A four-lead TENS unit.


Transcutaneous electrical nerve stimulation (TENS or TeNS) is the popularized name for electrical stimulation produced by a portable stimulator and used to treat pain. TENS by definition covers the complete range of transcutaneously applied currents used for nerve excitation although the term is often used with a more restrictive intent, namely to describe the kind of pulses produced by portable stimulators used to treat pain.[1] The unit is usually connected to the skin using two or more electrodes. A typical battery-operated TENS unit is able to modulate pulse width, frequency and intensity. Generally TENS is applied at high frequency (>50 Hz) with an intensity below motor contraction (sensory intensity) or low frequency (<10 Hz) with an intensity that produces motor contraction.

TENS is a non-invasive, safe nerve stimulation intended to reduce pain, both acute and chronic. While controversy exists as to its effectiveness in the treatment of chronic pain, a number of systematic reviews or meta-analyses have confirmed its effectiveness for postoperative pain, osteoarthritis, and chronic musculoskeletal pain.


SEIN Promed Specialties


SE-30 SON-TENS - Promed Specialties ProM-200 Dual - Promed Specialties

Second Source Parts[]

Second Source Service[]


thumb|300px|right|Transcutaneous electrical nerve stimulation (TENS) Unit