integumentary system pathophysiology
TRANSCRIPT
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Integumentary System
Altered Functions
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Vocabulary
Derma-
Melan/o-
Pachy-
Sub-
trich/o-
Cyan/o-
Onych/o-
Xer/o-
Hidr/o-
Kerat/o-
Xanth/o-
Follicul/o-
Dactyl/o-
Intra-
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Integumentary Regions
Skin– Epidermis– Dermis
HypodermisSensory receptorsMuscleAdnexa– Hair and follicle– Glands
• Sweat• Sebaceous
– Nails
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Epidermis Histology Overview
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Epidermis Strata Histology
C = corneumG = granulosumS = spinosumB = basale
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Underlying Disorders
Genetic
Connective tissue
Blood supply
Neoplasia
Drug Reactions
Immune
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Primary Lesions
Macules: colored circumscribed flat area, size varies, < 1cmPapules: discolored raised area, < 2cmPlaques: raised flat top area, > 1cmPatches: circumscribed flat area of discoloration, < 1cmNodules: solid raised area, above or below skin, <1 cmTumor: discolored raised area, > 2cmWheals: slightly raised area with edema, size variesVesicles/Blister: fluid filled raised area < 0.5cmBulla/Cyst: fluid filled raised area, > 0.5cmPustules: pus-filled raised area, size varies
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Macule
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Nodule
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Papule
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Bulla
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Secondary Lesions
Erosions
Ulcers
Fissures
Cracks
Scales
Excoriation
Keloid
Scar
Lichenification
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Cracks and Fissures
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Ulcer and Erosion
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Excoriation
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Lichenification
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Scar Formation
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Keloid
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Epidermal Cells
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Keratinocytes
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Keratinocyte Hypertrophy
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Melanocyte location and function
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Melanosomes with Melanin
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Melanin
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Melanosis
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Langerhans Dendritic Cells
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Skin Cancers
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Skin Cancer ABCD and E (evolving)
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Etiology
UV exposure – UV A– UV B
GeneticPrevention– Sun block
• UVA• UVB
– Clothing– Window tinting
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Skin Tumors
Benign– Seborrheic keratitis
– Keratocanthoma
– Verucae (warts)
– Actinic keratitis
Malignant– Basal Cell carcinoma
– Squamous Cell carcinoma
– Dysplastic nevi
– Malignant melanoma
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Seborrheic Keratosis
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Keratocanthoma
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Verrucae
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Actinic Keratitis
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Basal Cell Carcinoma
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Squamous Cell Carcinoma
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Epidermal Cancers Compared
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Malignant Melanoma
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Merkel Cell Carcinoma
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Dermis
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Dermal Papilla and Reticular Dermis
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Lines of Cleavage
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Aging = Wrinkles?
Skin changes– Chronological aging
– Photo-aging (sun damage)
– Chemical toxins
Cause– Decrease in collagen
(inactive fibroblasts)
– Increase in proteolytic activity due to collagenase
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Hypodermis
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Subcutaneous tissue
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Clinical Application
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Dermatitis (Eczema)
Atopic
Contact
Seborrheic
Drug eruption
Photo-eczematous
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Dermatitis reactions
Presentation Papulovesicular Oozing with crusts Scaling plaques
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Contact Dermatitis
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Seborrheic Dermatitis
Dandruff; Cradle Cap
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Drug Eruption
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Photoeczematous
UV
Genetic: Porphyria
Drug Induced– Oral– Topical
Lupus
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Venous Stasis Dermatitis
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Cutaneous Membrane
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Insect Bites
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Chiggers
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Biting Flies
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Mosquitoes
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Spider Bites
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Bacterial Lesion Appearance/ Causes
Furunculosis
Folliculitis
Impetigo
Cellulitis
Staph aureus
Pseudomonas
Gram (-) enterics
Beta hemolytic Strep
Mycobacterium
Clostridium
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MRSA
Bacteria: Staph. aureus
Disease: Pyodermas
Transmission:– Direct, topical
– Open wound entry
Culture and Sensitivity ID
Drug Resistance– Beta lactamase
– Alternate method of cell wall synthesis
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VRE
Vancomycin
Risk factors– Hospitalization
– Immunocompromised
– Neutropenia
– ICU
– Dialysis
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Impetigo
Staph; Strep
Cut or scratch
Honey colored oozing sores
Lip / nose region
After a cold
Scratching can spread to other areas
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Cellulitis
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Gangrene
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Streptococcus
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Leprosy
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Erysipelas
Group A Strep
Cellulitis
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Necrotizing Fasciitis
Strep pyogenes
Fascial planes
Source– Skin
– Bowel
Aka, Streptococcal gangrene
Post op concern
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Scarlet Fever
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Fungal Infections
Microsporum
Trichophyton
Epidermophyton
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Microsporum
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Trichophton
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Tinea Capitus
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Tinea corpus
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Tinea pedis
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Epidermatophyton
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Candida albicans
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Viral Infections
Papilloma
Herpes
Morbillivirus
Rubella
Parvovirus
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HPV
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Papilloma
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Herpes: HSV-1, HSV-2
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Herpes: Varicella Zoster Virus
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Shingles
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Rubeola
Paramyxovirus
5 day or hard measles
Respiratory spread
Exanthem rash– White spots in red
Fever; cough
Neurological
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Rubella
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Erythema Infectiosum (Fifth Disease)
Parvovirus B19
Mild rash (slapped cheek– Face– Limbs– Trunk
Respiratory secretions – direct contact spread
Pain, fever, itching
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Idiopathic/Immune
Acne
Psoriasis
Rosacea
Pemphigus
Scleroderma
Erythema multiforme
Vitiligo
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Acne Vulgaris
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Propionibacterium acnesStaph epidermidis
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Psoriasis
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Rosacea
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Pemphigus
Autoimmune
Blistering
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Scleroderma
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Erythema Muliforme
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Vitiligo
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Urticaria
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Porphyria
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Genetic Enzyme Deficiency
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Adnexa
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Sweat Glands
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Hair and Follicle
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Hair/ Follicle Disorders
AlopeciaGenetic: baldness– Male– Female
HirsutismParasiticInfectious– Bacterial– Fungal
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Folliculitis
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Scabies
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Pediculosis
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Head Louse
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Body Louse
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Nail Disorders
Clubbing
Paronchyma
Onchomycosis
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Clubbing
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Fungal Infections
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Sensory
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Burn Classification
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Skin Layers Affected
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Rule of 9’s
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Artificial Skin
HormoneEGF:EpidermalGrowth Factor
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Frostbite
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Injury
Blunt force trauma: blows, impact injuryContusionAbrasionLacerationSharp Force– Incised wound– Stab wound– Puncture wound
GSW
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Puncture Wound
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Laceration
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Wounds compared
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GSW
Entrance Wound Exit Wounds
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Summary
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Process and Timeframe
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Histology of Repair
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Suture
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Questions?
Fish Spa