Effects of Heat Flashcards
Superficial Heat modalities
Hot packs Paraffin Infrared lamp Fluidotherapy Hot and moist air
Deep Heat modalities
Ultrasound
Diathermy
Heat Effects depend on
Temp gradient
Rate of change
Volume of tissue exposed
Rate of energy dispensation
Thermal conductivity
Rate of heat added must compensate for BF into area
Too slow and area will cool too fast
Too fast and tissue can’t dissipate heat and will burn
Therapeutic range of temp for tissue
40-45 C
104-113 F
The greater the area exposed…
the greater the response
Type of tissue effects
Adipose = insulator
The more adipose, the lower heat effect we would get
Superficial heat issues
Max temp inc is at a depth of 1mm - 2 cm
Max elevation of temp occurs within 9 min of application assuming a steady temp
Superficial temp issues - Depending on tissue can get a possible
Increase of temp at 2 cm depth
Joints with limited soft tissue covering
Peak intraarticular temp reached at
about 15 minutes
One peak tissue temp has been reached
it plateaus and often decreases because of VD and more blood moving away
Inc tissue temp
Inc cell metabolism
Inc O2 uptake
Inc tissue extensibility
Stimualted release of histamin, prostaglandins, bradykinin, and NO
Inc in capillary hydrostatic pressure and permeability
Goals of heat application
dec pain Dec muscle spasm Improve tissue healing by inc blood flow Control inflammation Inc tissue extensibility
Contraindications or Precautions
Look on D2L
Pregnancy
Special questions
Contraindication/Precautions
Cognition
Temp tolerance
Medication use (steroids, anticoagulants, antibiotics)
