primera
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Catalog excerpts

MOVING REHABILITATION FORWARD ™ Extensive range of programs – 8 TENS and 6 NMES Programs The HAN TENS Waveform, further differentiates PRIMERA from the rest The PRIMERA features a proven circuit with over 10 years of reliable performance Complete package includes: PRIMERA Unit, Carrying Case, Battery, Leadwires, Dura-Stick Electrodes, Back Support Belt and User’s Manual Two-year Warranty Technical Specifications Dual channel: individually isolated circuits Type: Constant Current Low Battery Indicator: If the battery goes below 6.9 volts +/- 0.2 Volts the battery symbol will flash on/off once every second Waveform: Asymmetrical, rectangular bi-phasic with zero DC current Open Electrode Detect: If an open circuit is detected at the output of channel A or B the output current will be reset at zero TENS and NMES Amplitude: 0 - 80 mA

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The HAN Waveform A Brief History of TENS 1965 - Melzak and Wall “Gate Control Theory” 1970 - First High Frequency TENS devices marketed 1979 - Cheng and Pomeranz landmark study 1979 to 1991 - no significant findings addressing the basic techniques of low and high frequency in TENS 1991 - Dr. Ji Sheng Han at the Neuroscience Research Institute, Beijing Medical University in Beijing China Extensive research into electro-acupuncture and the role of endogenous opioid peptides in pain control, found: LOW frequency stimulation accelerates the release of two opitates in the brain to manage pain...

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