A transcutaneous electrical nerve stimulation (TENS) device provides significantly improved patient results by supplying high frequency electrical pulses at frequencies in a range of 2.5 to 60 kilohertz. The frequency and intensity of the pulses can be adjusted, to treat the patient at the optimal frequency...http://www.google.ca/patents/US5052391?utm_source=gb-gplus-sharePatent US5052391 - High frequency high intensity transcutaneous electrical nerve stimulator and method of treatment
