phototherapy Flashcards
1
Q
what can exposure to UV light (sun, tanning beds) cause?
A
-skin damage and cancer
2
Q
what is the UV DNA damage pattern for direct DNA damage by UVB?
A
-pyrimidine dimer
3
Q
what is the UV DNA damage pattern for indirect oxidative DNA damage by UVA?
A
C > A base change (indirect oxidative DNA damage by UVA)
4
Q
what affect does controlled skin exposure to specific wavelengths of UV light have?
A
anti inflammatory effect
5
Q
which penetrates deeper: UVA or UVB?
A
UVA
6
Q
what is taken with UVA to enhance the effect?
A
Psoralen
7
Q
how often is UVA administered?
A
twice weekly
8
Q
Does UVA or UVB exposure give you more of a chance of getting skin cancer?
A
- UVA has increased skin cancer risk
- UVB has no increased cancer risk
9
Q
is a narrow or wide UVB band more effective?
A
narrow UVB band
10
Q
how often is UVB given?
A
three times a week
