Dynatron 150plus, Руководство по обслуживанию

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Dynatron ® 150 plus
Ultrasound Usage Cautions
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Continuous Verses Pulsed Ultrasound
Ultrasound can be delivered in one of two modes. Continuous means that the
ultrasound energy is delivered uninterrupted form the time the intensity is raised until
it is lowered again to zero. Pulsed means that some of the time during every second,
the sound energy is interrupted.
The peak intensity might be set the same for two treatments, one given continuously
and the other given in a pulsed mode.
1. Less total energy will be given in the pulsed mode.
2. Pulsed sound is often used when less thermal effect is desired.
NOTE: The same result could be accomplished by lowering the intensity in
continuous mode.
3. Pulsed sound may have applications for wound management.
Duty Cycle
Duty Cycle is when the Ultrasound energy is subjected to regular and predictable
interruption (pulsed) or no interruption (continuous). The Dynatron 125 can be set at
10%, 20%, 50% or continuous.
• Continuous is 100%
• 50% Duty Cycle means that during every second of treatment, there is as much
OFF time as ON time (usually microsecond pulses).
• 20% means there is four times as much OFF time as ON time. Every second has
20% of the time when energy is flowing and 80% when it is not.
• 10% means that for every second, 10% of the time energy is flowing and 90% of
the time, it is not.
Patient Susceptibility
Some patients’ skin is more sensitive to Ultrasound output. This can cause a reaction
similar to a heat rash.
Potential for Burns or Periosteal Pain
It is possible for a patient to suffer a burn from Ultrasound therapy if the therapy is
not administered properly. This can occur for the following reasons:
• Intensity (power) too high
• Frequency too low