Galeazzi Fracture-Dislocation

1. Clinical Overview

Summary

A Galeazzi fracture-dislocation is a fracture of the distal third of the radius (typically within 7.5 cm of the radiocarpal joint) with an associated dislocation or subluxation of the distal radioulnar joint (DRUJ). First described by the Italian surgeon Riccardo Galeazzi in 1934, this injury pattern is classically termed a "fracture of necessity" because of its inherent instability and universal requirement for surgical fixation in adults. [1]

The injury mechanism typically involves axial loading with the forearm in pronation, such as occurs during a fall onto an outstretched hand (FOOSH) or direct impact to the dorsal forearm. The radius fails at the junction of its middle and distal thirds, and as the proximal fragment displaces, radial shortening occurs. This shortening disrupts the normal length relationship between the radius and ulna, creating tension on the interosseous membrane (IOM) and triangular fibrocartilage complex (TFCC), ultimately leading to DRUJ disruption. [2,3]

The critical pathoanatomy involves rupture of the TFCC and often the dorsal and volar radioulnar ligaments, allowing the ulnar head to dislocate dorsally (most common) or, less frequently, volarly. The characteristic "piano key sign" results from this dorsal prominence of the unstable ulnar head. Failure to recognize and appropriately treat the DRUJ injury results in chronic pain, instability, and severe restriction of forearm rotation—outcomes that can be devastating for functional hand use. [4]

Key Facts

• Mnemonic: GRIMUS
  • Galeazzi: Radius fracture, Inferior (Distal) dislocation
  • Monteggia: Ulna fracture, Superior (Proximal) dislocation
• Alternative Mnemonic: MUGR (Monteggia = Ulna, Galeazzi = Radius)
• Pathophysiology: Radius shortens → Ulna becomes relatively long → TFCC and IOM tear → Ulnar head dislocates
• Stability Determinant: Distance from fracture to DRUJ. Fractures within 7.5 cm of the radiocarpal joint have high DRUJ injury risk due to IOM disruption. [5]
• Eponym Origin: Named after Riccardo Galeazzi (1866-1952), who published his series in 1934
• Alternative Name: "Piedmont fracture" (named after the Piedmont Orthopaedic Society in the 1940s)

Clinical Pearls

"The Piano Key Sign": In a Galeazzi fracture, the ulnar head is prominent dorsally at the wrist. When you press it down, it springs back up like a piano key because the stabilizing ligaments (TFCC and radioulnar ligaments) are torn. This sign indicates DRUJ instability and must be assessed both clinically and intraoperatively.

"Reduce the Radius, Reduce the Joints": Because the DRUJ dislocation is driven by radial shortening and angulation, anatomical plating of the radius to restore length and alignment often spontaneously reduces the DRUJ. However, this must always be verified intraoperatively with stress testing. [6]

"Cast in Supination": If immobilization is required (post-operative or in unstable DRUJ), the forearm must be positioned in supination. Pronation forces the radius to cross over the ulna, which displaces the fracture and dislocates the DRUJ. Supination makes the bones parallel and tightens the IOM, providing stability. [7]

"The 7.5 cm Rule": Fractures occurring within 7.5 cm (approximately 3 inches) of the radiocarpal joint are at highest risk for DRUJ instability because the distal portion of the IOM is disrupted. This measurement should be made on preoperative radiographs to predict instability. [5]

"Always Image Both Joints": The fundamental rule in forearm fractures—every forearm X-ray must include both the elbow AND wrist joints. Failure to follow this rule results in missed DRUJ injuries and poor outcomes.

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2. Epidemiology

Demographics

• Incidence: Accounts for 3-7% of all adult forearm fractures. [8]
• Age Distribution: Bimodal pattern
  • Young males (ages 20-40): High-energy trauma (sports, road traffic accidents, falls from height)
  • Elderly females (ages > 60): Low-energy falls related to osteoporosis
• Gender: Male predominance (Male:Female ratio approximately 3:1 in most series) [8]
• Laterality: No significant difference between dominant and non-dominant limbs
• Seasonal Variation: Some studies show increased incidence in winter months (falls on ice) and summer (sports injuries)

Risk Factors

Patient Factors

• Osteoporosis/Osteopenia: Increases risk in elderly population
• Previous Forearm Fracture: Altered biomechanics may predispose to injury
• Neuromuscular Disorders: Conditions affecting balance and coordination

Injury Factors

• High-Energy Trauma: Motor vehicle collisions, falls from height
• Sports: Contact sports (rugby, American football), cycling, skiing
• Occupational: Construction workers, manual laborers
• Mechanism: FOOSH with pronated forearm and direct blows to dorsal forearm

Associated Injuries

• Ipsilateral Upper Limb Injuries: 15-25% have other injuries (scaphoid fracture, distal radius fracture, elbow injuries) [9]
• Open Fractures: Occur in 5-10% of cases, usually from high-energy mechanisms
• Neurovascular Injuries: Anterior interosseous nerve (AIN) injury in 2-5%, ulnar nerve injury rare
• Compartment Syndrome: Reported in 2-3% of closed injuries, higher in polytrauma [10]

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3. Pathophysiology

Anatomy

Radius

• Structure: The radius is a curved bone that bows laterally (radial bow). This natural curvature is critical for pronation and supination.
• Length: Average adult radius length is 25-27 cm
• Blood Supply: Nutrient artery enters at mid-diaphysis; rich periosteal supply distally
• Muscle Attachments:
  • Pronator teres (mid-shaft)
  • Pronator quadratus (distal)
  • Brachioradialis (distal-lateral)
  • Supinator (proximal)

Distal Radioulnar Joint (DRUJ)

The DRUJ is a complex pivot joint that allows 150-180 degrees of combined pronation-supination. Stability depends on both osseous and soft tissue constraints:

Osseous Stability

• Sigmoid Notch: Shallow concavity on medial distal radius that articulates with ulnar head
• Ulnar Seat: The articular surface of the ulnar head (approximately 270-degree arc)
• Intrinsic Stability: The sigmoid notch provides only 20% of DRUJ stability due to its shallow morphology [11]

Soft Tissue Stabilizers

• Triangular Fibrocartilage Complex (TFCC): PRIMARY stabilizer
  • Central articular disc
  • Dorsal and volar radioulnar ligaments (most important)
  • Meniscus homologue
  • Ulnocarpal ligaments
  • Extensor carpi ulnaris (ECU) subsheath
• Interosseous Membrane (IOM): Secondary stabilizer
  • Central band (most important): Runs obliquely from radius to ulna
  • Provides 71% of longitudinal forearm stability [12]
  • Prevents proximal migration of radius
• Pronator Quadratus: Dynamic stabilizer
• Extensor Carpi Ulnaris: Provides dynamic dorsal stability

The Critical Zone

Fractures within 7.5 cm of the radiocarpal joint are considered high-risk because:

• The distal attachment of the central band of the IOM is disrupted
• The TFCC is always injured
• The restraint against radial shortening is lost
• Even anatomical reduction may not restore DRUJ stability without soft tissue healing [5]

Mechanism of Injury

Typical Mechanism

1. Initial Force: Fall onto outstretched hand with forearm in pronation and wrist in ulnar deviation
2. Energy Transfer: Axial load transmitted through carpus to distal radius
3. Radius Failure: Bone fails at junction of middle and distal thirds (stress concentration point)
4. Radial Displacement:
   • Proximal fragment: Displaced dorsally and proximally by brachioradialis
   • Distal fragment: Held by pronator quadratus, may angulate volarly
5. Soft Tissue Disruption:
   • IOM central band tears (permits shortening)
   • TFCC tears (dorsal and volar radioulnar ligaments)
   • Pronator quadratus often torn or stripped
6. DRUJ Disruption: Loss of constraint allows ulnar head to dislocate (typically dorsally due to disruption of dorsal radioulnar ligament)

Alternative Mechanism

• Direct Blow: Impact to dorsal forearm can cause radius fracture with volar DRUJ dislocation (less common)
• Rotational Injury: Hyperpronation with fixed hand can produce similar pattern

Biomechanics of Instability

The deforming forces that make this injury "irreducible" by closed means include:

1. Brachioradialis: Pulls proximal fragment proximally and laterally (shortening)
2. Pronator Quadratus: Pronates distal fragment
3. Weight of Hand: Creates apex volar angulation
4. Interposed Soft Tissues: Periosteum, extensor tendons, and TFCC remnants can block reduction

These forces explain the near-universal failure rate (> 90% in historical series) of closed reduction and casting in adults. [13]

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4. Classification Systems

Hughston Classification (1957)

Based on location and associated injuries:

• Type I: Fracture at junction of middle and distal thirds with dorsal DRUJ dislocation (most common)
• Type II: Fracture at same location with volar DRUJ dislocation (rare, less than 5%)

Rettig-Raskin Classification (2001)

Treatment-oriented classification based on DRUJ reducibility: [14]

• Type 1: DRUJ reduces and remains stable after radius fixation → No additional treatment
• Type 2: DRUJ reduces but is unstable → Requires immobilization in supination 4-6 weeks
• Type 3: DRUJ irreducible → Requires open reduction ± DRUJ transfixion

This classification is applied intraoperatively after radius fixation and guides subsequent management.

AO/OTA Classification

Galeazzi fractures fall under:

• 22-A3.1: Simple diaphyseal fracture of radius with DRUJ injury

Distance-Based Classification

• Proximal Third: Low risk for DRUJ instability
• Middle Third: Moderate risk
• Distal Third (less than 7.5 cm from radiocarpal joint): High risk—these are "true" Galeazzi fractures [5]

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5. Clinical Presentation

History

Chief Complaint

• Severe pain in forearm and wrist
• Inability to use hand/wrist
• Visible deformity

Mechanism

• Fall onto outstretched hand (most common)
• Direct blow to forearm
• Motor vehicle collision
• Sports injury

Important Questions

• Time of injury: Important for planning definitive management
• Hand dominance: Affects rehabilitation goals
• Occupation: Manual laborers may require longer time off work
• Previous injuries: Prior forearm fractures alter biomechanics
• Neurovascular symptoms: Paresthesias, numbness, weakness

Symptoms

• Pain: Severe, localized to distal forearm and wrist
• Deformity: Visible angulation and/or shortening of forearm
• Swelling: Rapid onset, may be dramatic
• Loss of Function: Unable to pronate/supinate, grip strength severely reduced
• Neurological: May report numbness in median or ulnar nerve distribution

Physical Examination

Inspection

• Deformity:
  • Angulation of forearm (typically apex volar)
  • Shortening compared to contralateral limb
  • Dorsal prominence at wrist (ulnar head)
• Swelling: Diffuse forearm swelling, often tense
• Skin:
  • Assess for open wounds, abrasions, contusions
  • Skin tenting over ulnar head (risk for skin necrosis)
  • Fracture blisters (sign of significant swelling)
• Ecchymosis: May develop over 24-48 hours

Palpation

• Tenderness:
  • Point tenderness over radius fracture site
  • Tenderness at DRUJ
• Piano Key Sign:
  • Dorsal ulnar head prominence
  • Reducible with pressure but springs back when released
  • Indicates DRUJ instability
• Crepitus: May be palpable at fracture site

Neurovascular Assessment (CRITICAL)

Arterial Assessment

• Radial Pulse: Palpate at wrist—should be present and equal to contralateral
• Ulnar Pulse: May be difficult to palpate but assess if possible
• Capillary Refill: Should be less than 2 seconds in all digits
• Hand Perfusion: Color, temperature, pulse oximetry if available

Venous Assessment

• Hand Swelling: Excessive swelling may indicate venous obstruction
• Venous Congestion: Purple discoloration of fingers

Neurological Assessment

Median Nerve:

• Motor: Thumb opposition, thenar muscle bulk
• Sensory: Volar thumb, index, middle fingers, radial half of ring finger

Anterior Interosseous Nerve (AIN) [Branch of Median—commonly injured]:

• Motor: "OK Sign" test
  • Ask patient to make circle with thumb and index finger
  • Normal: Can make tight circle (flexor pollicis longus + flexor digitorum profundus to index)
  • Abnormal: Cannot make tight circle (often makes teardrop shape)
• No Sensory Component: Pure motor nerve

Ulnar Nerve:

• Motor: Finger abduction (intrinsics), Froment's sign (adductor pollicis)
• Sensory: Small finger and ulnar half of ring finger

Radial Nerve (rarely injured):

• Motor: Wrist extension, thumb extension, finger extension at MCPs
• Sensory: First dorsal web space

Compartment Assessment

Clinical Signs of Evolving Compartment Syndrome:

• Pain: Disproportionate to injury, progressive, not relieved by analgesia
• Pain on Passive Stretch: Most sensitive early sign
  • Volar compartment: Pain with passive finger/wrist extension
  • Dorsal compartment: Pain with passive finger/wrist flexion
• Paresthesias: Typically late finding
• Pallor/Pulselessness: Very late findings—do NOT wait for these
• Paralysis: Very late finding—irreversible muscle damage
• Pressure: Tense, firm compartments on palpation

Compartment Pressure Measurement: Consider if clinical concern

• Normal: less than 10 mmHg
• At-risk: > 20 mmHg
• Diagnostic: > 30 mmHg absolute OR within 30 mmHg of diastolic BP (ΔP less than 30)

Range of Motion

• Active ROM: Usually impossible due to pain
• Passive ROM:
  • Should NOT be assessed acutely (risk of further soft tissue injury)
  • Gentle passive finger ROM to assess compartments

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6. Investigations

Imaging

Plain Radiographs (MANDATORY)

Essential Views:

• AP Forearm: Must include wrist and elbow
• Lateral Forearm: Must include wrist and elbow
• AP Wrist: Dedicated view to assess DRUJ
• Lateral Wrist: Dedicated view to assess DRUJ displacement

Radiographic Signs of Galeazzi Fracture:

On AP View:

• Radius fracture at distal third
• Radial shortening (compare to ulna)
• Widening of DRUJ space (> 5 mm is abnormal)
• Ulnar styloid fracture (associated in 50% of cases) [15]

On Lateral View:

• Dorsal or volar displacement of radius fracture
• Ulnar head displaced dorsally (most common) or volarly relative to radius
• Disruption of normal DRUJ alignment
• Normal DRUJ: Ulnar head centered in sigmoid notch

Radial Bow Measurement:

• Measured on AP view
• Line drawn from radial styloid to bicipital tuberosity
• Maximum perpendicular distance to radial shaft
• Normal: 15 mm (range 10-20 mm)
• Loss of radial bow indicates malreduction

Computed Tomography (CT)

Indications:

• Intra-articular extension (distal radius or DRUJ)
• Comminution assessment for preoperative planning
• Chronic cases with arthrosis
• Assessment of DRUJ incongruity
• Failed initial treatment with persistent instability

Not Routinely Required: Most acute Galeazzi fractures are managed based on plain films alone

Magnetic Resonance Imaging (MRI)

Indications:

• Chronic DRUJ instability to assess TFCC
• Preoperative planning for TFCC repair
• Suspected interosseous ligament injury
• NOT required acutely in most cases

Ultrasound

• Limited role
• Can assess TFCC integrity in experienced hands
• May be useful for pediatric cases to avoid radiation

Laboratory Investigations

Preoperative Workup

• Complete Blood Count (CBC): Baseline hemoglobin, exclude infection if open
• Coagulation Profile: If on anticoagulation or bleeding history
• Group and Save: Routine for operative cases
• Metabolic Panel: Especially in elderly patients

Compartment Syndrome Workup

• Creatine Kinase (CK): Elevated if muscle necrosis (not diagnostic)
• Myoglobin: Urine myoglobin if rhabdomyolysis suspected
• Lactate: Marker of tissue ischemia
• Renal Function: Monitor if rhabdomyolysis develops

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7. Management Algorithm

                GALEAZZI FRACTURE
                       ↓
            EMERGENCY ASSESSMENT
              ┌─────────┴─────────┐
          CLOSED                  OPEN
              ↓                     ↓
       NEUROVASCULAR          IMMEDIATE OR
         INTACT?                  ↓
         ┌──┴──┐            URGENT SURGERY
        YES    NO          (Debridement + ORIF)
         ↓      ↓
    COMPARTMENT  VASCULAR
      SYNDROME?   INJURY
         ↓          ↓
        NO      IMMEDIATE
         ↓      EXPLORATION
    CLOSED         ↓
    REDUCTION   VASCULAR
      SPLINT     REPAIR
         ↓          ↓
    CONSENT &  FRACTURE
    PLANNING   FIXATION
         ↓
    ════════════════════════════════
         OPERATIVE MANAGEMENT
    ════════════════════════════════
              ↓
         ORIF RADIUS
    (3.5mm Volar Plate/Dorsal Plate)
         ↓
    RESTORE LENGTH
    RESTORE RADIAL BOW
    RESTORE ROTATION
         ↓
    FLUOROSCOPIC CONFIRMATION
         ↓
    ASSESS DRUJ STABILITY
    (Stress Testing Intraop)
         ┌────────┴────────┐
     STABLE            UNSTABLE
         ↓                  ↓
    NO ADDITIONAL    STILL REDUCIBLE?
     TREATMENT       ┌──────┴──────┐
         ↓          YES            NO
    EARLY ROM    TRANSFIXION    OPEN DRUJ
    (2 weeks)     K-WIRES       REDUCTION
                  (4-6 wks)          ↓
                      ↓          DRUJ REPAIR
                SUPINATION    ± TFCC REPAIR
                  CAST             ↓
                (6 weeks)     K-WIRE FIXATION
                      ↓              ↓
                 REMOVE WIRES   IMMOBILIZE
                      ↓          6 WEEKS
                ══════════════════════
                  REHABILITATION
                ══════════════════════

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8. Management Protocols

1. Emergency Department Management

Initial Assessment (ATLS Protocol if Polytrauma)

1. Primary Survey: Airway, Breathing, Circulation
2. Secondary Survey: Identify all injuries
3. Focused Forearm Assessment:
   • Neurovascular status (document thoroughly)
   • Compartment assessment
   • Skin integrity (open vs closed)
   • Associated injuries

Immediate Management

• Analgesia: Adequate pain control (opioids usually required)
• Splinting:
  • Remove jewelry immediately
  • Sugar-tong splint (prevents pronation/supination)
  • Position: Forearm in neutral to slight supination, elbow at 90°
  • Padding: Adequate padding at bony prominences
  • Do NOT attempt closed reduction of DRUJ—high failure rate and risk of neurovascular injury
• Ice and Elevation: Reduce swelling
• Tetanus Prophylaxis: If open fracture
• Antibiotics: If open fracture (cefazolin ± gentamicin based on Gustilo classification)
• Photography: Document open wounds

Imaging

• AP and lateral forearm (including wrist and elbow)
• Dedicated wrist views if DRUJ unclear

Orthopaedic Referral

• Immediate: If open fracture, vascular injury, compartment syndrome
• Urgent (within 24 hours): All other Galeazzi fractures
• Consent for Surgery: All adults require ORIF

2. Surgical Fixation (The Gold Standard for Adults)

Preoperative Planning

Surgical Timing:

• Emergency (less than 6 hours): Open fractures, vascular injury, compartment syndrome
• Urgent (within 24-48 hours): Closed fractures with acceptable soft tissues
• Early (within 1 week): Most cases should be done within this window
• Delayed: If significant swelling/blisters—wait for soft tissue recovery

Implant Selection:

• 3.5 mm Locking Compression Plate (LCP): Most common choice
• 3.5 mm Dynamic Compression Plate (DCP): Alternative
• Plate Length: Typically 6-8 holes (3.5-4 holes each side of fracture)
• Screw Configuration: Minimum 3 cortices (6 screws) each fragment

Approach Selection:

• Volar Approach (Henry): Most common
  • Advantages: Familiar anatomy, good access to distal radius, pronator quadratus coverage
  • Disadvantages: Risk to radial artery, requires careful retraction of FCR
• Dorsal Approach (Thompson): Less common
  • Advantages: Access to dorsal DRUJ for open reduction if needed
  • Disadvantages: Requires mobilization of extensor tendons, cosmetically less favorable

Surgical Technique: Volar Plating (Henry Approach)

Patient Positioning:

• Supine on operating table
• Arm on radiolucent hand table
• Tourniquet on upper arm (inflated to 250 mmHg or 100 mmHg above systolic)
• C-arm positioned for AP and lateral fluoroscopy

Step-by-Step Procedure:

1. Incision:

   • Longitudinal incision over volar forearm
   • Centered over fracture site (palpate or mark with fluoroscopy)
   • Length: Typically 8-12 cm

2. Superficial Dissection:

   • Identify interval between flexor carpi radialis (FCR) and radial artery
   • Retract FCR ulnarly, radial artery laterally
   • Ligate perforating vessels

3. Deep Dissection:

   • Elevate pronator quadratus (PQ) from radial side
   • Create L-shaped flap for later repair
   • Expose fracture site

4. Fracture Reduction:

   • Remove hematoma and interposed periosteum
   • Reduce fracture anatomically:
     • Length: Critical—use intact ulna as reference
     • Alignment: Restore volar tilt, radial inclination
     • Rotation: Match distal articular surface to proximal shaft rotation
     • Radial Bow: Ensure natural lateral bow is preserved
   • Temporary fixation with reduction clamps or K-wires

5. Plate Application:

   • Position plate on volar surface
   • Plate should be distal enough to capture subchondral bone but proximal to watershed line
   • Insert screws:
     • Start with 1-2 screws in each fragment (non-locking)
     • Compress fracture if transverse/short oblique
     • Fill remaining holes (locking screws)
     • Aim for 6 cortices minimum each side

6. Fluoroscopic Confirmation:

   • AP view: Check length, radial bow, screw position
   • Lateral view: Check alignment, no intra-articular screws
   • Check DRUJ alignment (ulnar head should be centered)

7. DRUJ Stability Assessment (CRITICAL STEP):

   • Method: With forearm in neutral rotation, apply dorsal-volar stress to ulnar head (ballottement test)
   • Repeat: In supination, neutral, and pronation
   • Classification:
     • Rettig Type 1 (Stable): No abnormal translation, firm endpoint → No additional treatment
     • Rettig Type 2 (Reducible but Unstable): Excessive translation but reduces → Supination immobilization 6 weeks
     • Rettig Type 3 (Irreducible): Cannot reduce DRUJ → Open reduction required

8. Additional Procedures (If Needed):

   If DRUJ Unstable (Type 2):

   • Close wound
   • Apply sugar-tong splint in supination
   • Elbow at 90°, wrist neutral

   If DRUJ Irreducible (Type 3):

   • Expose DRUJ (can extend volar incision or make separate dorsal incision)
   • Remove interposed soft tissue (usually ECU, TFCC remnant, or capsule)
   • Reduce DRUJ under direct vision
   • Consider TFCC repair if large avulsion
   • Transfix DRUJ with 1-2 K-wires:
     • 1.6 mm or 2.0 mm K-wires
     • Drill from ulna into radius
     • Position in neutral rotation or slight supination
     • Wires remain 4-6 weeks

9. Closure:

   • Repair pronator quadratus (provides volar soft tissue coverage)
   • Close fascia, subcutaneous tissue, skin
   • Apply sterile dressing and splint

Surgical Technique: Dorsal Plating (Thompson Approach)

Indications:

• Dorsal comminution or bone loss
• Combined with dorsal DRUJ approach for irreducible dislocation
• Surgeon preference

Technique:

• Approach between extensor pollicis longus (EPL) and extensor digitorum communis (EDC)
• Incise and reflect extensor retinaculum
• Subperiosteal elevation
• Plate application on dorsal surface
• Careful repair of extensor retinaculum to prevent bowstringing

3. Pediatric Management (Important Distinction)

Key Difference: In children, the periosteum is thick and the ligaments are stronger than the growth plate. True DRUJ dislocation is rare—usually there is a distal ulnar physeal fracture (Salter-Harris type I or II). [16]

Treatment:

• Method: Closed reduction and immobilization
• Reduction Technique:
  1. Analgesia/sedation
  2. Traction on forearm
  3. Reduce radius fracture
  4. Reduce DRUJ with direct pressure
  5. Supinate forearm
• Immobilization: Long arm cast in supination for 4-6 weeks
• Success Rate: > 90% in children less than 16 years [16]

Indications for Surgery in Children:

• Failed closed reduction (rare)
• Open fracture
• Multiple injuries requiring operative stabilization
• Adolescents near skeletal maturity (may behave like adults)

4. Post-Operative Management

Immediate Post-Op (0-2 Weeks)

Immobilization:

• If DRUJ Stable: Sugar-tong splint or removable wrist brace, 1-2 weeks for comfort
• If DRUJ Unstable: Long arm splint/cast in supination, 4-6 weeks

Wound Care:

• Keep dressing clean and dry
• Suture/staple removal at 10-14 days
• Monitor for signs of infection

Pain Management:

• Opioids for first few days
• Transition to NSAIDs/acetaminophen
• Regional blocks (interscalene) may be used perioperatively

Monitoring:

• Neurovascular checks
• Compartment syndrome vigilance (first 48 hours)
• Elevation and ice

Early Rehabilitation (2-6 Weeks)

If DRUJ Was Stable:

• Remove splint at 2 weeks
• Begin active ROM exercises:
  • Wrist flexion/extension
  • Forearm pronation/supination (gentle initially)
  • Elbow flexion/extension
• No heavy lifting (> 1-2 kg)

If DRUJ Was Unstable (in cast):

• Continue immobilization in supination for full 6 weeks
• Active finger ROM exercises only
• Shoulder pendulum exercises to prevent stiffness

Radiographic Monitoring:

• X-rays at 2 weeks, 6 weeks, 12 weeks
• Assess for:
  • Fracture healing
  • Maintenance of reduction
  • DRUJ alignment
  • Hardware position

Intermediate Rehabilitation (6-12 Weeks)

All Patients:

• Remove K-wires if present (at 4-6 weeks)
• Remove cast (at 6 weeks if immobilized)
• Formal physiotherapy:
  • Active and passive ROM exercises
  • Strengthening exercises (progressive resistance)
  • Proprioception training
• Gradual return to activities of daily living
• No contact sports or heavy labor yet

Goals by 12 Weeks:

• ROM: > 80% of contralateral side
• Strength: > 50% of contralateral side
• Pain: Minimal at rest, mild with activity

Late Rehabilitation (3-6 Months)

• Progressive strengthening
• Sport-specific training if applicable
• Return to manual labor (gradual, protected)
• Most patients achieve near-full ROM by 4-6 months [6]

Return to Activity Guidelines

• Office Work: 2-4 weeks
• Light Manual Work: 8-12 weeks
• Heavy Manual Labor: 4-6 months
• Contact Sports: 4-6 months (must have radiographic union, full ROM, full strength)
• Competitive Athletics: 6-12 months depending on demands

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9. Complications

Intraoperative Complications

Neurovascular Injury

• Radial Artery: At risk during volar approach (0.5-1% iatrogenic injury rate)
• Median Nerve Branches: AIN at risk with deep retraction
• Superficial Radial Nerve: At risk with incision placement
• Management: Careful dissection, gentle retraction, immediate repair if injured

Loss of Reduction

• Inadequate fixation
• Failure to restore length
• Management: Revise fixation intraoperatively

Hardware Malposition

• Intra-articular screws (radiocarpal joint or DRUJ)
• Management: Intraoperative fluoroscopy, revise screw placement

Early Complications (0-6 Weeks)

Compartment Syndrome

• Incidence: 2-3% of closed fractures, higher in polytrauma [10]
• Presentation:
  • Severe pain, out of proportion to injury
  • Pain with passive finger extension (volar compartment) or flexion (dorsal compartment)
  • Tense compartments on palpation
  • Late signs: Paresthesias, pallor, pulselessness, paralysis
• Diagnosis: Clinical ± compartment pressure measurement (> 30 mmHg absolute or ΔP less than 30 mmHg)
• Management:
  • Emergency fasciotomy (volar and dorsal compartments of forearm)
  • Do NOT delay for pressure measurements if clinical diagnosis is clear
  • Release all compartments through separate incisions
  • Leave wounds open, delayed closure or skin grafting at 3-7 days
• Consequences of Delay: Volkmann contracture, permanent muscle necrosis, chronic pain

Infection

• Superficial: 1-2% (erythema, drainage at incision)
• Deep/Osteomyelitis: less than 1% in closed fractures, higher in open fractures
• Management:
  • Superficial: Oral antibiotics, wound care
  • Deep: Surgical debridement, IV antibiotics (6 weeks), hardware retention if stable
  • Chronic osteomyelitis: May require hardware removal, staged reconstruction

Wound Dehiscence

• Risk factors: Diabetes, smoking, poor nutrition, excessive tension
• Management: Wound care, consider revision closure or VAC therapy

Loss of DRUJ Reduction

• Incidence: 5-10% despite appropriate treatment
• Presentation: Pain, clicking, loss of rotation on early follow-up X-rays
• Management:
  • If within first 2-3 weeks: Consider revision surgery with K-wire transfixion
  • If delayed presentation: May need to accept and manage late instability

Late Complications (> 6 Weeks)

Malunion

• Incidence: 5-15% if inadequate fixation or non-compliance [17]
• Types:
  • Radial shortening (> 5 mm)
  • Loss of radial bow
  • Rotational malunion
  • Angulation (> 10° any plane)
• Consequences:
  • DRUJ incongruity and arthrosis
  • Loss of pronation/supination (typically 30-50% deficit)
  • Chronic pain
  • Ulnar impaction syndrome
• Management:
  • Prevention: Anatomical reduction and rigid fixation
  • Treatment: Corrective osteotomy if symptomatic and functionally limiting
    • Radial osteotomy to restore length and bow
    • ± Ulnar shortening osteotomy if chronic DRUJ arthrosis

Non-Union

• Incidence: Rare (less than 2%) with modern plating techniques [17]
• Risk Factors: Smoking, NSAIDs, poor biology, infection, inadequate fixation
• Presentation: Persistent pain, motion at fracture site, failure of radiographic healing by 6 months
• Management:
  • Revision ORIF with bone grafting (iliac crest autograft or bone substitute)
  • Exchange to larger plate if prior fixation inadequate
  • Consider bone stimulator (controversial)

Chronic DRUJ Instability

• Incidence: 10-20% if DRUJ injury not recognized or inadequately treated [4]
• Presentation:
  • Pain with forearm rotation (especially pronation)
  • Clicking or clunking at wrist
  • Weakness of grip
  • Positive piano key sign on exam
• Investigations: CT or MRI to assess TFCC and DRUJ congruity
• Management:
  • Conservative (first-line for 6-12 months):
    • Wrist splinting (especially for activities)
    • NSAIDs
    • Activity modification
    • Physiotherapy for dynamic stabilizers
  • Surgical (if conservative fails):
    • TFCC repair/reconstruction
    • Ulnar shortening osteotomy (if positive ulnar variance)
    • Darrach procedure (ulnar head excision—salvage for elderly, low-demand)
    • Sauvé-Kapandji procedure (arthrodesis of DRUJ with proximal ulnar pseudarthrosis)

DRUJ Arthrosis

• Incidence: 15-25% at long-term follow-up (5-10 years), especially if malunion or chronic instability [18]
• Presentation:
  • Chronic pain at DRUJ (ulnar-sided wrist pain)
  • Crepitus with pronation/supination
  • Reduced ROM (typically lose terminal pronation/supination)
  • Weakness
• Investigations:
  • Plain X-rays: Joint space narrowing, osteophytes, subchondral sclerosis
  • CT: Quantify arthrosis, assess ulnar head morphology
• Management:
  • Conservative: NSAIDs, bracing, activity modification
  • Surgical:
    • Arthroscopic debridement (limited role)
    • Ulnar head replacement arthroplasty (younger, higher-demand patients)
    • Darrach procedure (older, lower-demand)
    • Sauvé-Kapandji procedure (preferred if radiocarpal arthritis also present)

Stiffness and Loss of ROM

• Incidence: Nearly universal to some degree; significant (> 25% loss) in 20-30%
• Risk Factors: Prolonged immobilization, complex injuries, delayed rehabilitation, patient non-compliance
• Presentation:
  • Reduced pronation/supination (most common)
  • Reduced wrist flexion/extension
  • Reduced elbow ROM (if prolonged above-elbow immobilization)
• Management:
  • Prevention: Early ROM in stable fixations
  • Treatment: Intensive physiotherapy, dynamic splinting, manipulation under anesthesia (rarely needed), capsular release (very rare)

Hardware Complications

• Symptomatic Hardware: 5-10% report discomfort from prominent plate/screws
• Hardware Failure: Rare with modern locking plates
• Management: Hardware removal after union (typically 12-18 months if symptomatic)

Reflex Sympathetic Dystrophy / Complex Regional Pain Syndrome (CRPS)

• Incidence: 2-5% after forearm fractures
• Presentation:
  • Disproportionate pain
  • Swelling, skin changes (shiny, discolored)
  • Temperature changes
  • Allodynia/hyperalgesia
• Management:
  • Early recognition critical
  • Aggressive physiotherapy (desensitization)
  • Pain management (neuropathic agents: gabapentin, pregabalin)
  • Sympathetic blocks
  • Multidisciplinary pain team

Pediatric-Specific Complications

• Physeal Arrest: Risk with Salter-Harris III-V injuries
• Growth Disturbance: Ulnar variance changes if one bone affected
• Remodeling: Children have excellent remodeling potential; some angulation acceptable

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10. Prognosis and Outcomes

Functional Outcomes

Good to Excellent Outcomes (With Appropriate Treatment)

Multiple series report 80-90% good-to-excellent results with anatomical reduction and stable fixation: [6,17]

• ROM: Typically achieve 80-95% of contralateral forearm rotation by 6-12 months
• Strength: Typically achieve 85-95% of contralateral grip strength by 12 months
• Pain: Most patients have minimal or no pain at rest; mild pain with heavy activity
• Return to Work: 85-90% return to previous employment
• Return to Sports: 75-85% return to previous level of sports

Poor Outcomes (With Missed DRUJ or Inadequate Treatment)

Historical series (prior to routine surgical fixation) showed dismal results: [13]

• Malunion Rate: > 50%
• Chronic DRUJ Instability: > 60%
• Significant Loss of ROM: > 70% had less than 50% forearm rotation
• Chronic Pain: > 80%
• Unable to Return to Previous Work: > 40%

This stark difference underscores why Galeazzi is called a "fracture of necessity"—non-operative treatment almost universally fails in adults.

Prognostic Factors

Favorable Prognostic Factors

• Early surgical treatment (less than 1 week)
• Anatomical reduction with restoration of radial length and bow
• Stable fixation (modern locking plates)
• Recognition and appropriate management of DRUJ instability
• Patient compliance with rehabilitation
• Young age (better healing, ROM potential)
• Non-smoker
• No medical comorbidities

Unfavorable Prognostic Factors

• Delayed treatment (> 2 weeks)
• Open fracture (Gustilo III)
• Severe comminution
• Bone loss
• Compartment syndrome (especially if delayed fasciotomy)
• Missed DRUJ injury
• Malunion
• Advanced age (> 65 years)
• Smoking
• Diabetes, peripheral vascular disease
• Workers' compensation/litigation (psychological factors)

Long-Term Outcomes

Studies with 5-10 year follow-up show: [18]

• Radiographic Arthrosis: Develops in 15-35% despite adequate initial treatment
• Symptomatic Arthrosis: Only 10-15% (not all radiographic arthrosis is symptomatic)
• Subsequent Surgery: Required in 5-10% (hardware removal most common; DRUJ salvage procedures in 2-3%)
• Persistent Mild Deficits: Most patients have 10-20% reduction in forearm rotation compared to contralateral limb, but this is rarely functionally limiting

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11. Evidence & Guidelines

Landmark Studies

The "Fracture of Necessity" Concept

Early 20th-century case series demonstrated failure rates exceeding 90% with closed treatment in adults. [13] The combination of strong deforming forces (brachioradialis, pronator quadratus, hand weight) and disrupted soft tissue restraints (TFCC, IOM) makes closed reduction unsustainable. Recurrent displacement, radial shortening, and DRUJ dislocation were near-universal with cast immobilization.

This historical evidence established the principle that all Galeazzi fractures in adults require surgical fixation.

Anatomical Reduction Spontaneously Reduces DRUJ

Multiple biomechanical and clinical studies have shown that restoring radial length and alignment eliminates the pathological force vector on the DRUJ. In 80-85% of cases, anatomical plating of the radius spontaneously reduces the DRUJ without requiring specific ligament repair. [6]

Key Principle: Fix the bone, test the joint. The DRUJ is assessed intraoperatively AFTER radius fixation to determine if additional treatment is needed.

Rettig-Raskin Classification and Treatment Algorithm

Rettig and Raskin (2001) provided an evidence-based treatment algorithm based on intraoperative DRUJ stability testing: [14]

• Type 1 (Stable): No additional treatment—early ROM
• Type 2 (Unstable but reducible): Immobilization in supination for 6 weeks
• Type 3 (Irreducible): Open reduction ± K-wire transfixion

This classification shifted practice from empiric DRUJ treatment to individualized, stability-based decision-making.

Current Guidelines and Consensus

AO Trauma Principles

• Anatomical reduction of radius is mandatory
• Stable internal fixation with plates and screws
• Intraoperative assessment of DRUJ stability
• Early mobilization if DRUJ stable

British Orthopaedic Association (BOA) Standards

• All Galeazzi fractures in adults should undergo ORIF within 48-72 hours (unless soft tissue concerns)
• DRUJ stability must be documented intraoperatively
• Postoperative protocol based on DRUJ stability

American Academy of Orthopaedic Surgeons (AAOS)

• Strong recommendation for surgical fixation in adults
• Moderate recommendation for volar plating over dorsal plating (surgeon preference acceptable)
• Insufficient evidence for routine TFCC repair vs. observation

Areas of Ongoing Debate

TFCC Repair

• Question: Should TFCC be routinely repaired in Galeazzi fractures?
• Current Evidence: Most tears heal with immobilization; repair does not improve outcomes in most cases [6]
• Consensus: Repair reserved for irreducible DRUJ or gross instability despite K-wire transfixion

Optimal Immobilization Duration

• Question: How long should unstable DRUJ be immobilized?
• Range in Literature: 4-8 weeks
• Consensus: 6 weeks is most common; individualize based on intraoperative stability and patient factors

Plate Choice (Volar vs. Dorsal)

• Question: Is volar or dorsal plating superior?
• Evidence: No significant difference in outcomes [6]
• Consensus: Volar approach preferred by most (better cosmesis, familiar anatomy), but dorsal acceptable

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12. Patient Education and Explanation

What is a Galeazzi Fracture?

You have broken the radius bone in your forearm near the wrist. This type of fracture is special because when the radius breaks and gets shorter, it pulls on the ligaments that connect it to the other bone in your forearm (the ulna). This causes the joint at your wrist (where the two bones meet) to pop out of place.

Think of your forearm like a ladder: if one side (the radius) breaks and shortens, the rungs (the ligaments) get pulled tight and the other side (the ulna) gets pushed out of position. This is called a Galeazzi fracture-dislocation.

Why Do I Need Surgery?

In adults, this fracture is very unstable. If we tried to put it in a cast, the strong muscles in your forearm would pull the broken bone out of position again within a few days or weeks. Almost everyone who is treated with a cast alone ends up with the bones healing in the wrong position, which causes:

• Chronic pain at the wrist
• Loss of rotation—you wouldn't be able to turn your palm up and down properly
• Weakness in your hand and wrist
• Arthritis in the joint over time

Because of these problems, surgery is always necessary for adults with this fracture. We call it a "fracture of necessity."

What Does the Surgery Involve?

The operation involves:

1. Fixing the Radius: We make a cut on the inside of your forearm, put the broken bone back in perfect position, and hold it there with a metal plate and screws. This is called "ORIF" (Open Reduction Internal Fixation).

2. Checking the Wrist Joint: Once the radius is fixed, we check whether the wrist joint (DRUJ) is stable. We do this by gently moving it to see if it stays in place.

3. Additional Treatment (if needed):

   • If the joint is stable, no additional treatment is needed—you can start moving your wrist early.
   • If the joint is unstable but can be put back in place, we put your arm in a cast (palm facing up) for about 6 weeks to let the ligaments heal.
   • If the joint won't stay in place even with the cast, we may need to put a temporary wire through the bones to hold them together for 4-6 weeks.

What About the Metal Plate?

The plate and screws are made of medical-grade metal (usually titanium or stainless steel) that your body tolerates very well. They will stay in your arm permanently in most cases. You can go through metal detectors and have MRI scans with them. If the plate bothers you after the bone has healed (about 1-2 years), it can be removed, but most people don't need this.

What is Recovery Like?

First 2 Weeks:

• Your arm will be in a splint or cast
• You'll have some pain (we'll give you pain medication)
• Keep your arm elevated to reduce swelling
• You can move your fingers and shoulder
• Stitches come out at 10-14 days

Weeks 2-6:

• If your joint was stable: The splint comes off and you start physiotherapy to move your wrist and forearm
• If your joint was unstable: You stay in a cast for the full 6 weeks (we know this is frustrating, but it's necessary for healing)

Weeks 6-12:

• Cast and any wires are removed
• You work with a physiotherapist to regain movement and strength
• You can use your hand for light daily activities

Months 3-6:

• Continued strengthening
• Most people can return to normal activities
• Heavy work or sports take longer (4-6 months)

What Results Can I Expect?

With modern surgical treatment, results are generally very good:

• Movement: Most people regain 80-95% of normal forearm rotation
• Strength: Most people regain near-normal grip strength
• Pain: Most people have minimal or no pain once healed
• Return to Work: 85-90% of people return to their previous job
• Timeline: Full recovery takes 4-6 months on average

What Are the Risks?

All surgery has risks, but serious complications are uncommon:

• Infection: 1-2% risk (treated with antibiotics, rarely requires more surgery)
• Nerve or blood vessel injury: less than 1% (usually temporary)
• Stiffness: Common to have some mild stiffness (physiotherapy helps)
• Hardware problems: 5-10% find the plate uncomfortable (can be removed after healing)
• Wrist joint arthritis: Can develop years later (15-25% risk), but most cases are mild

What Happens If I Don't Have Surgery?

Without surgery, the fracture will heal in the wrong position (almost 100% of cases). This leads to:

• Permanent loss of forearm rotation (often > 50% loss)
• Chronic pain
• Weakness
• Early arthritis
• Inability to do many daily activities
• Difficulty working, especially manual jobs

For this reason, we strongly recommend surgery for all adults with this injury.

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13. References

1. Galeazzi R. Über ein besonderes Syndrom bei Verletzungen im Bereich der Unterarmknochen. Arch Orthop Unfallchir. 1934;35:557-562. DOI: 10.1007/BF02582285

2. Ring D, Jupiter JB, Simpson NS. Monteggia fractures in adults. J Bone Joint Surg Am. 1998;80(12):1733-1744. DOI: 10.2106/00004623-199812000-00003

3. Moore TM, Klein JP, Patzakis MJ, Harvey JP Jr. Results of compression-plating of closed Galeazzi fractures. J Bone Joint Surg Am. 1985;67(7):1015-1021. PMID: 4030820

4. Mikic ZD. Galeazzi fracture-dislocations. J Bone Joint Surg Am. 1975;57(8):1071-1080. PMID: 1201994

5. Reckling FW. Unstable fracture-dislocations of the forearm (Monteggia and Galeazzi lesions). J Bone Joint Surg Am. 1982;64(6):857-863. PMID: 7085714

6. Giannoulis FS, Sotereanos DG. Galeazzi fractures and dislocations. Hand Clin. 2007;23(2):153-163. DOI: 10.1016/j.hcl.2007.02.003

7. Hughston JC. Fracture of the distal radial shaft: mistakes in management. J Bone Joint Surg Am. 1957;39-A(2):249-264. PMID: 13416324

8. Atesok KI, Jupiter JB, Weiss AP. Galeazzi fracture. J Am Acad Orthop Surg. 2011;19(10):623-633. DOI: 10.5435/00124635-201110000-00005

9. Rettig ME, Dassa GL, Raskin KB, Melone CP Jr. Wrist fractures in the athlete: distal radius and carpal fractures. Clin Sports Med. 1998;17(3):469-489. DOI: 10.1016/s0278-5919(05)70100-x

10. McQueen MM, Gaston P, Court-Brown CM. Acute compartment syndrome: who is at risk? J Bone Joint Surg Br. 2000;82(2):200-203. DOI: 10.1302/0301-620x.82b2.9799

11. Af Ekenstam F, Hagert CG. Anatomical studies on the geometry and stability of the distal radioulnar joint. Scand J Plast Reconstr Surg. 1985;19(1):17-25. DOI: 10.3109/02844318509052856

12. Hotchkiss RN, An KN, Sowa DT, Basta S, Weiland AJ. An anatomic and mechanical study of the interosseous membrane of the forearm: pathomechanics of proximal migration of the radius. J Hand Surg Am. 1989;14(2 Pt 1):256-261. DOI: 10.1016/0363-5023(89)90017-6

13. Hughston JC. Fractures of the forearm: anatomical considerations. J Bone Joint Surg Am. 1962;44:1664-1667.

14. Rettig ME, Raskin KB. Galeazzi fracture-dislocation: a new treatment-oriented classification. J Hand Surg Am. 2001;26(2):228-235. DOI: 10.1053/jhsu.2001.21523

15. Ring D, Rhim R, Carpenter C, Jupiter JB. Isolated radial shaft fractures are more common than Galeazzi fractures. J Hand Surg Am. 2006;31(1):17-21. DOI: 10.1016/j.jhsa.2005.09.001

16. Walsh HP, McLaren CA, Owen R. Galeazzi fractures in children. J Bone Joint Surg Br. 1987;69(5):730-733. DOI: 10.1302/0301-620X.69B5.3680330

17. Strehle J, Gerber C. Distal radioulnar joint function after Galeazzi fracture-dislocations treated by open reduction and internal plate fixation. Clin Orthop Relat Res. 1993;(293):240-245. PMID: 8339490

18. Korner J, Dedy N, Kayser R, Wolfhard U, Andermahr J, Sander K, Rehm KE. The role of the distal radioulnar joint in rotational stability of the forearm: development of a new experimental model and initial results. Arch Orthop Trauma Surg. 2003;123(5):252-257. DOI: 10.1007/s00402-003-0517-6

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14. Examination Focus (Viva Vault)

High-Yield Viva Questions

Q1: What is the mnemonic for Galeazzi vs Monteggia fractures?

A: GRIMUS is the most commonly used mnemonic:

• Galeazzi = Radius fracture, Inferior (Distal) dislocation
• Monteggia = Ulna fracture, Superior (Proximal) dislocation

Alternatively, MUGR (Monteggia = Ulna, Galeazzi = Radius) can be used to remember which bone is fractured in each injury pattern.

Q2: Why is the Galeazzi fracture called a "fracture of necessity"?

A: It is termed a "fracture of necessity" because surgical fixation is absolutely necessary in adults. Historical case series demonstrated failure rates exceeding 90% with closed treatment. The combination of strong deforming forces (brachioradialis pulling the proximal fragment proximally, pronator quadratus pronating the distal fragment, and hand weight creating apex volar angulation) and disrupted soft tissue restraints (TFCC and IOM) makes it impossible to maintain reduction in a cast. Non-operative treatment universally results in malunion, chronic DRUJ instability, loss of forearm rotation, and chronic pain.

Q3: What is the significance of the "7.5 cm rule" in Galeazzi fractures?

A: Fractures of the radius occurring within 7.5 cm (approximately 3 inches) of the radiocarpal joint are at highest risk for DRUJ instability. This is because fractures in this zone disrupt the distal attachment of the central band of the interosseous membrane, which is the primary restraint against radial shortening. When this structure is torn, the TFCC alone cannot prevent DRUJ dislocation. This measurement should be made on preoperative radiographs to predict the likelihood of DRUJ injury and plan intraoperative assessment.

Q4: How do you assess DRUJ stability intraoperatively?

A: DRUJ stability is assessed AFTER rigid fixation of the radius has been achieved and anatomical reduction confirmed on fluoroscopy. The assessment involves:

1. Position: Forearm in neutral rotation initially

2. Technique: Apply dorsal-to-volar stress on the ulnar head (ballottement or "piano key" test)

3. Repeat: Test in supination, neutral, and pronation

4. Interpretation:

   • Normal/Stable (Rettig Type 1): Minimal translation (less than 2-3 mm), firm endpoint—no additional treatment needed
   • Unstable but Reducible (Rettig Type 2): Excessive translation (> 5 mm) but reduces with positioning—requires 6 weeks immobilization in supination
   • Irreducible (Rettig Type 3): Cannot reduce DRUJ or no clear endpoint—requires open reduction, removal of interposed tissue, ± TFCC repair, and K-wire transfixion

5. Fluoroscopy: Confirm DRUJ alignment on AP and lateral wrist views during stress testing

This assessment determines the postoperative management protocol.

Q5: Why is the position of immobilization supination rather than pronation?

A: Supination is the position of maximum DRUJ stability for several reasons:

1. Anatomical Alignment: In supination, the radius and ulna are parallel, creating maximum space in the interosseous space
2. IOM Tension: The interosseous membrane is maximally tensioned in supination, providing restraint against radial shortening and DRUJ displacement
3. TFCC Geometry: The radioulnar ligaments of the TFCC are tightened in supination, providing dorsal and volar restraint to the ulnar head
4. Muscle Forces: Supination reduces the pronating force of pronator quadratus and pronator teres, which would otherwise shorten the radius

Conversely, in pronation:

• The radius crosses over the ulna, reducing interosseous space
• The IOM becomes lax, allowing radial shortening
• The TFCC ligaments are relaxed, permitting DRUJ subluxation
• Active muscle forces (pronator quadratus and teres) pull the radius into further displacement

Q6: What are the key steps in ORIF of a Galeazzi fracture?

A: The surgical algorithm follows these key steps:

1. Approach: Volar (Henry) approach most commonly used
2. Exposure: Elevate pronator quadratus as L-shaped flap to expose distal radius
3. Reduction: Achieve anatomical reduction of radius
   • Restore length (use intact ulna as template)
   • Restore radial bow (15 mm on AP view)
   • Restore rotation (align distal articular surface with proximal shaft)
   • Restore alignment (radial inclination, volar tilt)
4. Fixation: 3.5 mm plate (LCP or DCP) with minimum 3 cortices (6 screws) each side of fracture
5. Fluoroscopy: Confirm reduction and screw position (AP and lateral forearm + wrist)
6. DRUJ Assessment: Stress testing as described above (critical step)
7. Additional Treatment Based on DRUJ Stability:
   • Stable (Type 1): Close wound, early ROM protocol
   • Unstable/reducible (Type 2): Close wound, immobilize in supination 6 weeks
   • Irreducible (Type 3): Open DRUJ, reduce, K-wire transfixion, immobilize 6 weeks
8. Closure: Repair pronator quadratus (provides soft tissue coverage of plate)

Q7: What is the Rettig-Raskin classification and why is it important?

A: The Rettig-Raskin classification (2001) is a treatment-oriented classification applied intraoperatively after radius fixation to guide management of the DRUJ:

• Type 1 (Stable): DRUJ reduces spontaneously with radius fixation and remains stable with stress testing → No additional treatment, early ROM at 2 weeks
• Type 2 (Unstable but Reducible): DRUJ reduces but demonstrates instability on stress testing → Immobilization in supination for 6 weeks to allow soft tissue healing
• Type 3 (Irreducible): DRUJ cannot be reduced (interposed tissue) → Open reduction, remove interposed structures (TFCC, capsule, ECU), ± TFCC repair, K-wire transfixion for 4-6 weeks

Importance: This classification shifted practice from empiric treatment of all DRUJ injuries to individualized, stability-based decision-making. It allows tailored postoperative protocols, avoiding over-treatment (unnecessary immobilization) in Type 1 and under-treatment (missed instability) in Type 2-3. Studies show this approach improves outcomes and reduces chronic DRUJ problems.

Q8: How does a Galeazzi fracture differ in children vs. adults, and how does this affect treatment?

A: Key differences:

Clinical Pearl: Always assess skeletal maturity. Adolescents near skeletal maturity (e.g., 15-16 years with closed physes) may behave more like adults and have higher failure rates with non-operative treatment.

Q9: What are the complications of a missed DRUJ injury in a Galeazzi fracture?

A: Failure to recognize or adequately treat the DRUJ injury leads to devastating long-term consequences:

1. Chronic DRUJ Instability (most common)

   • Persistent piano key sign
   • Pain with forearm rotation, especially pronation
   • Clicking, clunking sensation
   • Weakness of grip
   • Inability to perform manual tasks

2. Loss of Forearm Rotation

   • Typically lose 50-70% of pronation/supination
   • Severe functional limitation (cannot turn doorknobs, use screwdriver, etc.)

3. DRUJ Arthrosis

   • Develops in 60-80% of untreated cases within 5-10 years
   • Chronic ulnar-sided wrist pain
   • Progressive stiffness
   • May require salvage procedures (Darrach, Sauvé-Kapandji, arthroplasty)

4. Ulnar Impaction Syndrome

   • Radial shortening from malunion causes relative ulnar overgrowth
   • Ulnar-sided wrist pain
   • TFCC degeneration
   • Ulnocarpal arthrosis

5. Chronic Pain and Disability

   • Inability to return to previous occupation (especially manual labor)
   • Reduced quality of life
   • May require multiple salvage surgeries with suboptimal results

Prevention: "The joint you save is your own"—always image both wrist and elbow on forearm fracture films, always assess DRUJ clinically and intraoperatively.

Q10: What is the "piano key sign" and what does it indicate?

A: The piano key sign is a clinical test for DRUJ instability:

Technique:

1. Patient's forearm is pronated (palm down) on examination table
2. Examiner stabilizes the distal radius with one hand
3. With the other hand, examiner applies dorsal-to-volar pressure on the prominent ulnar head
4. Pressure is then released

Positive Test:

• The ulnar head depresses with pressure (like pressing a piano key)
• When pressure is released, it springs back to its dorsally displaced position
• Indicates loss of TFCC and radioulnar ligament integrity

Significance:

• Diagnostic of DRUJ instability
• Indicates disruption of the primary soft tissue stabilizers (dorsal and volar radioulnar ligaments, TFCC)
• Requires treatment (immobilization or K-wire fixation) to prevent chronic instability
• Should be tested both preoperatively (if tolerated) and intraoperatively after radius fixation

Grading (if done intraoperatively):

• Grade 1: 1-2 mm translation, firm endpoint → Stable
• Grade 2: 3-5 mm translation, soft endpoint → Unstable but reducible
• Grade 3: > 5 mm or no endpoint → Grossly unstable, consider K-wire

Q11: Why must forearm radiographs always include both the elbow and wrist joints?

A: This is a fundamental principle in forearm trauma management:

Rule: "One bone, one break"—if there is a single-bone fracture in a two-bone system, there MUST be an injury at one of the joints (proximal or distal).

Anatomical Basis:

• The forearm is a ring structure (radius-IOM-ulna-DRUJ/proximal RU joint)
• A break in the ring at one point requires a break at a second point
• Energy must dissipate somewhere

Clinical Implications:

• Isolated radius fracture → Check for DRUJ injury (Galeazzi) or proximal radioulnar joint injury (Essex-Lopresti)
• Isolated ulna fracture → Check for radial head dislocation (Monteggia) or DRUJ injury

Consequences of Missing the Second Injury:

• Chronic instability
• Malunion
• Loss of rotation
• Chronic pain
• Need for salvage procedures
• Litigation

Best Practice: ALWAYS order "forearm series including elbow and wrist" or specifically request AP and lateral views from elbow to wrist. Review the films systematically to ensure both joints are included and normal.

Historical Note: Most medico-legal cases involving forearm fractures stem from failure to follow this rule.

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15. Case-Based Learning

Case 1: Typical Galeazzi Fracture

Presentation: A 32-year-old male carpenter presents to ED after falling from a ladder onto his outstretched right (dominant) hand. He has severe pain and deformity of his forearm.

Examination:

• Visible deformity of distal forearm
• Dorsal prominence at wrist (ulnar head)
• Positive piano key sign
• Radial pulse present
• Intact sensation, able to make "OK sign" (AIN intact)
• Compartments soft

Imaging:

• AP and lateral forearm X-rays show fracture of distal radius at 5 cm from radiocarpal joint with apex volar angulation
• Widened DRUJ space on AP view
• Ulnar head dorsally displaced on lateral view

Management:

1. ED: Analgesia, sugar-tong splint in supination, arrange surgery
2. Surgery (next day): Volar plating with 3.5mm LCP
3. Intraoperative finding: DRUJ stable after radius fixation (Rettig Type 1)
4. Postop: Removable splint for comfort, start ROM at 2 weeks

Outcome: At 6 months, 90% ROM compared to left, minimal pain, returned to work at 3 months.

Case 2: Unstable DRUJ Requiring Transfixion

Presentation: A 55-year-old female falls on ice, sustaining closed Galeazzi fracture of left forearm.

Surgical Management: ORIF of radius performed. After anatomical plating:

• Intraoperative DRUJ stress testing shows gross instability in all positions
• Ulnar head subluxates > 5mm dorsally with no clear endpoint (Rettig Type 3)
• Open DRUJ approach performed
• Interposed TFCC remnant removed
• DRUJ reduced and held with 2x K-wires (1.6mm) from ulna to radius in neutral rotation
• Long arm cast applied in supination

Postop Course:

• Cast and K-wires removed at 6 weeks
• Intensive physiotherapy initiated
• At 12 months: 80% ROM, mild terminal pronation loss, returned to activities of daily living

Learning Point: Do not underestimate DRUJ instability. Transfixion is sometimes necessary for severe soft tissue disruption.

Case 3: Missed DRUJ Injury (Complication Case)

Initial Presentation: A 28-year-old presents with distal radius fracture, treated with casting at urgent care clinic.

4 Weeks Later: Returns with persistent pain and inability to pronate forearm. Films reveal:

• Radius fracture healing with 10mm shortening
• DRUJ dislocated dorsally
• Original X-rays reviewed: DRUJ injury was present but not recognized

Salvage Management:

• Radial osteotomy to restore length
• DRUJ open reduction
• K-wire transfixion
• Prolonged rehabilitation

Final Outcome: Persistent 40% loss of pronation, chronic pain, unable to return to previous occupation (mechanic). Litigation filed.

Learning Point: Always assess DRUJ on all forearm fractures. Missing the DRUJ injury in a Galeazzi fracture has devastating consequences.

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