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 small joints connect the vertebrae and can become a source of pain due to:
- Facet joint arthritis
- Degenerative disc disease
- Facet joint syndrome
- Lower back injuries
The purpose of this procedure is to temporarily block the pain signals transmitted by the medial branch nerves, which supply the facet joints. If the block successfully relieves your pain, it helps confirm that the facet joints are the source of the pain, and further treatment options can be discussed.
How Does It Help?
- Diagnostic: By injecting a local anesthetic near the medial branch nerves, your doctor can determine if your lower back pain is coming from the facet joints.
- Therapeutic: It can also provide temporary pain relief and help you regain mobility.
Steps of Administering a Lumbar Medial Branch Block
- Preparation:
- You will lie face down on a table, and the area around your lower back will be cleaned and sterilized.
- A local anesthetic will be used to numb the skin and underlying tissue.
- Fluoroscopic Guidance:
- Using fluoroscopy (X-ray guidance), your doctor will carefully insert a small needle to the targeted medial branch nerves near the lumbar facet joints.
- Injection:
- Once the needle is in place, a small amount of local anesthetic, sometimes mixed with a steroid, is injected near the medial branch nerves to block pain signals.
- Monitoring:
- You’ll be monitored for 15-30 minutes after the procedure to evaluate your immediate pain relief and ensure no adverse reactions.
When Can You Go Home?
- Most patients can go home within 30-60 minutes after the procedure.
- You should have someone drive you home, as the anesthetic may cause temporary numbness or weakness in your legs.
- You can resume light activities the next day, but avoid strenuous activities for 24 hours.
How Many Blocks Are Needed?
Typically, 1 to 3 injections are performed over a period of weeks, depending on your response to the first injection. The first block is often used to confirm the facet joints as the pain source.
- Initial Relief: The effects may be temporary, lasting hours to days, but it helps your physician confirm the diagnosis.
- Further Treatment: If the block relieves your pain, you may be a candidate for a longer-lasting treatment such as radiofrequency ablation, which can provide relief for months or longer.
Final Thoughts
A lumbar medial branch block is an important step in diagnosing and managing lower back pain caused by the facet joints. While it offers temporary relief, it provides critical information that guides your long-term treatment plan.
If you have any further questions or concerns, please contact our office.