Physical Assessment: Skin Exam Flashcards
Skin: Three Layers
Epidermis
Dermis
Subcutaneous Layer
Epidermis: 5 Layers
Stratum Corneum Stratum Luciderm Stratum granulosum Stratum Spinosum Stratum Basale
Dermis: Composition and Function
composition: living cells
Two Functions:
Perspiration
Supply Epidermis with nutrient rich blood
Dermis: Two layers
Papillary
Reticular
Subcutaneous Tissue: Composition and Function
Composition: Fat and loose CT
Function: Stabilizes skin
-insulates, stores energy, shock absorption
Skin: Changes with age
Looses vascularity
Blood vessels become thin
Skin becomes thinner, pale and translucent
Decrease in elasticity
Physical Assessment of skin
Color Temperature Dry/moist Legions? Skin folds (intertriginous)
Lesions: 3 types
Primary
Secondary
Vascular/ Purpuric
Primary Legions: Non palpable (2)
Macule: < 1cm (freckles)
Patch: > 1cm (birthmark)
Primary Legions: Palpable (3)
Papule: < 1cm
Plaque: often a collection of papules, >1cm
Nodule: Marble like, >0.5cm (deep and firm)
Primary Legions: With Fluid (3)
Vesicle: 1cm, serous fluid
Bulla: >1cm, serous fluid
Pustule: inside is pus (infection)
Primary Legions: Wheal
Irregular, superficial area of edema
Secondary Legions: 4 types involving skin loss
Crust: serum/pus/blood dried on skin
Erosion: chicken pox scar
Ulcer: deep, loss of epidermis and dermis, may go to bone
Fissure: Linear crack, only epidermal and dermal layer
Secondary Legions: Vascular vs Purpuric
Purpuric = think purple (bruise)
Vascular = think (think tiny veins)
Purpuric: Outside vessels -petechiae -ecchymosis Vascular: Within vessels -telangiectasia -spider vein -spider angioma -cherry angioma
Petechia
(purpuric) 1-3mm, red/purple. Non-blanching
Ecchymosis
(purpuric) >3mm, purple, non-blanching
Telangiectasia
(vascular) small, dilated blood vessels, blanching, 0.5-1mm: encompasses spider vein and spider angioma
Spider Angioma: size and location
(vascular) <2cm, face, arms and trunk
Spider Vein: Size and location
(vascular) Small to several inches, mostly on legs, chest.
Cherry angioma
(vascular) 1-3mm, trunk and extremities
Lesions: Arrangements (5)
clustered linear (line) annular (in a ring) arciform (in an arc) dermatomal (covering a skin band that corresponds to a nerve root)
Skin Tumors: 6 types
Actinic Keratosis Seborrheic Keratosis Basal Cell Carcinoma Squamous Cell Carcinoma Benign Nevus (Lentigo) Malignant Melanoma
Actinic keratosis
tumor: superficial hyperkeratonic papules, often multiple
1/1000 develop into squamous cell carcinoma
Seborrheic Keratosis
tumor: benign, white-yellow or brown raised papules. Typically multiple.
Basal Cell Carcinoma
tumor: although malignant, almost never metastasizes.
Begins as a macule, often on face
Squamous Cell Carcinoma
REDDER Macule, firm elevated border. Begin small, white legion. Slow growth at first, rapid and spread later on.