In addition the simultaneous application of ultrasound with electrotherapy
minimises the accommodation phenomenon normally associated with
electrical stimulation of the peripheral nerves.
The combination of ultrasound with interferential therapy appears to give rise
to less adverse treatment effects than are associated with the combination
of ultrasound with diadynamic currents or other electrical stimulations. It has
also been suggested that a greater effective treatment depth can be
achieved with an ultrasound/interferential combination.
Unlike routine interferential therapy the intensity of the electrical stimulation
in combination therapy may need to be REDUCED during treatment,
probably due to the continued effect of the ultrasound on the nerve
membrane threshold.
In summary, by combining the two treatment modalities none of the individual
effects of the treatment are lost, but the benefit is that lower treatment
intensities can be used to achieve the same results and there are additional
benefits in terms of treatment times.
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