9
8
directly through the area of pain or localized enervation), a quick pulse rate
(setting greater than 80Hz on the Pulse Rate Control) is desired. The patient
should not perceive individual pulses but rather have the sensation of steady
continuous stimulation.
Despite above recommendations, these individual patients may require slight
variations of the above settings, according to the nature of their condition.
TREATMENT MODE
Normal or Conventional TENS offers the practitioners complete control over all the
various treatment parameters of the instrument.
Burst Mode is analogous to the Low Rate TENS technique except the low fre-
quency individual pulses are replaced by individual
“
bursts
”
of 7-10 individual pulses.
It is thus a combination of Conventional TENS and Low Rate TENS. In Burst
Mode, the treatment frequency is fixed by the instrument and is not adjustable with
the Frequency Rate control.
Modulated Mode attempts to prevent nerve accommodation by continuously cy-
cling the treatment intensity. When using Modulated Mode increase the intensity
only when the unit is at the maximum intensity of the modulation cycle. If the
intensity is increased during a low intensity period of the cycle, the patient may turn
up the control very slowly, so that they may feel the intensity any higher.
TIME DURATION
The onset of pain relief should occur shortly after the intensity setting has been
determined. However, in some cases, pain relief may take as long as 30 minutes
to achieve. TENS units are typically operated for long periods of time, with a mini-
mum of 20
–
30 minutes and in some post-operation protocols, as long as 36
hours.
In general, pain relief will diminish within 30 minutes of the cessation of
stimulation.
II.LABEL
The label attached to the back of device
contains important message about this
device- model, serial number, supply
voltage, CE number and classification.
Please do not remove.
Chapter 9 : GRAPHIC SYMBOLS
1.
Note Operating Instructions
2.
Degree of Electrical Protection BF
3.
Do not insert the plug into AC power supply socket.
4.
Direct Current (DC power source)
Chapter 10 : PARAMETER CONTROLS
PULSE DURATION
Wider pulse duration settings will deliver stronger stimulation for any given inten-
sity setting. As mentioned in the Controls section, by using a combination of inten-
sity and pulse duration, it is felt that various pulse widths are capable of stimulating
different groups of nerve fibres.
The choice of which pulse duration to use is partially dependent upon the Treat-
ment Mode and Protocol selected (refer to the appropriate section).
PULSE RATE
The Pulse Rate (hertz or pulses per second) chosen depends greatly upon the
type of electrode placement given to the patient.
When using contiguous and dermatome electrode placements (i.e. stimulating
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