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Thermal agents


what is specific heat the amount of energy required to raise the temperature of a given weight of a material by a given number of degrees.
fluidotherapy temp 126-134 F
whirlpool temp 100-110 F
conduction energy exchange by direct collision between two molecules of two different temperatures. (example given, hot pack)
how long will heating occur until temperature and speed of the molecules becomes equal
which way is heat transferred from hot to cold
True or False: conduction requires direct contact or heat/cold is transferred to the air instead of the patient True
True or false: the greater the difference in temperature between two materials the slower the transfer False
Which has the highest thermal conductivity, metal, water or air? metal
conduction is better for superficial or deep heat superficial
convection heat transfer by direct contact through a circulating medium (example given: whirlpool, fluidotherapy)
conversion converts a non-thermal form of energy into heat (example given: US, diathermy)
radiation a direct form of energy transfer without the need of a medium or contact (example given: IR lamps)
evaporation energy is absorbed to change a liquid into a gas or vapor
cryotherapy the therapeutic use of cold
Effects of cold initial decrease in blood flow, decreased nerve conduction velocity, increased pain threshold, altered muscle strength , decreased spasticity, decreased metabolic rate
what is cold induced vasodilation and how would you avoid it? when cold is applied for a longer time or when tissue temperature reaches 50F or less, vasodilation MAY occur. Limit cold tx to 15 minutes or less
how long does it take nerve conduction to return to normal after cold tx? within 15 minutes in individuals with normal circulation
where can a reversible nerve conduction block occur? over superficial nerves (examples: peroneal nerve at fibular head; ulnar nerve at posterior/medial elbow
indications for cryotherapy inflammation, edema, pain, spasticity, MS, cryostretch
Created by: bsa8581