Bio Research

Quadra TENS™ Bio-Metric Instrument

QuadraTENS is a safe, simple, low-cost and effective alternative to narcotic drugs for managing orofacial pain. Quadra TENS is a compact, Ultra-Low Frequency, Transcutaneous Electrical Neural Stimulator (ULF-TENS). This ULF-TENS delivers a precisely regulated, rhythmic stimulus to both masticatory and facial muscles. A single pair of electrodes provides gentle stimulation, mediated* through the fifth (Vth) and seventh (VIIth) cranial nerves, so that the benefits are received by the entire masticatory and facial musculature. When compared to 3-electrode units that require a ground on the back of the neck, the BioTENS is rated “much more comfortable” by patients. Clinicians appreciate BioTENS for its “precise control of left right balance.” An optional electrode placement, on the posterior triangle of the neck, bilaterally, provides stimulation of the eleventh (XIth-accessory) cranial nerve, which contains the motor fibers to the trapezius and sternocleidomastoid muscles. Of course, many other electrode sites can also be used. Unlike drugs, QuadraTENS stimulation has no side effects (nausea, tiredness, etc.). In the past sixteen years, many clinicians and patients have found Quadra TENS to be remarkably helpful in managing facial, head and neck pains.

An optional pair of electrodes placed bilaterally on the posterior triangle of the neck allows for stimulation of the eleventh (XIth accessory) cranial nerve, which contains the motor fibers to the trapezius and the sternocleidomastoid muscles. Alternatively, the electrode pair may be placed directly over the motor point of the trapezius or at any other site.

However, the QuadraTENS also provides a “burst” mode that produces an increased contraction without the additional “shock” inherent in the single high amplitude spike that is required to produce the equivalent degree of muscle contraction. The burst mode has been optimized to increase the effectiveness of ULF-TENS, especially when applied to larger muscles such as the trapezius.

Performance Specifications

Pulse Shape : Biphasic, variable symmetry with zero net DC component
Output : Constant current. Output parameters stable over battery range
Amplitude Range : 0.7mA to 80mA (peak to peak)
Pulse Width Range : 300 to 900 microseconds
Frequency Range : 60 pulses/minute. Very low frequency
Balance Range : 1:3 to 3:1
Channel Delay : 28 millisecond delay between channels to guarantee Zero Crossover between channels
External Indicators : Green LED = normal mode (output on) Yellow
  LED flashing = stand-by (output off)
  Red = Burst on (8 pulses at 800 Hz)
Controls : Balance control equalizes the right and left muscle responses.
Amplitude dial with 1 to 9 range is used to set intensity
Power Source : A standard, disposable 9 volt battery. Long battery life : 100 hours of typical
use with alkaline battery type. Rechargeable can be used with external charger.