Selective Nerve Root Block Injection: Advanced Non-Surgical Relief for Sciatica & Nerve Compression- By Dr. Balaraju Naidu, Robotic Orthopedic Surgeon, ONUS Robotic Hospitals
Are you suffering from back pain that travels from the lower back to the buttock, thigh, leg, or foot?
Do you experience tingling, numbness, burning sensation, or electric shock-like pain while walking or standing?
👉 These symptoms may indicate nerve root compression, commonly seen in conditions like:
- Sciatica
- Lumbar Disc Herniation
- Lumbar Canal Stenosis
- Foraminal stenosis
- L4-L5 or L5-S1 nerve compression
At ONUS Robotic Hospitals, advanced minimally invasive spine procedures like Selective Nerve Root Block (SNRB) Injection are offered for selected patients to help reduce nerve inflammation and relieve radiating leg pain.
What Is a Selective Nerve Root Block Injection?
A Selective Nerve Root Block Injection is a minimally invasive, image-guided procedure where medication is injected near a specific spinal nerve root.
The goal is to:
- Reduce inflammation around the nerve
- Decrease pain signals
- Identify the exact nerve causing symptoms
- Improve mobility and comfort
👉 It is both a diagnostic and therapeutic procedure.
Why Does Nerve Compression Cause Leg Pain?
The nerves exiting the lower spine supply sensation and strength to the legs.
When these nerves are compressed by:
- Disc bulge
- Slipped disc
- Arthritis
- Bone spurs
- Canal narrowing
…it can lead to:
- Radiating pain
- Burning sensation
- Tingling or numbness
- Weakness
- Difficulty walking
This condition is commonly called lumbar radiculopathy or sciatica.
Common Symptoms That May Need SNRB Injection
⚠️ Symptoms Include:
- Lower back pain radiating to leg
- Buttock pain
- Burning or electric shock sensation
- Tingling or numbness in leg or foot
- Pain while standing or walking
- Difficulty sitting for long periods
- Weakness in leg
👉 Pain usually follows the path of the affected nerve.
Conditions Where SNRB Injection May Help
Selective nerve root block may be useful in selected patients with:
✔ Sciatica
✔ Disc Bulge / Slipped Disc
✔ Lumbar Canal Stenosis
✔ Foraminal Stenosis
✔ Nerve Root Irritation
✔ Post-surgical nerve inflammation
How Is the Procedure Done?
Step-by-Step Overview
1. Image Guidance
The procedure is performed under:
- Fluoroscopy (live X-ray guidance)
or - CT guidance
This helps accurately target the affected nerve.
2. Needle Placement
A thin needle is carefully placed near the compressed nerve root.
3. Medication Injection
A combination of:
- Local anesthetic
- Anti-inflammatory medication (steroid)
is injected around the nerve.
4. Observation
The patient is monitored briefly and usually goes home the same day.
👉 The procedure typically takes 15–30 minutes.
Benefits of Selective Nerve Root Block Injection
✅ May Help In:
- Reducing nerve inflammation
- Relieving radiating leg pain
- Improving walking and mobility
- Reducing numbness and tingling
- Identifying the exact pain source
- Avoiding or delaying surgery in selected patients
👉 It is a minimally invasive alternative for carefully selected cases.
Is the Procedure Painful?
Most patients tolerate the procedure well.
You may feel:
- Mild pressure
- Temporary discomfort during injection
But severe pain is uncommon.
How Long Does Relief Last?
Relief varies depending on:
- Severity of compression
- Underlying condition
- Response to treatment
Some patients experience:
- Relief for weeks to months
- Better participation in physiotherapy
- Reduced need for pain medications
👉 In some cases, repeat injections may be advised.
Who Is a Good Candidate?
SNRB may be considered for patients who:
- Have radiating leg pain
- Did not improve with medications or physiotherapy
- Want to avoid surgery initially
- Need confirmation of pain-causing nerve
When Is Surgery Needed?
Surgery may still be necessary if there is:
- Progressive weakness
- Severe nerve compression
- Loss of bladder/bowel control
- Persistent severe pain despite treatment
👉 Early evaluation helps decide the best treatment approach.
Recovery After SNRB Injection
Most patients can:
- Walk shortly after procedure
- Return home same day
- Resume light activities within 24 hours
Doctors may recommend:
- Physiotherapy
- Core strengthening
- Posture correction
- Weight management
to improve long-term results.
Final Takeaway
Selective Nerve Root Block Injection is an advanced minimally invasive spine procedure that may help selected patients with:
✔ Sciatica
✔ Disc bulge
✔ Pinched nerve pain
✔ Lumbar radiculopathy
👉 Early diagnosis and proper treatment can help improve quality of life and reduce chronic nerve pain.
For Appointments:
Dr. Balaraju Naidu, Robotic Orthopedic Surgeon
ONUS Robotic Hospitals – Hyderabad
