Study UV Radiation (PTA 102) Flash Cards

 
Pile Management Card
UV Radiation (PTA 102)

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AKA Leukoderma
VITILIGO
A chronic skin condition that causes loss of pigmentation resulting in patches of pale skin?
VITILIGO
Erythema?
REDNESS OF THE SKIN
No change in skin redness. Occurs in the 24 hours after UV exposure?
SUBERYTHEMAL DOSE
This does is generally about 10 times the MED?
THIRD DEGREE ERYTHEMA
Erythema with severa blistering, peeling, and exudation?
THIRD DEGREE ERYTHEMA
This dose is generally 5 times the MED?
SECOND DEGREE ERYTHEMA
Intense erythema with edema, peeling, and pigmentation appears within 2 hours or less after treatment and is like a severe sunburn?
SECOND DEGREE ERYTHEMA
This does is about 2.5 times the MED?
FIRST DEGREE ERYTHEMA
Definite redness with some mild desquamation appears within 6 hours after exposure and lasts for 1-3 days?
FIRST DEGREE ERYTHEMA
MED?
MINIMAL ERYTHEMAL DOSE
SED?
SUBERYTHEMAL DOSE
How long should patients wear UV opaque eye protection for after administration of psoralen?
12 HOURS TO PROTECT EYES FROM SUNLIGHT
Conjunctivitis?
AN INFLAMMATION OF THE INSIDES OF THE EYELIDS
Photokeratitis?
AN INFLAMMATION OF THE CORNEA THAT CAN BE EXTREMELY PAINFUL

GENERALLY APPEARS 6-12 HOURS AFTER UV EXPOSURE

RESOLVES AFTER 2 DAYS
Photokeratitis and conjunctivitis can occur after exposure to what?
UVB
UVC
UV irradiation can cause what kind of eye damage?
-PHOTOKERATITIS
-CONJUNCTIVITIS
-CATARACTS
Premature aging of the skin is known as?
ACTINIC DAMAGE
When shoud UV irradiation be repeated?
SHOULD NOT BE REPEATED UNTIL THE ERYTHEMAL EFFECTS OF THE PREVIOUS DOSE HAVE RESOLVED
What happens if patients are taking photosensitizing medications?
THEY HAVE INCREASED SENSITIVITY TO UV RADIATION
Give two examples of photosensitizing medications?
-TETRACYCLINE
-GOLD BASED MEDICATIONS
What kind of treatment is psoriasis most responsive to?
MOST RESPONSIVE TO UVA ADMINISTERED IN CONJUNCTION WITH ORAL OR TOPICAL PSORALEN SENSITIZATION (PUVA)
How does rickets occur?
-INADEQUATE EXPOSURE TO UV RADIATION
-INADEQUATE INTAKE OF PROVITAMINS
-POOR KIDNEY FUNCTION
Epidermal hyperplasia is most pronounced in what kind of exposure?
UVB
When does epidermal hyperplasia take place?
72 HOURS AFTER EXPOSURE
A thickening of the superficial layer of the skin is known as?
EPIDERMAL HYPERPLASIA
A delayed pigmentation of the skin is known as what?
TANNING
Because patients vary in their degree of erythemal response to UV, what must be done first?
A MINIMAL ERYTHEMAL DOSE (MED) MUST BE DETERMINED
Erythema is a result of what?
DILATION OF THE SUPERFICIAL BLOOD VESSELS CAUSED BY THE RELEASE OF HISTAMINE.

(HISTAMINE IS A VASODILATOR)
Erythema is produced during what type of UV exposure?
UVB

OR AFTER UVA EXPOSURE AFTER DRUG SENSITIZATION
UV radiation produces what in the skin?
-SKIN ERYTHEMA
-TANNING
-EPIDERMAL HYPERPLASIA
-VITAMIN D SYNTHESIS
What form of UV can penetrate deeper?
UVA
True/False

The penetration of UV is generally greater is the skin is darker?
FALSE

IF SKIN IS DARKER THEN UV RADIATION WILL BE OF LESS PENETRATION
When using UV radiation, when is the penetration deepest?
HIGHEST INTENSITY, LONGEST WAVELENGTH, LOWEST FREQUENCY
When heating the skin, when is the intensity of the UV lamp highest?
HIGHEST WHEN USING A HIGH POWERED LAMP POSITIONED CLOSE TO THE PATIENT WITH THE RADIATION BEAM PERPINDICULAR TO TEH SKINS SURFACE
True/False

UV does not produce heat?
TRUE
UVC is AKA?
SHORT-WAVE UV
This UV band is considered germicidal?
UVC
What UV band produces the most skin erythema?
UVB
UVB is AKA?
MIDDLE WAVE UV
Produces fluorescence in many substances?
UVA
UVA is AKA?
LONG WAVE UV
UV radiation is divided into three bands which are?
UVA
UVB
UVC
This frequency band is absorbed by all skin colors and also has a low carcinogenic effect?
UVC
When UV is used for wound treatment, what frequency band is used?
UVC
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