Patent ID: 9320902
Filing Date: 2016-04-26
CPC Classification: A61N

Claim Text:
1. A method for the treatment of chronic pain syndromes using electrical stimulation of the spinal cord, the method comprising: positioning a first pair of implantable electrodes to a dura matter in an epidural space proximate to a subject's spinal cord at predetermined locations; positioning a second pair of implantable electrodes to the dura matter in the epidural space proximate to the subject's spinal cord at predetermined locations; and transmitting signals of first and second frequencies through the first and second pairs of implantable electrodes respectively, so that the signals of the first and second frequencies interfere with each other to produce at least one beat signal proximate to the subject's spinal cord using a current with a base medium frequency of at least 500 Hz but no more than 20 KHz, and wherein a majority of the at least one beat signal is directionally distributed and controlled, enabling the at least one beat signal to avoid remaining in and shunting through cerebrospinal fluid proximate to the subject's spinal cord, thereby recruiting dorsal column fibers.