Midterm #1 Flashcards
Layers of the skin
Outer Epidermis & Stratus Corneum (hair/sebaceous glands/sweat glands pass through this layer but originate in dermis)
Dermis (contains capillary network)
Subcutaneous Tissue
5 Functions of the skin
Protection Thermoregulation Elimination of wastes Synthesis of Vit.D Sesnation/communication
Risk factors affecting skin
Age Dryness Nutrition/Hydration Disease Environment
Age related changes in the skin
Increased dryness Decreased sebum Epidermal thinness Loss of elasticity Decreased tissue tolerance
What is pressure?
Interventions for pressure.
Direct force on an area
Interventions: "offloading" Turn Q2h Position bed at 30 degrees Pillows between bony prominence's
What is friction?
Where does damage occur?
Rubbing of one surface against another
Skin damage occurs to epidermal/upper dermal layers
Elbows/heels at greater risk
Looks like a blister or an abrasion
What is shearing?
Where does damage occur?
Underlying bones and soft tissues above them move in opposite directions
Damage occurs at deep fascia level over-top bony areas
How does moisture cause skin breakdown?
Interventions?
Interferes with the process of wound healing
Decreases the resiliency of the epidermis to external forces.
Interventions:
Use moisture barrier/absorbent pads
Keep moist skin surfaces apart
Do NOT use Telfa
How does protein promote healing?
Used to build new tissue
Makes skin strong to prevent trauma
Prevents infection
How does Zinc help with healing?
Builds & binds tissue to give it strength
Helps fight infection
How do carbohydrates aid healing?
Source of energy for body & collagen formation
Prevents protein from being used as source of energy
How do fats aid healing?
Source of energy for the body
Helps absorb vitamins
How do fluids aid healing?
Prevents dehydration by replacing the fluid lost in wound drainage
Maintains adequate circulation of blood and nutrients to the wound
Vits A/C role in wound healing
Promotes strength
Helps fight infection
Interventions for dry skin
skin cleanser with pH 4-7 Liquid soap vs bar no rinse cleanser daily moisturizing protect skin with barrier ointment promote nutrition/hydration
How can wounds be classified?
according to cause: abrasion incision laceration open incision contusion penetrating puncture septic etc.
Difference between acute and chronic wounds.
Healability? Host?
Acute: heal within 12 weeks, usually a health host
Chronic: will take longer than 12 weeks - usually months to years, usually underlying conditions & may never heal if underlying pathology never corrected.
What does wound healing depend on?
Type of damage done, and type of tissue damaged
Phases of wound healing
1) Hemostasis
2) Inflammation
3) Proliferation
4) Remodeling/maturation
Hemostasis
Day 0
clotting cascade initiated in response to stem blood loss
Inflammation
Day 0-4
characterized by heat, swelling, redness, pain, loss of function at wound site
Proliferation
Day 4-21
involves granulation/angiogenesis/epithelialization
quick phase when no infection present
Proliferation– Granulation
Day 3-14
granulation tissue forms: combo of fibroblasts/inflammatory cells/new capillaries/fibronectin/hyularonic acid
Proliferation – Angiogenesis
new blood vessels form from pre-existing vessels
Collagen increases from day 3 to 3 months
Fibroplasia occurs parallel to revascularization
Endothelial cells migrate forming capillary buds then loops