. >> reporter: doctor stephen rosen with the delaware valley pain and spine institute is testing the system. >> in real time, we're reading the patients pain and responding to it, and that is a major advance in pain management. >> reporter: device is surgically implanted in the back with a lead that goes up the spinal column. >> this is all, under the skin >> reporter: device creates an electrical stimulation that stops pain signal to the brain and first to adjust to movement and variations in pain. >> the signal can change, the patient's position, whether they are coughing, if they are in a car. >> reporter: brian hopes he will be able to get off a fentanyl patch and oxycodone he has been using for pain relief. >> praying that it can help, enough to get off of some of the drugs. i don't want to be on this medication for the rest of my life. >> reporter: since therapy does not work for everyone brian was able to try a portable external unit before decide to go get the surgery. >> it helps with the nerve pain. sort of the tingling feeling. >> i think it is great, awesome and i believe

. >> reporter: doctor stephen rosen with the delaware valley pain and spinal institute is testing the evoke system. >> in real time we're reading the patient's pain and responding to it, and that is a major advance in pain management. >> reporter: device is surgically implanted in the back with a lead that goes up the spinal column. >> this is all under the skin. >> reporter: device creates an electrical stimulation that interrupts pain signals to the brain and it is first that automatically adjust to movements and variations in pain. >> signal can change the pain in the patient's position whether they are coughing, if they are going to be in a car. >> reporter: brian hopes he will get off a fentanyl patch and oxycodone he has been using on pain relief. >> i'm praying it can help enough to get off some of the drugs. i dent want to be on this medication the rest of my life >> reporter: since therapy doesn't work for everyone brian was able to try a portable external unit before decide to go get the surgery. >> it helps with the nerve pain, just a tingling feeling, it is great, it is aw