Enraf Nonius Endomed 482, Руководство по эксплуатации

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A variation to the standard biphasic asymmetrical pulsed current is the alternating one, in which the
successive pulse phases alternate with respect to the baseline. See fig 4.1.4.4.2 for details. This
waveform is also fully balanced.
To prevent accommodation to stimulation or to improve patient tolerance, the pulse frequency can be
varied through frequency modulation. Several frequency modulation programs are available. See fig
4.1.4.12 for details.
Parameters:
Phase Duration
, expressed in µs, is the elapsed time from the beginning to the end of the initial pulse
phase. See fig 4.1.4.4.1 for details.
Pulse Frequency
, expressed in Hz or pps (pulses per second), defines the repetition rate of the TENS
pulses. See fig 4.1.4.4.1 for details.
Frequency Modulation
, expressed in Hz, defines a variable frequency range that is summed to the
Pulse frequency i.e when the Pulse frequency is set to 80 Hz and the Frequency modulation is set to 40
Hz, the final frequency will vary from 80 – 120 Hz.
Modulation Program,
defines the time and sequence in which the frequency will sweep through the
Frequency modulation range. See for the available Modulation programs 4.1.4.12.
4.1.3.2.2 Burst Asymmetrical and Burst Alternating Asymmetrical
The burst biphasic and burst biphasic alternating asymmetrical pulsed currents are variations to their non
burst counterparts, in which the continuous train of pulses is interrupted by pulse pauses. See fig
4.1.4.4.3 and fig 4.1.4.4.4 for details. A burst frequency can be set for treating chronic pains, where the
use of continuous stimulation with a low pulse frequency would be too painful. Each burst lasts for 100ms
and the burst rate can be adjusted separately. With this milder TENS waveform it is easier to exceed the
motorial threshold stimulus.
Parameters:
Phase Duration
, expressed in µs, is the elapsed time from the beginning to the end of the initial pulse
phase. See fig 4.1.4.4.3 for details.
Pulse Frequency,
expressed in Hz or pps (pulses per second), defines the repetition rate of the TENS
pulses. See fig 4.1.4.4.3 for details.
Burst Frequency
, expressed in Hz, defines the repetition rate of bursts of pulses. A burst consists of a
train of pulses. Each burst lasts for 100ms and the number of pulses in a burst depends on the selected
Pulse frequency i.e at a Pulse Frequency of 100Hz, 10 pulses are available in each burst.
See fig 4.1.4.4.4 for details.
4.1.3.2.3 Symmetrical
TENS current pulses can also be used for muscle stimulation applications. Often the symmetrical
biphasic pulsed current waveform is used. See fig 4.1.4.4.5 for a graphical representation. The specified
phase duration applies to both pulse phases, which doubles the amount of available energy with respect
to the asymmetrical pulsed current waveform. This waveform is fully balanced (no residual DC
components are present).
Parameters
:
Phase Duration
, expressed in µs, is the elapsed time from the beginning to the end of a pulse phase.
The phase duration applies to each pulse phase. See fig 4.1.4.4.5 for details.
Pulse Frequency
, expressed in Hz or pps (pulses per second), defines the repetition rate of the TENS
pulses. See fig 4.1.4.4.5 for details.
Frequency Modulation
, expressed in Hz, defines a variable frequency range that is summed to the Beat
frequency i.e when the Beat frequency is set to 80 Hz and the Frequency modulation is set to 40 Hz, the
final frequency will vary from 80 – 120 Hz.