...Integumentary Disorders Anatomy of the skin The skin consists of 3 layers: 1. Epidermis- non vascular outermost layer, continuously dividing cells 2. Dermis- takes the largest portion of the skin and provides strength and structure. It consists of glands (sebaceous, sweat), hair follicle, blood vessels, and nerve endings 3. Subcutaneous tissue (hypodermis)- the inner most layer. contains major vascular networks, fat, nerves, and lymphatics Function of the skin • Protection- protection of underlying structures from invasion by bacteria, noxious chemicals and foreign matter. • Sensory perception- transmits pain, touch, pressure, temperature, itching, etc • Fluid balance (excretion)- absorption of fluids and evaporation of excess. • Temperature regulation- produced heat released through skin by radiation, conduction, and convection 1|Page • Vitamin synthesis- skin exposed to ultra violet light can convert substances necessary for synthesizing vitamin D3 (cholecalciferol). • Aesthetic- affects appearance Factors influencing skin integrity • Immoblity is the major factor leading to pressure sore development . • The pt who is confined to bed & unable to change position is at greatest risk . • Trauma most likely occur – over the prominent areas – weight bearing areas • • Prolonged pressure impairs blood flow to tissue & resulfs in ischemia & inferction The extent of pressure necessary to cause tisue damage...
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