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What is often used with infrared?
What type of heat is IR?
What do we use UV for?
- chemical effects, not heat
- dermatological problems
What type of heat is electricity (diathermy)?
IR produces what?
light and heat
How do luminous bodies emit light?
on their own
How do non-luminous bodies emit light?
reflecting light of a luminous body that falls on their surface
What is the grotthus-draper law?
only energy that is absorbed is effective in producing changes in the body
What is the inverse square law?
the intensity of energy on a surface is inversely proportional to the square of its distance from the surface
- if there is more distance between machine and body the intensity is less
- visa versa
What is the cosine law?
the greatest intensity of radition is achieved when the source of light is perpendicular to the area being treated (right angle)
What type of skin absorbed infrared better?
What type of infrared do we use today?
Luminous IR is used with what?
- variety of reflectors
- incandescent bulbs (red, amber, white)
What are the advantages?
- luminous feels less intense and penetrates deeper
- deliver superficial heat without weight of HP
- dry heat-can use with open wounds
- easier to control intensity than with paraffin
- use a lot less linen then HP
- observe body part during tx very easily
- no waiting time between pts
What are some disadvantages?
- doesnt work on gate theory
- depth of penetration very poor-very superficial
- pt cant move during tx
- glare from light-must use goggles, can damage eyes
- insurance companies dont want to reimburse for it anymore
What are some physiological effects?
- stimulation of local circulation
- stimulation of local nerve endings
- possible permanent pigmentation
- wheal formation, local edema, blistering
- increased pulse, resp., and decreased BP
- increased kidney elimination
What are some indications?
- subacute and chronic conditions
- wounds-more for wet wounds (dry them out)
- use prior to estim
- get tissues to relax-prior to massage or exercise
What are some contraindications?
- very young/old-thermoregulatory system
- severe PVD (typically LEs, very poor circulation, little feeling)
- acute conditions
- anything that has caused a sensory loss (new scars, burns)
What are some precautions?
- protect eyes
- tx time 10-30 mins
- distance of bulb from skin
If the machine has a bulb of 1000watts how far from skin should it be?
If bulb has 500-600watts how far from skin should it be?