skin, hair, nails Flashcards
anatomy of the skin
epidermis, dermis, subcutaneous
types of hair
vellus, terminal
what is hair made of?
keratin, dead cells
nails
hard plate of keratin, protects fingers and toes, angle of nail bed should be 160 degrees
ROS, health history questions
past history of skin disease? excessive dryness? rash or lesions? change in nails? etc.
inspection of skin
general pigmentation of skin, expected v. unexpected findings
pallor
pale or grey or yellow brown, caused by anemia or circulatory issues
erythema
may appear red or purple, caused by inflammation
cyanosis
blue or purple undertones, caused by lack of oxygen
jaundice
yellowish skin, caused by bilirubin
petechia
small round reddish dots, caused by bleeding under skin
palpation of skin
temperature, moisture, texture, edema, turgor
turgor
pinch large fold of skin below clavicle, should return promptly when released, reflects elasticity and hydration
edema
fluid in the extremities, push with your thumb, note how long it stays (1-4 scale)
expected skin findings
skin is smooth, intact, uniformly dry, warm, instant return with skin turgor
expected variations of skin
acne, wrinkles, scars, older people may have more elastic skin
unexpected findings of skin
velvet skin, roughness or flaky, diaphoresis, skin lesions, hypothermia, hyperthermia, skin tenting, edema
vitiligo
acquired skin condition that is loss of pigment in skin
primary skin lesions
macules, papules, patches, plaques, nodules, wheals, tumors, urticaria, vesicles, cysts, bullas, pustules
macules
solely a color change, flat, less than 1 cm
papules
felt and caused by superficial thickening of the epidermis
patches
macules that are larger than 1 cm
plaques
papules coalescing to form surface elevation wider than 1 cm
nodules
solid, elevated, hard or soft, greater than 1 cm that may extend deeper into dermis than papule
wheals
superficial, raised, transient and erythematous, irregular in shape due to edema
tumors
larger in diameter, firm or soft, deeper into dermis, may be benign or malignant
urticaria
wheals coalesce to form extensive pruritic reaction
vesicles
elevated cavity containing fluid up to 1 cm
cysts
encapsulated fluid filled cavity
bullas
larger than 1 cm, usually single chamber, superficial in dermis and ruptures easily
pustules
pus in cavity that is circumscribed and elevated
secondary skin lesions
debris on skin surfaces, break in continuity of skin surface
crust
thickened, dried out exudate
scale
compact flakes of desiccated skin from shedding of dead excess keratin cells
fissures
linear crack with abrupt edges extending into dermis
erosions
scooped out but shallow depression
ulcers
deeper depression extending into dermis with irregular shape, may bleed, leaves scar
excoriations
self inflicted abrasion that is superficial
scars
permanent fibrotic change after healing
keloids
benign excess of scar tissue beyond original injury
how to document skin lesions
color, elevation, pattern or shape, size, location and distributions, exudate
locations and distributions of lesions
annular, confluent, linear, grouped, zosteriform, target
annular/circular lesions
begins in center and spreads to periphery
confluent lesions
lesions run together
discrete lesions
distinct and separate
grouped lesions
cluster of lesions
gyrate lesions
twisted, coiled, or snakelike
target or iris lesions
resembles iris of eyes, concentric rings
linear lesions
scratch, streak, line, or stripe
polycyclic lesions
annular lesions grow together
zosteriform lesions
linear arrangement following a unilateral nerve route
pressure injuries stages
stage I - non blanchable erythema
stage 2 - partial thickness skin loss
stage 3 - full thickness skin loss
stage 4 - full thickness skin and tissue loss
risk factors for pressure ulcers
reduced sensory perception, moisture, reduced mobility, malnutrition, friction and shear, thin fragile skin
what to inspect in hair
color, texture, distribution, lesions
inspecting and palpating nails
profile signs, curved, clubbing, consistency, color, cap refil
capillary refill
should take less than 3 seconds
unexpected conditions of the nails
paronychia, beau line, splinter hemorrages, onychomycosis, late clubbing, pitting, color variations, delayed cap refill
acral lentiginous melanoma
skin cancer under the nail
ABCDE of skin cancer
asymmetry, borders, color variation, diameter greater than 6 mm, elevation/evolution, funny looking
red flags for skin
ABCDE of melanoma, sore that does not heal, skin changes over bony prominences, discoloration, new onset rash, expanding redness and heat around wound
unexpected hair conditions
AIDS related kaposi sarcoma; toxic alopecia; tinea capitis; traction alopecia; cradle cap, pediculosis capitis (lice), folliculitis barbae (razor bumps), hirsutism, furuncel and abscess