After taking a closer look at the references below and some others I found, the method used is relatively straight forward. Most use an asymmetrical biphasic waveform. But not all. The asymmetrical biphasic waveform is basically a higher voltage positive pulse followed by a lower voltage negative pulse. The negative pulse is around one sixth the amplitude of the positive pulse but is six times longer in duration than the positive pulse. Therefore the magnitude of the pulse amplitude times the pulse duration of the positive and the negative pulse are both equal. My guess is that is to prevent a buildup of potentially harmful hydroxides while keeping the negative pulse below an active nerve stimulation level. The method of setting the positive pulse voltage level is to set it at a point that the user can feel the stimulation but it is below the level that would cause muscle twitching.
It appears that a triangular positive pulse is more effective than a rectangular pulse but it also appears that both will work. There is a study that provides details on designing a triangular pulse specific for nerve stimulation but it will cost a fee to view it. It may even be the source for the original rebuildermedical device ??? The study is available at: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T04-484MD70-63&_user=9167998&_coverDate=04%2F30%2F1991&_rdoc=1&_fmt=high&_orig=search&_sort=d&_docanchor=&view=c&_searchStrId=1420356163&_rerunOrigin=google&_acct=C000066754&_version=1&_urlVersion=0&_userid=9167998&md5=5bb8afa385a70283707f9a8ecea62339 A modified "triangular pulse" stimulator for C-fibers stimulation " A low-cost, battery-powered stimulator is described. This device generates asymmetric current pulse with fast rising phase and slower exponential decay. The current intensity and the time constant of the exponential decay can be independently and continuously varied. An example of using this stimulator to selectively activate C-fibers is demonstrated. In this case the total charge injected in one stimulation is only 67 nanocolumb, which is much smaller than that injected by conventional DC polarization technique. Detailed information about the circuit design is described." Pulse with is somewhat variable but rebuildermedical uses 240 us positive pulse followed by a 1,458 us negative pulse. Others us pulse widths up into the tens of milliseconds, so there is a lot of possible variability. It is the same with repetition frequency, Again, rebuildermedical uses 7.8 Hz but it does not appear to be critical. It is actually a fairly simple device. But it also appears to be effective for many. - Steve N -----Original Message----- From: Norton, Steve Sent: Tuesday, August 03, 2010 1:56 PM To: [email protected] Subject: CS>Fw: Re: [germkiller] Neuropathy question {Note: References below have been corrected} Here is the patent that rebuildermedical refers to on his site ; http://www.freepatentsonline.com/20050234525.pdf. As mentioned on his site, the patent does not provide specific details of the waveform used but there are other manufacturers using the same waveform. The waveform detail is shown on chart 11 of the presentation at: http://www.calmarett.com/media/pdf/Marieno_Boston.pdf. It is for a system built by Calmare Pain Therapy Treatment (Calmare) at http://www.calmarett.com/. Another related patent is http://www.freepatentsonline.com/20090326607.pdf. Again by a different inventor but strikingly similar in concept. The pulse shape is very similar to that you'd get by putting a pulse through an audio transformer. And it turns out that there is a study for that too: http://www.ncbi.nlm.nih.gov/pubmed/10198531. I don't think it would be too difficult to design a circuit to get the waveform. I do notice some differences between the Calmere and rebuildermedical units. The Calmere unit only uses 5.5 ma of current for their stimulator (chart 21 in the presentation above) while rebuildermedical appears to use voltage levels that would generate higher currents. Of course I could be wrong. I haven't had time to really absorb it all. - Steve From: Renee [mailto:[email protected]] Sent: Tuesday, August 03, 2010 6:47 AM To: [email protected] Subject: EXTERNAL:CS>Fw: Re: [germkiller] Neuropathy question {Private} Here is the message I got from a guy on another list. He said how much the device had helped him and I had asked about building one--this was his reply. I put a link first to the machine, then the last link is to the frequency part that I was going to try to duplicate. But his message is so convincing that it would be worth just getting. Samala, Renee -- The Silver List is a moderated forum for discussing Colloidal Silver. Rules and Instructions: http://www.silverlist.org Unsubscribe: <mailto:[email protected]?subject=unsubscribe> Archives: http://www.mail-archive.com/[email protected]/maillist.html Off-Topic discussions: <mailto:[email protected]> List Owner: Mike Devour <mailto:[email protected]>
