Almost all of the electrotherapy machines in America and around the world are 110 Volts DC and approximately 60-100 milliamps. Our nerves are VERY sensitive to the amperage and do not tolerate over stimulation. The equipment we use is actually 440 volts AC but a maximum of 2 milliamps. Low amperage and high voltage allow us to stimulate the muscles while being safe for the nerves. This combination brings blood to oxygen starved regions. This therapy is painless and can bring welcomed relief to many patients. This equipment was originally designed to treat diabetic ulcers and has saved numerous patients from amputation. It's remarkable in the treatment of peripheral neuropathy.
The most important thing that gets results when it comes to electrical stimulation therapy is muscle contractions. Usually, the deeper the contractions, the better the results as long as the treatment lasts long enough. Thiry to forty-five minutes of targeted exercise gets a better result than five minutes of targeting one muscle. The deepest possible muscle contractions must be tolerated for extended treatment times to realize optimal outcomes. Deep Contractions, time, and repetition targeted correctly equal optimal results. Nikola Tesla beat Edison in the great electrical transmission war by using AC vs Edison’s DC to solve the Resistance of Distance issue also experienced within the human body. Patients can tolerate deeper contractions longer when the electrical signal going through their soft tissue is AC instead of DC. Only AC allows for super deep contractions to be tolerated for a sufficient amount of time to get the best long-term results. The lower the average Maximum Amperage Per Second (MAPS) and the higher the voltage delivered to the muscle cells, the deeper the contractions patients can tolerate, but only when delivered via True AC Output.
Only the combination of high voltage output via AC at the lowest possible MAPS has been shown to be tolerable enough for a sufficient amount of time to allow for the saturation of better-conducting edema and active muscle fibers. Only then can the excess electricity, like too much water in a sponge, overflow into atrophied muscle fibers which works them to fatigue and forces the body to call for a new muscle fiber to be built.
NOTE: This process is not possible with a DC based stim unit in excessive edema or atrophic conditions.