Healing Process

Healing Process

  • The final phase of the inflammation process is healing
  • Healing includes two major components:
    • Regeneration
      • Replacement of lost cells and tissues with cells of the same type
    • Repair
      • Occurs by primary, secondary, or tertiary intention
        • Primary intention – When wound margins are neatly approximated, as in a surgical incision or a paper cut
        • Secondary intention – From trauma, ulceration, and infection have large amounts of exudate and wide, irregular wound margins with extensive tissue loss
        • Tertiary intention (delayed primary intention) – Contaminated wound is left open and sutured closed after the infection is controlled, and when a primary wound becomes infected, is opened, is allowed to granulate, and is then sutured

Complications of wound healing

  • Adhesions 
    • Bands of scar-like tissue that form between two surfaces inside the body and cause them to stick together
  • Contractions
    • Excessive fibrous tissue formation due to shortened muscle tissue
  • Dehiscence
    • When a surgical incision reopens, either internally or externally, or when a primary healing site bursts open
  • Evisceration
    • When wound edges separate to the extent that intestines protrude through wound
  • Hypertrophic scars
    • Overabundance of collagen is produced during healing that results in large, raised red and hard scars
  • Keloid formation
    • Extra scar tissue grows, forming smooth, hard growths without any tendency to subside
  • Hemorrhage
    • Abnormal internal or external blood loss caused by suture failure, clotting abnormalities, dislodged clot, infection, or erosion of a blood vessel by a foreign object (tubing, or drains) or infection process


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