Dermatologic Disorders Flashcards
Dermatological Disorders
Any disorder or condition that impairs the skins ability to perform it’s functions
May involve: Pressure Ulcers Overgrowth of scar tissue Inflammatory conditions Infections (bacterial/ viral/ fungal) Thermal injuries Insect bites
Skin & Aging
Aging results in: Loss of elasticity and dermal thickness ↓ Melanocytes loss of barrier function Atrophy of apocrine & sebaceous glands ↓ Fibroblasts & collagen ↓ Cell proliferation & diminished blood supply
End result:
Thinner, drier, pale skin with wrinkles, loss of UV protection & delayed wound healing
Pressure Ulcers (decubitus ulcers)
Ischemic ulcers resulting from: Unrelieved pressure Friction & shear forces Moisture Immobilization Malnutrition Impaired profusion
Pressure Ulcers continued
Occur over bony prominences
Occluded blood flow & O2 due to pressure
Result in non-blanchable reddened area
Extend to a full thickness skin loss exposing muscle, bone
Stage 1 Pressure Ulcer
Non-blanchable area of erythema
Skin is intact over the bony prominence
Stage 2 Pressure Ulcer
Partial thickness skin loss
Involves epidermis or dermis
Erosion or blistering
Stage 3 Pressure Ulcer
Full-thickness skin loss with damage or necrosis to subcutaneous tissue
Stage 4 Pressure Ulcer
Full-thickness tissue loss exposing muscle, bone, or supporting structures
With or without undermining & tunneling
Keloids
Round, firm, elevated scars
Feature irregular claw-like margins (claw-like prolongations)
Extend beyond the site of injury
**Excessive amounts of collagen during tissue repair
Genetically influenced & more common in dark pigmented skin types
Can appear weeks to months after a scar has formed
Become more symptomatic
Hyperthropic Scars
Elevated red fibrous lesion
Does not expand beyond border of injury
Genetically influenced
Tends to regress within a year
