Understanding the Sympathetic Nervous System
The sympathetic nervous system is part of the autonomic nervous system. It helps regulate functions that happen automatically, including blood vessel activity, sweating, and other body responses.
A network of sympathetic nerves is located near the lumbar spine.
In certain pain conditions, sympathetic nerve activity may contribute to persistent or difficult-to-treat symptoms.
What Is a Lumbar Sympathetic Block?
A lumbar sympathetic nerve block is a minimally invasive procedure in which medication is injected near sympathetic nerves in the lower back.
The purpose is to temporarily interrupt nerve activity and determine whether sympathetic nerves are contributing to a patient’s pain.
The procedure may have both therapeutic and diagnostic purposes.
What Symptoms May Be Associated With Sympathetically Mediated Pain?
Depending on the underlying condition, patients may experience:
- Burning pain
- Sensitivity to touch
- Changes in skin temperature
- Changes in sweating
- Persistent pain affecting an extremity
- Pain that seems disproportionate to the original injury
These symptoms can occur for many different reasons, so careful evaluation is necessary.
Why Might a Physician Recommend a Lumbar Sympathetic Block?
A physician may consider the procedure when a patient’s symptoms suggest that sympathetic nerves may be contributing to their pain.
A nerve block can provide information about how much the sympathetic nervous system is involved.
How Is the Procedure Performed?
Image guidance helps the physician accurately position the needle.
The skin is prepared and numbed, and the needle is carefully advanced toward the targeted area.
Medication is then delivered near the sympathetic nerves.
What Can Patients Expect?
Your physician will explain how to prepare for the procedure and what to expect afterward.
Because every patient’s condition is different, the response to treatment can vary.
Some patients may experience temporary changes in sensation or other effects related to the medication.
Is It Right for Everyone?
No.
A lumbar sympathetic block is a specialized treatment intended for selected conditions. A physician must evaluate your symptoms and medical history before determining whether it is appropriate.