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Dr. Balaji Charlu- Interventional Pain Newport Orthopedic Institute
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Common Causes of Chronic Back Pain Common Causes of Chronic Back Pain
Role of Epidural Steroid Injections in Role of Epidural Steroid Injections in neuropathic pain.
Role of Lumbar Facet Rhizotomy in somatic pain.p
Role of Neuromodulation (SCS) in treating Role of Neuromodulation (SCS) in treating Advanced Neuropathic Pain.
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Affects 60-85% of the adult population
Most common reason for missed work & doctor’s visit
Majority resolves in 8-10 weeks without treatment
Examples:Sprain & Strain
Degenerative Arthritis Flare UpMechanical Irritation of a Nerve Root
Discogenic TearDiscogenic TearBony Fracture or Contusion
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90% of acute back pain and “Disc Herniations” 90% of acute back pain and Disc Herniations will resolve in 2-3 mo regardless of treatment.
SURGERY INDICATIONS: Progressive Neurologic Weaknessg g Neurologic Injury to Bowel/Bladder Surgically correctable pain unamenable to all
conservative therapies
Surgical Instability or Nerve Compression Surgical Instability or Nerve Compression
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Short rest period (3-5 days), work limitationsp ( y ), Medications Physical Therapy Chiropractic Manipulation Acupuncture
TENS T ti TENS, Traction Sleep & Diet are very important.
Physician’s Role: Education, Diagnosis, Supervision“Glorified Cheerleader”
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Persistent Strain- Posture, Weight, and Body , g , yMechanics
Lumbar Spondylosis
Lumbar Stenosis
L b Di H i i Lumbar Disc Herniation
Di i P i Discogenic Pain
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Overuse Syndrome
Muscular Strain
Ligamentous Inflammation
MY BACK GOES OUT
WEEKEND WARRIOR STRAIN
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Disc DegenerationDisc Degenerationligament thickeningFacet hypertrophy Facet hypertrophy -Narrowing of Canal
Eventually leading to a compromise of the nerve roots existing the canal and their vascular roots existing the canal and their vascular supply
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Claudication with standing and walking
A b l Ambulatory Intolerance
Back Fatigue
Buttock, Calves, and Leg numbness with standingstanding
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Burning, Tingling, g, g g,Numbness in the legs
U ll i h i Usually with static position vs movement
Radiates in a dermatomal pattern
Sensory, Motor, and reflex changesreflex changes
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Discogenic Nerve Compression causes pain from:
Physical Compression of nerve rootnerve rootChemical Irritation of nerve root
Weakness, Numbness, Muscle Atrophy are signs of nerve damage
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Treatment Goals of Treatment Goals of Disc Disc HerniationHerniation
1. Accelerate recovery beyond what natural history can accomplish by itself
2.Improve the quality of life during and ft thafter the recovery process.
3 This is done by-3.This is done byControlling the acute inflammation.Active Strengthening and Stretching.g g g
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Relaive Rest Physical Therapy Sleep Medications Exercise and Movement Restrictions Back Brace for Stability
Reassurance i.e. Wait it Out!!
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Commonly used to relieve back pain when a Commonly used to relieve back pain when a mechanical spine nerve irritation is the cause.
Used for exacerbations of radicular and non-radicular pain from nerve inflammation.p
When combined with PT & NSAIDS, ESI can ,often delay or prevent surgical treatments
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I it i f l ti i fl t th t In essence, it is a powerful anti-inflammatory that reduces nerve inflammation at the disc nerve interface “The source”.
Epidurals wash the nerve root in a mixture of steroid and local anesthetic to reduce swelling.g
Epidurals may hasten the recovery time by reducing nerve irritation and edema around the reducing nerve irritation and edema around the disc herniation.
d l d l d h Epidurals do not resolve disc herniations
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Most common technique for large spreadfor large spread.
Used for stenosis, low back pain
Less specific Less specific
Risk of dural puncture.
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WHY DO A TFESI?WHY DO A TFESI?
Placed at a specific level
Steroid placed at disc nerve interface
Used for selective acute radicular painradicular pain
Risk of transient neuritis
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Is this the same as an epidural for labor pain?
Is this a permanent cure?
Can I only have three in a lifetime?
Do I need three injections in a row?
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Is this the same as a nerve block, or cortisone injection?
How important is the specific level of steroid How important is the specific level of steroid administration?
D d A th i (T b t t!!) t h Does one need Anesthesia (To be put out!!) to have an ESI?
Does one need Fluoroscopy to have an ESI?
How Risky is this procedure? How Risky is this procedure?
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TRANSIENT EFFECTS LONG TERM EFFECTSTRANSIENT EFFECTS LONG TERM EFFECTS
H l i O i Hyperglycemia HTN Gastritis
Osteoporosis Cataracts Glucose Intolerance Gastritis
Fluid Retention Insomnia (Wired!!)
Glucose Intolerance Avascular Necrosis Cushings Syndrome( )
Flushing (hot flashes) Soreness
g y Proximal Myopathy
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FACET JOINTS
1. Connect the posterior elements of the spineof the spine.
2. Prone to Degenerative changes
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• The facet joint carries up to 1/3 of the loading force of the lumbar spine
• Osteoarthritis of the joints leads to cartilage fissures, fraying, and erosions.
• Heterotopic Growth (bony spurs) leads to instability and inflammation.y
Summary: Degeneration of the facet joints account for approximately 10–15% of the cases with for approximately 10–15% of the cases with chronic low back pain
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Symptoms Anatomyy p
Aching, constant
y
Dull, or Sharp
Worse with movement
Localized but can refer to the hip/buttockp
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LUMBAR FACET BLOCK CERVICAL FACET BLOCK
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Silbergleit R et al. Radiographics 2001;21:927-939
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The facet joints are “innervated” by sensory j y ynerves that come off the posterior aspect of the corresponding spinal nerve.
These small sensory nerves “dorsal ramusmedial branches” form a lattice work of medial branches form a lattice work of sensation to the facet joints.
Key Point: Local anesthetic block of the MBB can temporary interrupt the pain signal carried
ifi f j ito a specific facet joint.
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A.K.A. Facet Rhizotomy, Medial Branch y,Neurectomy, “That burning procedure”
RFA utilizes a radiofrequency probe to electrochemically denervate the medial branches thus rendering the facet joints pain branches, thus rendering the facet joints pain free.
The medial branches do in fact re-innervate over time to a mild degree, whereby the RFA
b d i can be done again.
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First, the medial branch is localized using First, the medial branch is localized using sensory/ motor stimulation & imaging
Next, the targeted area is locally anesthetized for comfort
Finally, the RFA device generates a radial y, gsphere of “electrical frequency” at 80 degrees for 90 seconds at the tip of the probe over each MBB.
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It’s a semi-permanent procedure for facet joint p p jrelated low back pain.
N id i f h d No steroid is necessary for the procedure
It is useful for axial low back and neck pain from It is useful for axial low back and neck pain from degenerative spine conditions even after surgery
Little risk to the patient if it is done properly
f l f d l It is not useful for neuropathic “radicular pain”
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80 d 90 l i80 degrees, 90 sec. lesion
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Third tier advanced pain therapy for chronic Third tier advanced pain therapy for chronic severe Neuropathic pain that has exhausted all other modalities and treatments.
The SCS creates an electrical field around the posterior spinal column and modulates the pain signal percieved by the CNS
The nerve pain is converted to a soothing, tingling buzzing sensation.
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Failed Laminectomy Syndrome Failed Laminectomy Syndrome
Spinal Stenosis without operative options Spinal Stenosis without operative options
Chronic Radiculopathy Chronic Radiculopathy
Reflex Sympathetic Dystrophy Reflex Sympathetic Dystrophy
G li d P i h l N th Generalized Peripheral Neuropathy
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SCS is an electrical modulation of the spinal SCS is an electrical modulation of the spinal cord signal percieved by the CNS by stimulating the dorsal column fibers.
The SCS lead is placed via the epidural space p p pand configured to provide adequate coverage
A trial is done first in order to test the outcome prior to permanent implantation. (A Test Run)
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A screener will be attached to the electrode leads in the epidural space.
An electrical impulse will be delivered and An electrical impulse will be delivered and configured to cover one’s normal pain with a soothing tingling sensation.
You will be awake during the trial lead configuration to ensure adequate pain coverage.
You will leave the trial with an external battery pack and remote control to continue to monitor ppain coverage for 3-5 days.
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Successful Trial: 50% reduction in pain, improved % p , pfunction, and less opiate use.
Cognitive ability and motivation to use the device
Realistic expectations of benefits and limitations
Psychological Clearance to rectify any underlying psychiatric impediments (i.e. depression, anxiety)
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