Radiofrequency ablation
Radiofrequency Ablation
Interrupting pain signals from small sensory nerves —
for relief that lasts longer than an injection.
What is this procedure?
Radiofrequency ablation (RFA) uses heat generated by radiofrequency
energy at the tip of a special needle to interrupt pain signals from small
sensory nerves that carry pain from a joint — without affecting the nerves
that control muscle movement.
RFA is most commonly used on the medial branch nerves that carry pain
from the facet joints of the spine, in both the neck and the lower back.
It can also be used for pain from the sacroiliac (SI) joint, and for knee
osteoarthritis in carefully selected patients.
Who is it for?
- People with chronic back or neck pain from the facet joints
who responded well to a diagnostic medial branch block —
that is, their pain clearly improved after the test injection - People whose pain returned after a nerve block and who want
longer-lasting relief - Older adults with knee osteoarthritis who are not candidates for
surgery (considered case by case)
Why a test injection comes first
A diagnostic local-anesthetic block of the target nerve is the
standard first step. It confirms that the nerve really is the source of
your pain. A clearly positive test greatly increases the likelihood that
RFA will work well — and spares patients an unnecessary procedure when
it would not.
What happens during the procedure
- You are positioned on the X-ray table; the skin is cleaned and numbed.
- The physician guides the special needle to the target nerve under X-ray.
- The position is verified with gentle electrical stimulation,
confirming the needle tip is near the sensory nerve and away from
motor nerves. - Radiofrequency energy is delivered for the planned duration;
several sites may be treated in one session. The whole procedure takes
about 30–60 minutes. - You are observed in recovery and go home the same day.
What results to expect
- Pain usually improves clearly within 1–3 weeks
(some soreness or a temporary increase in pain during the first week is normal). - Relief typically lasts about 6–12 months,
because nerves can regrow over time. - If the pain returns, the procedure can be safely repeated.
Preparation and risks
- Preparation is the same as for injection procedures: report blood
thinners, allergies, and medical conditions, and do not drive yourself
home that day. - Always tell your physician in advance if you have a pacemaker or
any implanted electronic device. - Possible side effects: soreness at the treated site for 1–2 weeks
and temporary patches of skin numbness. Serious complications are very rare.
weakness of an arm or leg, or unusually severe pain after the procedure —
call 0-2206-2900 Ext. 10457.
Questions about this procedure?
Our physicians are happy to assess your condition and advise you.