Define the etiologies of sun-induced skin disorders•UVCsmall amount reaches earth•UVBsunburn radiation•Most active wavelength for causing erythema•Vitamin D3 source in skin•Causes skin cancer, wrinkling, elastosis, collagen damage, epidermal hyperplasia•UVAphotosensitivity reaction if taking/applying photosensitizing medication•May cause more damage to tissue than UVB•Affects dermis > epidermis•Immune suppression and DNA damagepremature photoaging and skin cancer•UVR in tanning booths and Sunbeds•>96% UVA (less likely to produce redness)•Increase risk of skin cancer•No FDA regulation on amount of UVA and UVBonly ratio A:B > 5%•Radiation reflects•Snow•Sand•Dry clothes•70-90% of UVR penetrates clouds•Radiation Penetrates•Water•Wet clothestightly woven clothes the best•Higher altitudeless tree coveragemore UVR exposure•**UVA penetrates glassnot UVB•If taking Photosensitive drugsapply sunscreen while driving
•Explain the pathophysiology of sun-induced skin disorders•Melanomaself examination•A: asymmetric shape•B: border irregular or poorly defined•C: color variation or change in color•D: diameter bigger than 6mm•E: evolving/changing mole•Define the relationship between skin type and tanning history•Skin type and tanning history most important patient factor•Always burn easily; tan minimallySPF 30+•Swim, work outdoors, activityproduct must adherewater-resistant every 40-80min•Define the parameters of sunscreen efficacy•Minimal Erythema Dose (MED)
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- Spring '17
- Sunscreen, sunburn, Erythema, Azithromycin macrolides