If the treatment is working, the skin resistance will change. The therapist can access this information at any time during treatment. These are point-search and stimulation instruments. They are hand apparatus which have a probe on the tip. The emitted electrical charge is very weak and has little or no effect.
Electricity is emitted over the same probe as is used for point searching.
Most of these instruments were not built for professional use in the practice of acupuncture. They were originally produced for the purpose of creating direct sales with patients and are promoted as instruments for self-treatment. They can still be found in many mail order catalogues. Laser Instruments Laser therapy instruments have proved to be highly effective in the stimulation of acupuncture points. The laser is used to treat points where it is too painful to use needles or for treating children and adults afraid of needles.