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High frequency or conventional TENS This is a high stimulating, low intensity form that affects fast conducting sensory nerves, resulting in immediate action while the unit is turned on, with quicker abatement of relief once the stimulation ceases. The pulse rate is set usually between 40-150 pulses per second. This produces a steady buzz or tingling sensation between the electrodes. The resulting electric signal effectively blocks the transmission of ones own pain signal along the nerves to the brain through the gating effect. Encephalins, which are natural pain killers, are also released in the brain, and these help with pain management. Patients can wear the unit all day and turn it on and off as needed.
Low frequency This method stimulates slow conducting autonomic nerve fibers. The pulse rate is set to 10 pulses per second or less. This results in visible twitching of the muscles up to the tolerance level of the patient. The patient will also experience a pulsating or tapping sensation. In this form of TENS, the body reacts by releasing endorphins which are natural pain-killers. These serve to block neural pain messages to the brain. Results with this method may take longer, but their effectiveness will usually last longer.
Pulsed (burst) In this form of TENS high frequency bursts of a low intensity stimulus are used recurrently.
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Content last modified on Mar 27, 2003
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