Intradiscal Electrothermal Therapy (IDET) is a relatively new procedure, developed over the last few years. It is designed to treat one of several conditions that affect the inter-vertebral discs, namely:

During the procedure, an electrothermal catheter (or heating wire) is inserted into the painful disc region; the tip of the wire is then heated to 90°C for up to 15 minutes. The resulting heat causes the outer wall of the disc to thicken and contract, thereby promoting the closure of small tears in the wall. The heat also burns the nerve endings around the tip of the wire, making them less sensitive.