Guest guest Posted August 15, 2004 Report Share Posted August 15, 2004 On 15/08/2004, at 1:50 PM, wrote: > I don't think it's the shape of the wave but that if each pulse grows > in strenth then an > electoysis effect takes place. As I understand it, this is what > Pantheon claims not to do > over cheaper machines. > doug > > Pantheon claims to have a shorter pulse width; not pulse strength as you mention as a problem above. The " possible " problem of electrolysis they mention is only a concern when using symmetrical biphasic waves (equal +ve and -ve waveform for DC =0) at very low frequencies of stimulation for extended periods. If there is a long " duty cycle " approaching 50% for each of the positive and negative section of such a generated wave it will damage tissue via electroylis. This damage however is desired for some treatments anyway because it produces a relatively long-term stimulus in the tissues/acupoint. You will find that most modern EA machines have a short/restricted pulse width; despite the claims of one company over another. As the frequency increases, the pulse width shortens in compenstation; however as the frequency is lowered the pulse width will NOT stretch to approach a 50% duty cycle. Electrolysis WAS more of a problem when machines produces asymmetrical biphasic waves, which give an overall DC current during stimulation.......this is no longer common unless needed in certain modalities such as ryodoraku. Ryodoraku uses a DC current for very short periods, not in-situ extended stimulation that is the more standard practice in TCM. One thing to say for Pantheon is that they may use higher quality components and quality assurance than some Chinese models, but the Chinese models are very safe now too and offer more parameters for stimulation. I hope this is of use, Best Wishes, Dr. Steven J Slater Practitioner and Acupuncturist Mobile: 0418 343 545 chinese_medicine Quote Link to comment Share on other sites More sharing options...
Guest guest Posted August 15, 2004 Report Share Posted August 15, 2004 electoysis >>>>This will not occur with any of the stims because they are biphasic. At the same time the phasic effects can be very useful when used correctly. I use DC and/or monophasic stim every day. What the artical is talking about is the use of square wave. Because the square wave has a period of a DC like stim if it lasts long enough you can get a phasic effects (which again can be very helpful when you know how to use them). The phasic effects on the needles is not important because we use disposable needles. Alon Quote Link to comment Share on other sites More sharing options...
Guest guest Posted August 15, 2004 Report Share Posted August 15, 2004 The " possible " problem of electrolysis they mention is only a concern when using symmetrical biphasic waves (equal +ve and -ve waveform for DC =0) at very low frequencies of stimulation for extended periods. >>>Not biphasic but monophasic. As soon as you use biphasic you cancel such effects Alon Quote Link to comment Share on other sites More sharing options...
Guest guest Posted August 15, 2004 Report Share Posted August 15, 2004 Electrolysis WAS more of a problem when machines produces asymmetrical biphasic waves, which give an overall DC current during stimulation....... >>>Again the term biphasic means it is not DC and has no DC like effects. Again also, only with DC stimulation you can get the phasic effects at the two electrodes which are often very important therapeutically. Alon Quote Link to comment Share on other sites More sharing options...
Guest guest Posted August 15, 2004 Report Share Posted August 15, 2004 Sorry Alon; you are mistaken here. Perfectly SYMMETRICAL biphasic waves have no net DC current and therefore avoid electrolysis. However, most older machines and some of the cheaper ones still made produce ASYMMETRICAL biphasic waves which result in an overall net DC charge and electrolysis. That is....they produced a greater -ve phase of the wave than is produced in the positive phase. On 16/08/2004, at 1:57 AM, Alon Marcus wrote: > The " possible " problem of electrolysis > they mention is only a concern when using symmetrical biphasic waves > (equal +ve and -ve waveform for DC =0) at very low frequencies of > stimulation for extended periods. > > >>>Not biphasic but monophasic. As soon as you use biphasic you > cancel such effects > Alon Electrolysis WAS more of a problem when machines produces asymmetrical biphasic waves, which give an overall DC current during stimulation....... >>>Again the term biphasic means it is not DC and has no DC like effects. Again also, only with DC stimulation you can get the phasic effects at the two electrodes which are often very important therapeutically. Alon Again......biphasic certainly does not mean no DC. DC occurs in asymmetrical waves by definition. The current may be originally AC in nature, but if it is an " asymmetrical " wave it results in a DC current. Modern machines generally produce SYMMETRICAL biphasic waves today and therefor no DC/electrolysis. The exception of course is those that allow the production of asymmetrical bipahsic or DC for specific therapeutic purposes. Best Wishes, Dr. Steven J Slater Practitioner and Acupuncturist Mobile: 0418 343 545 chinese_medicine Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You are posting as a guest. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.