Principles of Fracture Management

Fracture Fundamentals - Bone Break Basics

• Fracture: A break in the continuity of bone.
• Key Descriptors:
  • Etiology: Traumatic, Pathological (e.g., tumor, osteoporosis), Stress.
  • Skin Integrity: Open (communicates with exterior) vs. Closed.
  • Displacement: Angulation, Rotation, Translation (Shift), Shortening.
  • Pattern: Transverse, Linear, Oblique (non/displaced), Spiral, Greenstick, Torus, Comminuted (>2 fragments).

⭐ Gustilo-Anderson classification is vital for open fractures: Type I (<1 cm, clean), Type II (>1 cm, no extensive soft tissue damage, flaps, or avulsions), Type III (extensive soft tissue damage; A,B,C subtypes based on severity and vascular injury).

Healing & Diagnosis - Mend & Find

• Fracture Healing Stages:
  • Inflammation/Hematoma (Day 1-7): Cytokines, growth factors.
  • Soft Callus (Week 2-3): Fibrocartilage bridges gap. Stability ↑.
  • Hard Callus (Week 3-12): Woven bone. Clinical union. X-ray visible.
  • Remodeling (Months-Years): Lamellar bone. Strength ↑, shape restored.
• Diagnosis:
  • Clinical: Pain, deformity, swelling, crepitus, abnormal movement, loss of function. (Inspect, Palpate, Move).
  • Radiological: X-ray (📌 Rule of 2s: 2 views, 2 joints, 2 occasions if occult). CT (complex/articular), MRI (soft tissue/occult).

⭐ Wolff's Law: Bone adapts to loads; remodels based on stress. oka

Management Goals & Non-Op - Fix It Right

• Goals: Relieve pain, achieve bone union in acceptable position, restore optimal function, prevent complications. 📌 Principles: Reduce, Retain, Rehabilitate.
• Non-Operative Methods ("Fix It Right"):
  • Closed Reduction: Manual manipulation; Traction (skin/skeletal).
  • Immobilization (Retention):
    • Casts (POP/Synthetic): Immobilize joint above & below.
    • Splints/Slabs: Acute swelling; temporary.
    • Functional Braces: Allow joint motion (e.g., Sarmiento for humerus).
    • Traction: Definitive for some (e.g., pediatric femur).

⭐ The three-point principle of cast application is crucial for effective immobilization, counteracting deforming forces.

Surgical Strats - Knife & Metal

• Indications for Surgery:
  • Open fractures
  • Displaced intra-articular fractures
  • Failure of conservative management
  • Multiple fractures (polytrauma)
  • Pathological fractures
  • Unstable fractures
  • Neurovascular compromise
• Surgical Options:
  • Open Reduction & Internal Fixation (ORIF): Plates, screws
    • Articular fractures, complex patterns
  • Intramedullary (IM) Nailing: Rods
    • Long bone diaphyseal fractures (femur, tibia)
  • External Fixation (Ex-Fix): Pins & bars
    • Open fractures with severe soft tissue damage, pelvic fractures, damage control orthopaedics

⭐ AO Principles (Arbeitsgemeinschaft für Osteosynthesefragen):

1. Anatomic reduction of fracture fragments.
2. Stable internal fixation.
3. Preservation of blood supply to bone & soft tissues.
4. Early, active, pain-free mobilization of muscles & joints adjacent to the fracture.

• Complications: Infection, non-union, malunion, implant failure, neurovascular injury.

Complications & Concerns - Trouble Ahead

• Systemic:
  • Shock (Hemorrhagic)
  • Fat Embolism Syndrome (FES): Respiratory distress, petechiae, CNS signs. Gurd's criteria.
  • DVT/PE: Virchow's triad.
• Local - Early:
  • Neurovascular Injury: Check distal pulse, sensation, motor.
  • Compartment Syndrome: ⚠️ Pain out of proportion, 6 P's. Pressure >30-40 mmHg. Fasciotomy.
  • Infection: Superficial, deep, osteomyelitis.
• Local - Late:
  • Delayed Union / Non-union: (Hypertrophic 'elephant foot', Atrophic 'pencil point').
  • Malunion: Deformity.
  • Avascular Necrosis (AVN): Scaphoid, femoral head.
  • Stiffness & Contractures: e.g., Volkmann's Ischemic Contracture.
  • Post-traumatic Osteoarthritis.
  • CRPS (Complex Regional Pain Syndrome).

⭐ Volkmann's Ischemic Contracture, a claw-like deformity, is a dreaded sequela of untreated compartment syndrome, especially in supracondylar humerus fractures.

High‑Yield Points - ⚡ Biggest Takeaways

• ATLS protocol is paramount in polytrauma before fracture management.
• Reduction: Aim for anatomic alignment; closed methods preferred.
• Immobilization: Prevents movement, aids union (cast, splint, traction, fixation).
• Open Fractures: Require emergency debridement, IV antibiotics (Gustilo-Anderson).
• Compartment Syndrome: Clinical diagnosis (5 Ps); urgent fasciotomy is crucial.
• Nonunion risks: infection, poor blood supply, instability, smoking.
• Rehabilitation: Essential for restoring function and preventing stiffness.