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Details

Photobiology
Photobiology-Derm
14
Physiology
Professional
12/02/2010

Additional Physiology Flashcards

 


 

Cards

Term

 

 

UVC (100-290nm)

Definition

 

  1. Germicidal
  2. Blocked by ozone
  3. Highest energy causing DNA damage (carcinogenic), potentially lethal

Term

 

UVB (290-320nm)

Definition

 

 

  1. Causes sunburn, skin cancer, photoaging, photosensitivity, vit D synthesis
  2. Used for phototherapy in psoriasis & vitiligo (immunosuppressive)
  3. Blocked by clear glass in home & car windows

Term

 

 

UVA (320-400nm)

UVA2 (320-340)

UVA1 (340-400)

 

Definition


  1. Causes immediate pigment darkening, drug photosensitivity, photo-allergy, photoaging, skin cancer, responsible for porphyria cutanea tarta
  2. Used in PUVA for cutaneous T-cell lymphoma, psoriasis, alopecia totalis
  3. Passes through clear glass

 

Term

 

 

UV exposure

Definition

Latitude:   closer to equator = more direct UV exposure

Atmosphere conditions:  cloudy days may only reduce UV by 20%

Time of day:  sun is strongest btwn 10:00-4:00

Reflection:  80% of suns rays are reflected by surfaces: Snow, Sand, Water, pavement

Humidity:  wet stratum corneum transmits more UVB

Seasonal:  Maximal day is summer solstice=June 21st  (minimum = Dec 21st

 

Term
[image]
Definition

 

Polymorphous Light Eruption

Term
[image]
Definition

 

 

Actinic Prurigo

Term
[image]
Definition

 

 

Actinic Prurigo II

Term
[image]
Definition

 

 

Chronic Actinic Dermatitis

Term
[image]
Definition

 

 

Lupus Erythematosus 

Term
[image]
Definition

 

 

Psoriasis 

(Post-sunburn)

Term
[image]
Definition

 

 

Photoonycholysis 

Term
[image]
Definition

 

 

Rosacea

(sun sensitivity)

Term
[image]
Definition

 

 

Urticarial Lesions

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