Interferential And Premodulated Modality Information - Dynatronics dynatron solaris 709 plus Service Manual

InTerferenTIal and PreModulaTed ModalITy InforMaTIon

Interferential and Premodulated
Modality Information
Interferential (Quadpolar) Therapy
Interferential therapy uses four electrodes to deliver two currents, one current with a constant frequency of 4000 Hz and the
other current with a variable frequency of 4000 to 4150 Hz. The paths of these two currents cross resulting in a "beat" that
produces the therapeutic frequency at the treatment site.
The resulting frequency is between 1 and 150 Hz. An example of wave forms representing these currents is illustrated here.
In the Interferential mode, two output jacks (Channels 1 and 2, or 3 and 4) are utilized with four electrodes placed in a
crisscross fashion, "bracketing" the treatment site. The output from Channel 1 (or Channel 3) is the constant 4000 Hz wave,
while the output of Channel 2 (or Channel 4) is the variable 4000 to 4150 sine wave.
The "beat" phenomenon. Two waves of different frequencies over 4000
Hz, combine to produce a beat which is between 1 and 150 Hz.
Stimulation produced by 4 electrodes.
DYNATRON SOLARIS PLUS SERIES | SERVICE MANUAL REV. 6 | AUGUST 29, 2017 31
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