2.3 Healing Flashcards
1
Q
What are the 3 types of Healing?
A
- Resolution
- Regeneration
- Replacement
2
Q
Def. RESOLUTION
A
Minimal tissue damage
Tissue returns to normal
3
Q
Def. REGENERATION
A
Damaged tissue replaced with functional cells
4
Q
Def. REPLACEMENT
A
Functional tissue replaced with scar tissue
Function = lost
5
Q
Def. HEALING BY PRIMARY INTENTION
A
- Healing that occurs when a clean laceration (paper cut) or a surgical incision is closed (with sutures = wound edges kept close together, healing occurs simultaneously)
6
Q
Def. HEALING BY SECONDARY INTENTION
A
- Large break in tissue w/ more inflammation (pressure ulcer, etc)
- Wound heals from BOTTOM UP/INSIDE OUT
- Greater risk for infection/scarring
- longer healing period
7
Q
What are the 2 phases of healing?
A
- Proliferative Phase
- Remodeling Phase
8
Q
Proliferative phase
A
- Foreign material & debris removed by phagocytosis
- Granulation tissue grows
- 3-4 days after injury
- Lasts for 2 weeks
9
Q
Remodeling phase
A
- onset depends on wound size & if it was closed or opened
- starts 2 weeks after injury
- can last up to 2 years
10
Q
What are the factors that promote healing?
A
- youth
- good nutrition (protein, vit a & c)
- adequate hemoglobin
- effective circulation
- clean, undisturbed wound
- no further infection/trauma to site
11
Q
What are factors that impede healing?
A
- hemorrhage (escape of blood from ruptured blood vessel)
- hypovolemia (decreased blood circulation)
- altered nutritional state
- infection
- impaired collagen synthesis
- impaired epithelialization
12
Q
What does scar tissue replace, and result in?
A
- scar tissue replaces normal, functioning skin cells
- it results in a loss of function & normal cells/specialized structures
13
Q
What do complications of healing include?
A
- Hypertrophic scar tissue (keloids)
- Ulceration
14
Q
What is a complication of surgical wound healing?
A
Dehiscence
15
Q
Def. Dehiscence
A
The reopening of a surgical wound
