Infrared/Ultraviolet Flashcards
uses electromagnetic energy rather than true thermotherapy using conduction for heat transfer
infrared
when using infrared place a ____ over the tx area
moist warm towel
two types of infrared
luminous
non lumionous
most commonly used infrared
near infrared
Near infrared parameters
depth- 5-10mm
sup temp- 110 F
Deep temp- 118 F
15-20min
Far infrared parameters
depth- 0.5-2mm
Sup temp- 114F
Deep temp- 107F
15-20min
Pt position for infrared
20in from source. Lamp at 90*
Only use infrared when…
pressure from other modalities are not tolerated
infrared contraindications
- circulatory diseases
- dermatitis
- acute injury
infrared indications
- pain
- increase blood supply
- mm spasm
non heat modality that stimulates chemical changes by absorption of electromagnetic energy
ultraviolet
UV that uses hot quartz. Causes most skin erythema
UVB
UV that uses cold quartz. Germicidal
UVC
High powered lamp, close to skin at perpendicular angle =
deepest penetration
Protective reaction of the skin
pigmentation
superficial skin thickening- 72 hrs after exposure
epidermal hyperplasia
Vitamin D conversion necessary for
- Ca absorption
- Bone formation
- Organ function
UV indications
- Psoriasis (skin disorders)
- Wound healing
smallest UV dose producing erythema w/in 8 hrs of exposure but disappears w/in 24 hrs
Minimal Erythemal Dose MED
definite redness, appears w/in 6 hrs. Lasts 1-3 days. 2.5x MED
1st Degree (E1)
Electromagnetic radiation which lies between X-ray and visible light
Ultraviolet
Indications for UV (2)
- Psoriasis
- Wound healing
UV contraindications (4)
- skin cancer
- tuberculosis (pulmonary)
- fever
- cardiac, kidney, liver disease
UV precautions (3)
- photosensitivity (meds)
- recent X-rays
- previous tx have not disappeared
UV physiological effects
- erythema
- vitamin D synthesis
- vasodilation
- increased pigmentation
No change in skin redness occurs in the 24 hrs after UV exposure
Suberythermal dose SED
The smallest dose producing erythema within 8 hrs that disappears within 24 hrs
Minimal erythemal dose MED
Definite redness with some mild desquamation appears within 6 hrs after exposure and lasts 1-3 days. 2.5x MED
First degree erythema E1
Intense erythema with edema, peeling and pigmentation appears within 2 hrs after tx and is like severe sunburn. 5x MED
Second degree erythema E2
Erythema with severe blistering, peeling and exudation. 10x MED
Third degree erythema E3
UV parameters
50% MED first tx and increase 10-40% each following tx
