| 摘要 |
Electro-therapy apparatus delivers modulated or mixed electromagnetic signal to a patient via electrodes A, B of substantially different sizes, so that the small electrode B provides a targeted and specific therapeutic effect. Typically the effect may be of pain relief. Two high frequency signals f1 and f2 may be mixed to deliver a signal having a beat frequency (f2 - f1) of 1 to 250 Hz, and the area of the electrode B at the treatment site may be over 50 times smaller than the other electrode A. The signal may be switched between a plurality of electrodes (B1 to B4). <IMAGE> |
