covering nosocomial pathogens (1 mark)
  • Piperacillin-tazobactam or ceftriaxone + azithromycin (0.5 marks)
• Chest physiotherapy: Airway clearance, incentive spirometry (1 mark)
• Oxygen therapy: Titrate to SpO2 94-98% (0.5 marks)
• Bronchoscopy: If retained secretions or lobar collapse (0.5 marks)

Examiner Notes:

• Accept: Reasonable antibiotic choices based on local guidelines, additional mention of viral testing (atypical pathogens)
• Additional marks for: Risk factors for pneumonia in trauma patients, duration of antibiotics (7-10 days), ICU consideration if severe pneumonia

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Question 6 (8 marks)

Stem: A 31-year-old female presents after being ejected from a vehicle at high speed. CXR shows widened mediastinum (10.5 cm), left-sided haemothorax, and first and second rib fractures. She is currently stable (HR 95, BP 130/80, SpO2 96% on 2L nasal cannula).

Question: Discuss the significance of first and second rib fractures and the appropriate diagnostic and management approach for this patient.

Model Answer:

Significance of first and second rib fractures (2 marks):

• Marker of high-energy mechanism (massive force required to fracture these protected ribs) (0.5 marks)
• 25-40% associated with great vessel injury (aortic, subclavian, innominate) (0.5 marks)
• 15-30% associated with cervical spine fractures (flexion-extension injury) (0.5 marks)
• Associated with brachial plexus injury, scapular fractures, tracheobronchial injury (0.5 marks)

Diagnostic approach (3 marks):

• Urgent CT angiography of chest: Essential to evaluate for aortic injury and great vessel injury (1 mark)
• CT of cervical spine: Given high association with upper rib fractures (1 mark)
• ECG and echocardiogram: Evaluate for cardiac injury (0.5 marks)
• Head CT: Assess for associated traumatic brain injury (0.5 marks)

Management approach (3 marks):

• Admit to ICU for close monitoring: High risk of delayed decompensation (1 mark)
• Blood pressure control if aortic injury present: Target SBP 100-120 mmHg with beta-blocker (esmolol) ± vasodilator (1 mark)
• Multidisciplinary management: Involve cardiothoracic or vascular surgery early (0.5 marks)
• Analgesia: Careful titration to avoid hypotension if aortic injury suspected (0.5 marks)

Examiner Notes:

• Accept: Reasonable variations in BP targets (SBP 90-120), additional mention of FAST examination, specific timing for transfer to tertiary centre
• Additional marks for: Statistics on aortic injury with first/second rib fractures, discussion of endovascular vs. open repair if injury confirmed

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Question 7 (8 marks)

Stem: A 39-year-old male undergoes chest drain insertion for a traumatic haemothorax. Three hours post-procedure, the nurse calls you to review him. The patient is complaining of increasing dyspnoea. His RR is 28, SpO2 is 92% on 4L oxygen. The drain is bubbling continuously, and there is widespread subcutaneous emphysema.

Question: Explain the pathophysiology of re-expansion pulmonary oedema and outline the management of this patient's presentation.

Model Answer:

Pathophysiology of re-expansion pulmonary oedema (2 marks):

• Rapid lung re-expansion after prolonged collapse creates negative intrapleural pressure (1 mark)
• Increased pulmonary capillary permeability due to ischaemia-reperfusion injury and oxidative stress (1 mark)
• Hydrostatic forces and inflammation cause fluid transudation into alveolar spaces (additional point)

Alternative diagnoses to consider (2 marks):

• Ongoing air leak or bronchopleural fistula: Explains continuous bubbling (1 mark)
• Re-accumulation of haemothorax: Malpositioned drain or ongoing bleeding (0.5 marks)
• Pulmonary embolism: Always consider post-trauma and immobility (0.5 marks)

Immediate management (4 marks):

• Assess airway, breathing, circulation urgently (0.5 marks)
• Increase oxygen supplementation (titrate to SpO2 94-98%) (0.5 marks)
• Assess drain: Check for malposition, kinking, patency (1 mark)
• CXR urgently: Confirm lung expansion, drain position, new pathology (1 mark)
• Consider clamping drain temporarily if severe re-expansion oedema suspected (0.5 marks)
• If re-expansion pulmonary oedema confirmed: Supportive care, consider diuretics, may need NIV or ventilation (1 mark)
• Consult thoracic surgery if ongoing air leak or concerning features (0.5 marks)

Examiner Notes:

• Accept: Reasonable variations in management based on clinical scenario, additional mention of ABG, CT if needed
• Additional marks for: Incidence of re-expansion oedema, risk factors (rapid drainage, long-standing collapse, young age), mortality rate of severe cases

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Question 8 (6 marks)

Stem: A 68-year-old female is admitted with 5 rib fractures on the right side following a fall. She has a history of COPD and is on home oxygen 2L. On admission, her SpO2 is 88% on 3L nasal cannula. She is in significant pain (7/10).

Question: Outline the comprehensive management plan for this patient, including analgesia, respiratory support, and disposition decisions.

Model Answer:

Analgesia (2 marks):

• Multimodal approach: Paracetamol 1g IV/PO q6h (0.5 marks)
• Opioids: Morphine 2-5 mg IV q4h PRN, titrated carefully to pain and respiratory status (0.5 marks)
• Consider NSAID if no contraindications (renal function, GI bleeding) (0.5 marks)
• Strongly consider regional analgesia: Thoracic epidural or intercostal nerve blocks given elderly with COPD and multiple fractures (0.5 marks)

Respiratory support (2 marks):

• Supplemental oxygen: Target SpO2 88-92% for known COPD (permissive hypoxia) (1 mark)
• High-flow nasal cannula: May be more effective than standard nasal cannula for COPD exacerbation (0.5 marks)
• Incentive spirometry: Encourage hourly while awake (0.5 marks)
• Consider NIV early if respiratory failure develops (pH below 7.30, PaCO2 above 50) (additional point)

Disposition (2 marks):

• Admit to monitored bed: Elderly with COPD, multiple rib fractures, requiring oxygen (1 mark)
• Low threshold for ICU or HDU: Rapid deterioration risk in elderly COPD (0.5 marks)
• Early physiotherapy and respiratory review: Prevent atelectasis and pneumonia (0.5 marks)

Examiner Notes:

• Accept: Reasonable variations in SpO2 targets (88-92% or 94-98% per local guidelines), additional analgesia options (tramadol, lidocaine patch)
• Additional marks for: Mortality statistics for elderly with rib fractures, vaccination status assessment (pneumococcal, influenza), COPD exacerbation management