Medial branch blocks can be used independently to provide long-term pain relief. They can also be used to precisely identify the facet joints as the cause of pain, and are the preliminary procedure prior to radiofrequency neurotomy of the medial branch nerves.
Medial branch block interrupts the sensory nerve supply to the involved facet joint through the use of a precise administration of an anesthetic agent and steroid. After a local skin anesthetic is applied, the physician uses fluoroscopy (x-ray) guidance to place a needle along the nerves that supply the inflamed joint.
The facet joints are the small joints located between each vertebra that provide the spine with both stability and flexibility. Facet syndrome occurs when one or more of these joints become inflamed or irritated.
Medial branch blocks are performed on an outpatient basis. The procedure typically requires 30 minutes, including preparation time. It is followed by 30 minutes of observed recovery time.
Medial branch blocks in one area are generally limited to three within a six month time frame. In many instances, only one or two injections are required to obtain benefit.
Medial branch blocks have been performed safely for many years with excellent outcomes. The benefit from this procedure will typically occur several minutes following the procedure.