Local Flaps and Soft Tissue Coverage

Local Flaps and Soft Tissue Coverage: Principles - Skin Deep Savvy

• Local Flaps: Relocate skin & subcutaneous tissue with its native blood supply to an adjacent defect. Primary goal: "Replace like with like" for optimal function & aesthetics.
• Key Principles:
  • Assess Defect: Size, depth, location, surrounding tissue quality.
  • Blood Supply: Crucial. Random pattern (dermal/subdermal plexus) vs. Axial pattern (known artery). 📌 Remember: Axial flaps are more robust.
  • Planning: Plan in reverse. Ensure tension-free closure. Minimize dog-ears.
  • Donor Site: Consider morbidity and closure options.
• Reconstructive Ladder/Elevator: A hierarchical approach to soft tissue reconstruction.

![Reconstructive Ladder/Elevator for Soft Tissue Coverage](https://ylbwdadhbcjolwylidja.supabase.co/storage/v1/object/public/notes/L1/Orthopaedics_Orthopaedic_Techniques_Local_Flaps_and_Soft_Tissue_Coverage/a252c031-cf6d-4204-a4ba-3852fb6f0b61.png)

⭐ The Reconstructive Ladder advocates for using the simplest, most reliable method first, progressing to more complex options only as needed.

Local Flaps and Soft Tissue Coverage: Classification - Sorting Skins

Flaps are classified by blood supply, composition, and transfer method, guiding selection for defect coverage.

Classification of Flaps:

Local Flaps and Soft Tissue Coverage: Common Types - Surgical Showpieces

• Advancement Flaps:
  • Slide directly forward; rely on tissue elasticity.
  • Types: Single pedicle, bipedicle, V-Y plasty.
  • Use: Small defects, good skin laxity.
  • 
• Rotation Flaps:
  • Semicircular flap pivots around a point into an adjacent defect.
  • Use: Triangular/wedge-shaped defects (e.g., scalp, cheek).
  • 
• Transposition Flaps:
  • Rectangular/square flap lifted over intervening skin into a nearby defect.
  • Pedicle at one end.
  • Examples:
    • Z-Plasty: Interposes two triangular flaps. Used for scar contracture release, realigning scars.
      • 
    • Rhomboid (Limberg) Flap: For 60°/120° rhombic defects.
      • 
    • Bilobed Flap: Two lobes from a common pedicle.

⭐ A Z-plasty with 60° angles theoretically increases length along the central limb by 75%. Angles of 30°, 45°, 60°, and 90° give 25%, 50%, 75%, and 100% theoretical gain, respectively.

Local Flaps and Soft Tissue Coverage: Complications - Trouble Tidings

• Early Complications:
  • Hematoma/Seroma: Collection of blood/serum under flap.
  • Flap Necrosis: Due to ischemia (venous > arterial).
    • Signs: Dusky discoloration, ↓ capillary refill, coolness.
  • Infection: Local or systemic signs.
• Late Complications:
  • Flap Contracture: Scarring leading to reduced mobility.
  • Wound Dehiscence: Separation of wound edges.
  • Hypertrophic Scarring/Keloid Formation.
  • Altered Sensation: Numbness or hypersensitivity.

⭐ Most common cause of flap failure is venous congestion/thrombosis, not arterial insufficiency.

High‑Yield Points - ⚡ Biggest Takeaways

• Reconstructive ladder: Guides soft tissue coverage choices, from simple closure to free flaps.
• Random pattern flaps: Blood supply from subdermal plexus, limited length-to-width ratio (e.g., 1.5:1).
• Axial pattern flaps: Incorporate a direct cutaneous artery; more reliable with greater length (e.g., groin flap).
• Fasciocutaneous flaps: Include skin, subcutaneous tissue, and deep fascia; robust blood supply.
• Muscle/musculocutaneous flaps: Provide bulk, good vascularity, and help control infection (e.g., latissimus dorsi).
• Propeller flaps: Perforator-based island flaps that rotate around the perforator for versatile coverage.
• Keystone flap: Perforator-based island flap, excellent for defects with moderate skin laxity nearby.