Utilizes theory that non-noxious stimuli can reduce noxious pain perception.
Introduction of an electric current near the source of chronic pain impulses or along pain pathways.
Reversible, cost effective and non-pharmacologic.
These generators can vary the intensity, electrical field and the time of delivery of stimulation.
Prior to permanent placement of the device a stimulator trial is done: percutaneous placement of leads into the epidural space or close to pain generating nerves and if a 50% improvement in pain and function occur permanent placement of the stimulator can be achieved.