Lumbar Epidural Steroid Injection in Houston, Texas
When a lumbar disc presses on a nerve root, the problem is not only mechanical. The disc releases inflammatory chemicals that sensitize the nerve, and much of the pain that runs down the leg comes from that inflammation rather than the compression itself. A lumbar epidural steroid injection places anti-inflammatory medication exactly where that process is happening.
What is an ESI (epidural steroid injection)?
ESI stands for epidural steroid injection. On a referral or an imaging report you may see it written as lumbar ESI, LESI, or TFESI (transforaminal ESI). They all describe the same basic procedure done in slightly different ways.
The epidural space is the sleeve surrounding the spinal cord and nerve roots. A lumbar epidural steroid injection delivers corticosteroid and local anesthetic into that space at the affected level of the lower back, under live fluoroscopic (X-ray) guidance.
It is the most commonly performed interventional pain procedure in the United States, and one of the best studied.
| Stage | What happens |
|---|---|
| Before | You're positioned, the skin is cleaned and numbed, and live imaging (fluoroscopy or ultrasound) guides the needle |
| During | The medication is placed precisely at the epidural space in your lower back; most people feel pressure more than sharp pain |
| After | You rest briefly and go home the same day — arrange a driver if you received sedation |
When It Is Used
- Lumbar radiculopathy and sciatica from a herniated or bulging disc
- Spinal stenosis with leg pain and neurogenic claudication
- Degenerative disc disease with radiating symptoms
- Post-surgical radicular pain where a nerve root remains irritated
It is most effective for pain that radiates into the leg. It is less effective for pain confined to the back alone.
Approaches
Interlaminar — the needle enters the midline of the epidural space and medication spreads across several levels. Useful when symptoms are bilateral or the level is uncertain.
Transforaminal — the needle is directed to the specific opening through which the nerve root exits, depositing medication directly onto the inflamed root. More targeted, and doubles as a diagnostic test of which level is responsible.
Caudal — entry through the sacral hiatus at the base of the spine, useful after prior surgery when the anatomy above is scarred.
Your physician selects the approach based on your imaging, your symptom pattern, and your surgical history.
Does an ESI hurt, and how long does it last?
Most people describe the injection as pressure with a brief sting from the numbing medicine. The procedure takes 15 to 20 minutes, and you go home the same day.
The numbing medicine can ease pain within hours, then wear off. The steroid starts working over the next 3 to 14 days. A day or two of extra soreness in between is common.
Relief usually lasts weeks to months. Some people need only one injection, especially when a herniated disc is healing on its own. Others need a repeat injection, usually spaced at least a few months apart and limited to three or four a year.
If you have diabetes, expect higher blood sugar readings for a few days afterward and check more often.
Relief from Radiating Leg Pain at Remix Medical
An epidural injection is not a cure for a herniated disc. What it does is reduce inflammation enough that the disc has time to resorb and you have room to rehabilitate. Most patients who respond do so within one to two weeks.