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Thoracic Medial Branch Block


For Chronic Upper & Mid Back Pain

A thoracic medial branch block is an outpatient procedure for diagnosing and treating upper and middle back pain.

What are thoracic facet joints?

Facet joints connect the vertebrae, the bones of the spine. They help guide your spine when you move. The area of the spine between your neck and low back is called the thoracic region. It contains twelve vertebrae.

Facet joints are found on both sides of the spine. Each is about the size of a thumbnail. Thoracic facet joints are named for the vertebrae they connect and the side of the spine where they are found. The right T4-5 facet joint, for example, joins the 4th and 5th thoracic vertebrae on the right side.

Medial branch nerves are found near facet joints. They transmit pain signals from the facet joints to your brain.

What is thoracic facet joint pain?

You may feel pain if a thoracic facet joint is injured. Sometimes it feels like muscle tension. Other times it can be severe pain.

The cartilage inside the joint may be injured. Other times only connecting ligaments surrounding the joint are injured.

Facet pain also depends on which facet joint is affected. Pain from thoracic facet joints occurs in a large area from your upper back and shoulder to your hips. The diagram shows areas of pain usually associated with specific joints.

How do I know if I have thoracic facet pain?

If you have pain in one or more of these areas, and it lasts longer than two months, you may have thoracic facet pain. Common tests such as x-rays or MRIs, may not always show if a facet joint is causing pain.

What is a thoracic medial branch block?

In a thoracic medial branch block, a local anesthetic (numbing medicine) is injected near the medial branch nerve. This stops the transmission of pain

signals from the facet joint. If this reduces your pain and helps you move your back like normal, it may tell the doctor which facet joint is causing the pain.

What happens during an injection?

A local anesthetic will be used to numb your skin. The doctor will then insert a small needle near the medial branch nerve. Fluoroscopy, a type of x-ray, must be used to ensure the safe and proper position of the needle. Dye will also be injected to make sure the needle is at the correct spot.

Once the doctor is sure the needle is correctly placed, the medicine will be injected.

This pamphlet is for general education only. Specific questions or concerns should always be directed to your doctor. Your doctor can explain possible risks or side effects.

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Oviedo, FL 32765

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