Yes it has been discussed and I have actually read them all. However the answers have not really been satisfactory. I can understand that Tens units may not be good as zappers since I have not yet found a Tens unit that provides 100% positive offset and with a HZ of 30kHz on the other hand some claim that 15Hz should be used. Most Tens are adjustable between 1-150Hz.
But I see no reason why it cannot be used as a blood purifier. The wafeform is often a asymmetrical Bi-Phasic Square, and you can adjust frequency to 4Hz or whatever inbetween 1-150Hz. Furthermore you can choose amplitude from 0-100 milliampere, which means that you can set 3-6milliampere as Beck directed in order to get the 50-100 microampere in the blood. Many sk beck devices does not provide 3-6milliampere, and are more expensive than the Tens unit. Thus, why cannot this be used as a bloodpurifier? Just put the electrodes of right size over the right arteries. What would be the difference between this and so called "genuine" "blood electrifiers"?