Cold and Superficial Heat Flashcards
what is it called when air or water passes over a body part?
convection
ex: fluidotherapy and whirlpool
What is conduction?
direct contact
ex: ice pack, hot pack, emersion, paraffin.
What is radiation?
emits from surfaces w/ temperatures above 0
Define Inverse Square Law
if distance from skin is 60cm and we reduce it to 30cm = 1/2
the inverse of 1/2 = 2
2 squared is 4
this means that the heating effect is 4-fold
What law defines when a radiant is perpendicular to the skin and cosine of the angle must be found to know the amount of energy hitting the surface?
Cosine Law
Conversion is when we change a form to another form. What are two big examples of this?
Ultrasound and diathermy
Whats the difference between cryotherapy and cryokinetics?
cryotherapy= applying a cold modality
cryokinetics= applying a cold modality and exercises
How does the body’s blood flow respond to cold modalities?
Vasoconstriction and decreases metabolism of cells
how deep does superficial heat penetrate?
.5 to 1 cm