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Modality Test material
Terms in this set (20)
Temperature for hydrocollator
Temperature for paraffin bath
Temperature for Fluidotherapy
Temperature for Immersion Therapy
Warm 100-111, Cool - 50-64
Temperature for Test Tubes
Warm: 33-35C, Cold 10-13C
An intensity at 0.1 - 0.5 w/cm is classified as...
An intensity at 0.5-1.0 w/cm is classified as...
Medium (mild thermal)
An intensity at 1.0-2.0 w/cm is classified as...
High (vigorous thermal)
What is the different between pulse duration vs pulse period?
Duration is time that energy is flowing (on time) and period is the combined time of energy flow + lack of flow (on + off)
What is the formula for the thermal setting?
US time = desired temp increase/rate of heating (rate of heating corresponds with intensity)
What is the formula for athermal US duration?
1 minute x (number of times the treatment head fits over the lesion) X (pulse ratio) (pulse ratio value is usually 2 or 5 depending on duty cycle chosen)
When is the application of athermal US appropriate?
Acute injury, edema, tissue healing
When is the application of mild thermal US appropriate?
Sub acute injury, hematoma
When is the application of moderate thermal US appropriate?
Chronic inflammation, pain, trigger points
When is the application of vigorous thermal US appropriate?
What is the heating rate of US in muscle?
1 MHz= 0.2 degrees celsius/min
3 MHz= 0.6 degrees celsius/min
What variables should you consider when deciding the duration of sonification?
-Size of the area to be treated
-Size of the transducer
-Desired temperature increase
-Tissue interfaces involved in the area
-Transmissivity of coupling media
What heats faster, tendon or muscle?
What tissues have high vs low impedence (reflects US waves)?
Low impedence- muscle, fat, water
High impedence = bone
What is attenuation?
Loss of energy from the US beam into the tissues; 60-80% of energy is lost by absorption from non-target tissues
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