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Mechanics of Tissue Healing<br />Tissue injury <br />Pain inflammatory mediators<br />
Soft Tissue Healing<br />Three Phases<br />Inflammatory Phase<br />Regeneration Phase (Proliferation)<br />Remodeling Phas...
Inflammatory Phase<br />Normal and Essential Component <br />2-3 Days before gradually resolving<br />Local Vasoconstricti...
Regeneration Phase<br />Growth of new tissue<br />4th-5th day – weak connective tissue has formed over injury site.<br />P...
Remodeling Phase<br />Often overlooked in terms of importance<br />Longest duration <br />Healing occurs for 1 year or mor...
CutaneousWound Healing<br />
Muscular Healing<br />Healing is similar to other tissues<br />Hemorrhage/Edema<br />By Phagocytosis<br />Adhesions inhibi...
Tendons and Ligaments<br />Tendons require less blood supply than muscles to function, they take more time to heal.<br />L...
 ESSAY Questions<br /> <br />1. Describe goal setting and why it is important during rehabilitation.  (4)<br /> <br />2. W...
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Mechanics Of Tissue Healing Sp09

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Mechanics Of Tissue Healing Sp09

  1. 1. Mechanics of Tissue Healing<br />Tissue injury <br />Pain inflammatory mediators<br />
  2. 2. Soft Tissue Healing<br />Three Phases<br />Inflammatory Phase<br />Regeneration Phase (Proliferation)<br />Remodeling Phase (Maturation)<br /><ul><li>Bleeding Phase </li></ul>Short lived <br />6-8 hours<br />Vascular (muscular) bleeds longer (24+hrs)<br />Ligament bleeds less<br />
  3. 3. Inflammatory Phase<br />Normal and Essential Component <br />2-3 Days before gradually resolving<br />Local Vasoconstriction (shock)<br />Zone of Primary Injury<br />Necrosis – death of tissue from lack of O2<br />Vasodilation<br />Zone of Secondary Injury<br />Leukocytes<br />Ingest dead cells/foreign and infectious<br />Phagocytosis<br />Conective tissue carrying heparin/histamine<br />Bradykinin<br />Stimulates nerve endings to cause pain<br />
  4. 4. Regeneration Phase<br />Growth of new tissue<br />4th-5th day – weak connective tissue has formed over injury site.<br />Production of scar (collagen) tissue<br />Rapid onset 24-48 hrs<br />Takes longer to peak <br />2-3 weeks<br />the more vascular the tissue, the shorter the time taken to reach peak proliferative.<br />Reduces strength approx. 30%<br />Decreases flexibility<br />Runs from the first day or two post injury through to its peak at 2-3 weeks and decreases <br />Hematoma size sufficiently diminishes<br />
  5. 5. Remodeling Phase<br />Often overlooked in terms of importance<br />Longest duration <br />Healing occurs for 1 year or more!<br />Begins at same time as the peak of the proliferative phase (2-3 wks)<br />Possibly even earlier (1-2 wks)<br />Chemical levels return to normal<br />
  6. 6.
  7. 7. CutaneousWound Healing<br />
  8. 8. Muscular Healing<br />Healing is similar to other tissues<br />Hemorrhage/Edema<br />By Phagocytosis<br />Adhesions inhibit muscle fiber regeneration<br />Muscle may only regain 50% pre-injury strength<br />Rehabilitation Length<br />Fairly lengthy<br />6-8 weeks<br />
  9. 9. Tendons and Ligaments<br />Tendons require less blood supply than muscles to function, they take more time to heal.<br />Ligament damage is a lengthy process<br />Joint instability<br />Atrophy <br />Increased risk of RE-Injury<br />
  10. 10. ESSAY Questions<br /> <br />1. Describe goal setting and why it is important during rehabilitation. (4)<br /> <br />2. What things can be done to address the psychological aspects of dealing with an injured athlete? (5)<br /> <br />3. Explain H.O.P.S. – Give 2 examples of each (8)<br />4. What is the difference between zone of “primary” and “secondary” injury? (4)<br />5. Why is scar tissue healing less desired? (4)<br />

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