Skin Integrity and Wounds Flashcards
1
Q
Epidermis
A
- protective waterproof layer of keratin
- cells have no blood vessels of their own
- regenerates easily and quickly
2
Q
Dermis
A
- elastic tissue made mainly of collagen
- nerves, hair follicles, glands, immune cells, blood vessels
3
Q
Subcutaneous
A
- anchors skin layers to underlying tissue
4
Q
functions of skin
A
- protection
- body temp regulation
- psychosocial
- sensation
- immunologic
- vitamin d prodution
- absorption
- elimination
5
Q
factors affecting skin integrity
A
- unbroken, healthy skin and mucous membranes defend against harmful agents
- resistance to injury affected by age, amount of tissue, illness
- adequately nourished/hydrated cells resistant to injury
- adequate circulation
6
Q
developmental considerations
skin
A
- maturation of epidermal cells is prolonged, leading to thin, easily damaged skin
- circulation and collagen formation are impaired, leading to ⬇️ elasticity and increased risk for tissue damage from pressure
7
Q
causes of skin alterations
A
- very thin and very obese people more susceptible to skin injury especially in skin folds
- fluid loss during illness causes dehydration
- jaundice causes yellow, itchy skin
- diseases of skin (eczema/psoriasis) cause lesions requiring special care
8
Q
types of wounds
A
- intentional (surgical) or unintentional (traumatic)
- neuropathic or vascular
- pressure related
- open or closed
- acute or chronic
- partial thickness, full thickness, complex
9
Q
phases of wound healing
A
- hemostasis
- inflammatory
- proliferation
- maturation
10
Q
hemostasis
A
- immediately after injury
- vasoconstriction, clotting begins
- exudate is formed, causing swelling and pain
- ⬆️ perfusion leads to heat and redness
- platelets stimulate other cells to migrate to site of injury
11
Q
inflammatory phase
A
- after hemostasis, lasts 2-3 days
- WBCs move to wound (leukocytes and macrophages)
- macrophages injest debris and release growth factors that attract fibroblasts to fill the wound
- exudate accumulates, pain, swelling, redness
- generalized body response
12
Q
proliferation phase
A
- several weeks
- new tissue is built by fibroblasts
- capillaries grow across the wound
- thin layer of epithelial cells forms across wound
- granulation tissue forms foundation for scar tissue
13
Q
maturation phase
A
- begins approx 3 weeks after injury, leasts months to years
- collagen is remodeled
- new collagen tissue depositied, compressing the blood vessels which causes a scar
14
Q
what is a scar?
A
- flat, thin, white line
- avascular collagen tissue that does not sweat, grow hair, or tan in the sunlight
15
Q
local factors affecting wound healing
A
- pressure
- desiccation (dehydration)
- maceration (overhydration)
- trauma
- edema
- infection
- excessive bleeding
- necrosis
- presence of biofilm