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4.3. Intensity
Intensity controls the strength of the single impulse. Each patient senses the intensity individually
due to tissue resistance, thickness of skin, and so on.
Therefore intensity should be set in a range, where impulses are felt as tingling and tapping, but
never as uncomfortable or even painful. Stimulation should not produce muscle contractions.
These can be useful when pain is caused by cramped or spastic muscles. Under these
circumstances TENS may be used as a common muscle stimulator to release the spasm
fast. There it is recommended to set frequency high, pulse width long and intensity to visible
EN
contraction (but still tolerable for the patient).
Usually 20 to 30 minutes of such muscle contraction releases the spasm.
Settings for intensity can be found in chapter 5.2.4.
4.4. Treatment duration
TENS devices are commonly used for longer periods of time, 20-30 minutes. For some post-
surgical treatments the duration may be prolonged to 36 hours. Pain relief may already occur at
treatment begin. In some cases it may take up to 30 minutes until pain relieve sets in, especially
when point placement of electrodes is applied or at lower frequency settings. Important is to
continue pain therapy patiently and consequently.
You may read about settings for treatment duration in chapter 5.2.5.
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