Heat Flashcards
what are the six uses of heat
- relaxation
- pain relief
- inc blood flow
- facilitate tissue healing
- decrease muscle spasm
- decrease jt/tissue tightness
what is the level of therapeutic heat?
104-113F, less can have mild effects, more can damage tissue
how does heat affect metabolism
heat increases metabolism and oxygen available to cells
how does heat impact the nervous system?
heat DECREASES SYMPATHETIC RESPONSE leading to vasodilation
how does heat impact inflammation? (dont need to know specific mediators for test)
- heat activates PGs and Hist to vasodilate smaller arteries and arterioles
- heat activates kallikrein then bradykinin which increases vascular permeability
what is the thermal gait theory?
local thermoreceptors block input from nociceptive afferents
what is the effect of heat on connective tissue?
plastic elongation: ability of a tissue to maintain stretch after its applied
what does thermal conductivity depend on (3)
- intensity of the heat
- time of exposure
- thermal medium
how does adipose tissue behave with heat
it is an insulator that decreases heat conduction
how far does heat reach? depth
1-3cm
if you want to achieve a deeper heat what type of modality would you use
continuous US 1-5cm
what are the four main heat conduction modalities
MHP, paraffin, electric heating pads, and OTC heat wraps
what is the main heat convection modality?
fluidotherapy
what is the main radiation heat modality?
laser
what is the melting point of paraffin?
129
