minimal UVR dose that causes clearly marginated redness in irradiated site 1

Minimal uvr dose that causes clearly marginated

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minimal UVR dose that causes clearly marginated redness in irradiated site (1 exposure)Calculate SPFScale2MEDbright erythema4MEDpainful sunburn8MEDsunburn with blistersSun Protective Factor (SPF 2-50+)degree of protection from sun is related to SPFProtection against UVBSPF= more effective in preventing a burnSPF 6stay in sun 6x > it normally takes to burnMax SPF 50+ lack of evidence with SPF >50 give better protection“Broad-spectrum” if pass SPF and UVA protection in relation to UVB protectionBS with SPF >15 can claim to reduce skin cancer risk and early skin agingNon- BS and BS SPF 2-14only UVB protectiononly claim to prevent sunburnAbility to be effective during extended swimming, sweating exercising
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Cream-basedmore resistance to water removal than alcohol baseWater-resistanteither 40 or 80min when swimming or sweatingNot water-resistantmust state to wear water-resistant product while swimming or sweatingCannot label: WATERPROOF, SWEATPROOF, SUNBLOCKCannot claim immediate protection on application or protection >2hours withoitreapplication without FDA approvalFDA recommends BS with SPF > 15Dermatology recommends BS, water- resistant SPF >30 every dayDescribe the different types of sunscreen Chemicalfilm on skin which ABSORBS UVR and therefore block UVR transmission to epidermisAminobenzoic Acid & DerivativesUBV coverageno photosensitivity protectionAka “PABA”not used oftensensitivity reactionsDerivative Padimate OAnthramMeradimateweak UVA2combined with other sunscreens to provide broader coverage
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  • Spring '17
  • Sunscreen, sunburn, Erythema, Azithromycin macrolides

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