4. Unit operation
PHG 700C / 701C User Manual Page 38 of 47
4.10 I/t curve
It is recommended to use the results obtained by determining I/t curve to create treatment programs that will
be executed exclusively with the PhysioGo units with electrotherapy function.
Step Description
2.
Choose the tab 1, mode
Confirm by the button or once again
press the selected field.
3.
If the unit is in manual mode, press
4.
Using the keys or by touch set the position of I/t curve. Confirm by the key or once
again press the selected field.
5.
Prepare the patient for the treatment according to indications in point 4.1. It is recommended to use
the point electrode (cathode, black plug) as an active electrode.
6.
Press (key or field). The unit is in stimulation mode.
7.
Using the keys or buttons , increase the output current for the pulse duration of
1000 ms until reaching value, at which minimum muscle contraction is observed. The current value
is automatically applied to the chart.
The pulses appear at 2 seconds intervals.
8.
Using the key or button , move one position to the right to the value under 700 ms pulse
duration.
Again set the current at such a value at which minimum muscle contraction occurs, then mark it on
the diagram (setting starts with value measured for the previous pulse width, you can reduce the
current and start your observation from zero value of the output current). Repeat the procedure for
all rectangular and triangular pulse time values.
9.
Upon completion of stimulation, press the key
or button , the unit will automatically
display:
• rheobase, chronaxie, accommodation
threshold value,
• accommodation factor value along with
commentary and visual evaluation on the
scale,
• quotient accommodation value with
commentary and visual evaluation on the
10.
Press to see again the graph. Press to save the curve. Enter the name and press
11.
Press the key to escape from the I/t curve mode.
It may happen that the muscle reaction is not observed for triangular pulses of 1000 ms and 700 ms pulse
duration. Then you should interrupt the procedure and start it again from 500 ms pulse duration. For the time
values of 1000 ms and 700 ms should be set 0 mA value. In this case, parameters are determined on the base of
signal amplitude for 400 ms and 200 ms pulse duration.
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