Chapter 2-The Healing Process Flashcards
mechanism of injury
cause of the injury or the manner in which the injury occurs
3 common mechanisms of injury
Compression, separation (tensile), and shear forces
compression force
tissue is crushed in between two or more objects
tension force
structure is pulled apart from either one or both ends
shear force
1 or more forces move across the tissues
3 phases of healing
inflammatory, fibroblastic repair, and maturation remodeling phrase
inflammatory phase
- 1st phase of healing process for acute injuries
- up to 4 days to complete
1. vasoconstruction immediately occurs, then vasodialation
2. pain, redness, swelling, etc occur due to exudate
3. chemical mediators reduce exudate
4. ends w/ phagocytes debriding the area
vasoconstruction
- blood vessels become narrowed (histamine)
- increases blood flow to injured area
vasodialation
blood vessels become larger
exudate
- formed by plasma fluid and cells
- located in space outside blood vessels
ecchymosis
black and blue, bruise like color of skin during internal bleeding
fibroblastic repair phase
- up to 6 wks
1. decrease in symptoms from 1st phase
2. capillaries form and bring O2; ROM increase
3. Collagen reforms and gains strength from fibroblast construction
maturation-remodeling phase
- starts 3wks later and can take years to complete
1. organization of collagen scar tissue
2. Scar strengthens and decreases in size
Signs
physically observable and objective
Symptoms
not physically observable, but are subjective to the injured person
