It is below the wavelength approx 400 nm
Ultraviolet Radiation
What is the range of radiant energy designated as UV extends?
180 nm to 400 nm
What are the physical behaviors of UVR?
Reflection
refraction
penetration
absorption
law of inverse square law
cosine law
This law states that if distance is farther, less intensity there is. Intensity of illumination varies with rhe square of distance between source and treatment surface
Law of inverse square law
Angle of incidence should be the as same as IRR, 90 degrees. Energy of illumination varies proportionally.
Cosine Law
What are the classifications of UVR?
near
Far
UV A
UV B
UV C
Has longer wavelength, nearer to visible light, 290 nm to 400 nm
NEAR UVR
deeper penetration, shorter wavelength, farther from visible light, 180 nm to 290 nm
FAR
Longest wavelength, 320-400 nm. Large part of the light delivered in tanning parlors
UV A
Lies in the middle of the UV spectrum, 290-320 nm, sunburn premature aging
UV B
Shortest wavelength, 180 to 290 nm, strong germicidal effects, least amount of pigment change and skin damage
UV C
In biologic tissues, uv rays are absorbed within?
2 mm of the surgace
The UV rays absorbed by the tissue are capable of? Form? Produce?
Breaking chemical bonds
New chem bonds
Photochemical effects
What are the general effects of UVR?
Formation of Vitamin D
Esophylatic effect
Variation in response to UV rays
Natural protection against UV rays
What are the therapeutic effects of UVR?
Erythema, Pigmentation, Desquamation, Growth of Epithelial Cells, Antibiotic Effects
What are the physiological effects of UVR.
Erythema, pigmentation, destruction of bacteria, wound healing, thickening of the epidermis, exfoliation of epidermal cells
Will heat to temperature varying from 60 degrees Celsius to several 100 degrees Celsius
Quartz Burner
Has a wavelength of 253 nm/ 184 nm. For treatment of acne and psoriasis
Air-cooled lamp-hanovia alpine sun lamp
For pressure areas or ulcers
Birtcher
366 nm wavelength, for pressure areas and ulcers, with attachment of appropriate applicator
Water-cooled lamp-kromayer lamo
Has a wavelength of 290 to 350 nm, for psoriasis affecting large body parts
Fluorescent tubes- theraktin lamp
Time required for mild reddening of the skin, appears within 6-8 hours, visible after 24 hrs
Minimal Erythemal Dose
Differentiate first degree erythema to second degree erythema
1DE
Appear 6-8 hrs, disappear 24 hrs
2DE
Appear 4-6 hrs, disappear 48 hrs, mild sunburn, pigmentation desquamation
Differentiate third degree erythema to fourth degree erythema
3DE
appear within 2-4 hrs, last 72-96 hrs, severe sunburn like, peeling in sheets or flakes, pigmentation and desquamation
4DE
2-4 hours, last for a week; blister formation
