12 - Ultraviolent

Question 1

Ultraviolet Radiation

Answer 1

EM radiation between X-rays and visible light

Question 2

UV Therapy

Answer 2

• Tx of dermatoses
• Phototherapy = use of artificial UV light for therapeutic purposes
• Photochemical effect = use of artificial UV light with a chemical photosensitizingagent for therapeutic purposes

Question 3

UVA

Answer 3

• PUVA = Carcinogienic
• UVA1 = Declining use

Question 4

UVB

Answer 4

• BBUVB = Declining us
• NBUVB = Less cancer risk, more common

Question 5

UVC

Answer 5

• Photogermicidal
• Not commonly used

Question 6

Ultraviolet radiation

Answer 6

• Absorbed in 1 – 2 mm of skin
• Physiologic effects = very superficicial
  
  • Alters biochemistry and metabolism
  • May cause cell damage and death
  • Inflammatory reaction
  • Increased capillary permeability
• Skin should be tested fist

Question 7

Minimal erythema dose

Answer 7

faint redness 24 hours after Tx

• Can also estimate dose based on Fitzpatrick’s Skin Phototype

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Question 8

Ultraviolet indications

Answer 8

• Psoriasis
• Atopic dermatitis
• Vitiligo
• Mycosis fungoides

Question 9

UV contraindications

Answer 9

• Over the eye
• Malignant skin
• History of melanoma
• SLE, herpex
• Tuberculosis
• Kidney, cardiac, and liver diseases
• Hyperthyroidism
• Diabetes mellitus
• Acute eczema or dermatitis

Question 10

Photosensitizing Drugs

Answer 10

• Antibacterial/antimicrobial
• Thiazide diuretics
• Other meds
  
  • Phenothiazine – tranquilizers
  • Psoralens – psoriasis
  • Sulfonylureas
  • Diphenhydramine