Dynatron 150plus, Service Manual

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Dynatron ® 150 plus
Treatment Instructions
10
Patient Coupling
The Dynatron 150plus provides the feature of PATIENT COUPLING SENSING
which senses the coupling between the soundhead and the patient to ensure proper
delivery of the Ultrasonic therapy (this feature is in effect during CONTINUOUS
duty cycle only and works best at 1.0 W/cm
2 or greater). Coupling (contact between
the soundhead and the treatment site) may be provided either via a coupling agent
such as a gel or lotion, or in water, as with underwater treatments. Any material used
as a coupling agent must be highly conductive of ultrasonic waves. Air is a very poor
conductor of ultrasonic waves. Therefore, avoid allowing any air between the
soundhead and the treatment area.
During the treatment the soundhead should be moved continuously covering an area
approximately twice the size of the soundhead in area. The full surface of the
soundhead should maintain contact with the patient’s skin (except with underwater
treatments). If all or part of the soundhead is not touching the patient, coupling may
not be adequate and the patient will not receive the intended dosage of the ultrasonic
wave and/or the soundhead may warm up very quickly.
Ultrasound Coupling Bar Graph
APPLIES ONLY TO VERSIONS 1.04 AND ABOVE
During an Ultrasound treatment, you can display a bar graph to indicate coupling;
that is, whether adequate contact is being maintained between the soundhead and the
patient’s skin. The bar graph uses the eight segments in the top half of the TIME
DISPLAY, with eight lighted segments indicating best conductance, and one lighted
segment indicating poorest conductance. In the illustration below, eight of the eight
segments are lighted indicating best coupling.
Coupling Bar Graph: Eight lighted segments indicate good coupling between patient and
soundhead.