Radiofrequency coagulation (RF)

Radiofrequency coagulation is a method for creating long-term pain relief similar to that provided by diagnostic nerve blocks. Using high-frequency alternating current – so-called radiofrequency – the area around the needle tip is heated to approximately 85 degrees for approximately 1 minute. In this way, a nerve pathway is damaged. The nerve can therefore no longer transmit pain from the area.

All nerves that are damaged try to grow back, usually within 6–12 months. If a nerve is damaged with a scalpel, there is a high risk that it will miswire when it grows back, which can create a new and difficult-to-treat pain condition. In contrast, radiofrequency coagulation only affects the inner core of the nerve (the protein structure), while the sheath around the nerve remains intact. Therefore, the nerve can grow back properly.

After 6–12 months, the pain may sometimes return, although this is uncommon. If the pain returns, the treatment can be repeated, and this can be done several times without the risk of further side effects.

Before radiofrequency coagulation becomes relevant, repeated diagnostic tests must show that the pain clearly decreases or disappears during the time the local anesthetic is in effect.