Because the surface of the shortwave applicator drum is 25 times larger than a typical ultrasound treatment area, it heats a much larger area. (A standard drum heating area for a diathermy unit is 200 cm2, or approximately 25 times that of ultrasound.)
Unlike ultrasound, which causes a fluctuating tissue heating rate as the transducer is moved, diathermy's applicator is stationary so the heat applied to the area is more constant.
The rate of temperature decay is slower following diathermy application. Muscle heated with pulsed shortwave diathermy will retain heat over 60% longer than identical muscle depths heated with 1 MHz ultrasound.5,51 This is important because it provides the clinician more time for stretching, friction massage, and joint mobilization before the temperature drops to an ineffective level.
Application of diathermy does not require constant monitoring by the clinician, whereas ultrasound application requires constant monitoring. Thus, a clinician can work with another patient while one is receiving diathermy treatment. This enables the clinician to be more efficient.
Because the surface of the shortwave applicator drum is 25 times larger than a typical ultrasound treatment area, it heats a much larger area. (A standard drum heating area for a diathermy unit is 200 cm2, or approximately 25 times that of ultrasound.)Unlike ultrasound, which causes a fluctuating tissue heating rate as the transducer is moved, diathermy's applicator is stationary so the heat applied to the area is more constant.The rate of temperature decay is slower following diathermy application. Muscle heated with pulsed shortwave diathermy will retain heat over 60% longer than identical muscle depths heated with 1 MHz ultrasound.5,51 This is important because it provides the clinician more time for stretching, friction massage, and joint mobilization before the temperature drops to an ineffective level.Application of diathermy does not require constant monitoring by the clinician, whereas ultrasound application requires constant monitoring. Thus, a clinician can work with another patient while one is receiving diathermy treatment. This enables the clinician to be more efficient.
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