Tiny implant zaps away chronic joint pain in early trial

This early study tests a small device that sends gentle electrical pulses to nerves to relieve severe, long-lasting knee, elbow, or shoulder pain. About 30 adults with chronic pain will first try a temporary implant for up to 8 hours. If it works well, they can get a permanent version. The main goals are safety and whether the device successfully delivers stimulation to the nerve.