Lumbar Medial Branch Block - Targeting Pain at the Source

Lumbar Medial Branch Blocks

A Lumbar Medial Branch Block (MBB) is a minimally invasive procedure used to diagnose and treat pain originating from the facet joints in the lower back. These facet joints are small, paired joints located on each side of the vertebrae and can be a common source of chronic back pain, especially in conditions like arthritis or after spinal injury.

How Does It Work?

The procedure involves injecting a small amount of anesthetic near the medial branch nerves, which supply the facet joints in the lumbar spine. These nerves transmit pain signals from the facet joints to the brain. By temporarily blocking these signals, we can determine if the facet joints are the source of your pain. If you experience significant pain relief following the injection, it suggests that the facet joints are likely causing your discomfort.

Who is a Candidate?

Patients with persistent lower back pain, particularly pain that worsens with movement, twisting, or bending, may benefit from a lumbar medial branch block. This procedure is often performed after conservative treatments, such as physical therapy and medications, have failed to provide sufficient relief. It can also serve as a precursor to a more long-lasting treatment known as radiofrequency ablation (RFA).

What to Expect During the Procedure

The procedure is typically performed in an outpatient setting and takes only a few minutes:

• You will lie on your stomach, and the skin around the injection site will be cleansed.

• A local anesthetic will numb the area to minimize discomfort.

• Using X-ray guidance (fluoroscopy), a fine needle is inserted near the medial branch nerves.

• A small amount of anesthetic is injected to block the nerves temporarily.

What Happens After the Procedure?

You may experience immediate relief from your back pain following the injection, which typically lasts for a few hours as the anesthetic wears off. If your pain is significantly reduced, it confirms that the facet joints are the source of your pain. This information helps us plan for long-term treatment options, such as radiofrequency ablation, which can provide longer-lasting pain relief.

Risks and Side Effects

Lumbar medial branch blocks are generally safe, but like any medical procedure, they carry some risks. These may include:

• Temporary soreness at the injection site

• Mild bleeding or bruising

• Allergic reactions to the anesthetic

• In rare cases, infection

At Tennessee Pain Associates, we carefully evaluate each patient to ensure that lumbar medial branch blocks are appropriate for their condition. Our goal is to provide you with accurate diagnoses and effective pain relief so you can return to your daily activities with less discomfort.