Minimally Invasive Treatment for Chronic Sacroiliac Joint Pain
Persistent pain in the lower back, buttock, or pelvic region may sometimes originate from the sacroiliac (SI) joint, where the sacrum at the base of the spine connects with the pelvis.
When SI joint pain continues despite appropriate conservative treatment and diagnostic evaluation supports the sacroiliac joint as the pain source, sacroiliac joint radiofrequency ablation (RFA) may be considered for longer-lasting pain management.
SI joint radiofrequency ablation uses controlled radiofrequency energy to reduce pain signals carried by selected sensory nerve branches that supply the sacroiliac joint region.
At TOPS Institute, we provide image-guided sacroiliac joint radiofrequency ablation in Los Angeles and Beverly Hills as part of a diagnosis-driven approach to chronic low back and SI joint pain.
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What Is Sacroiliac Joint Radiofrequency Ablation?
Sacroiliac joint radiofrequency ablation is a minimally invasive procedure that uses controlled radiofrequency energy to reduce pain signals from selected sensory nerves supplying the sacroiliac joint region.
The procedure may also be referred to as:
- SI joint radiofrequency ablation
- Sacroiliac radiofrequency ablation
- SI joint RFA
- Sacral lateral branch radiofrequency ablation
- Radiofrequency neurotomy for SI joint pain
Unlike an SI joint injection, radiofrequency ablation does not place medication directly into the joint as its primary mechanism.
Instead, it targets selected sensory nerve branches that transmit pain signals from the posterior SI joint region.
The procedure does not fuse, reconstruct, or structurally alter the sacroiliac joint.
Its purpose is to reduce pain transmission.
What Is the Sacroiliac Joint?
The body has two sacroiliac joints, one on each side of the pelvis.
Each SI joint connects the sacrum, the triangular bone at the bottom of the spine, with the ilium, part of the pelvis.
These joints help:
- Transfer forces between the upper and lower body
- Provide pelvic stability
- Absorb mechanical stress
- Allow small amounts of controlled movement
Although the SI joints move much less than the hip or knee, they can become painful because of inflammation, degeneration, injury, altered biomechanics, or other conditions.
Learn More About Sacroiliac Joint Dysfunction / Sacroiliitis
What Does SI Joint Pain Feel Like?
Sacroiliac joint pain commonly affects the lower back and buttock region.
Symptoms may include:
- Pain on one side of the lower back
- Buttock pain
- Pain near the posterior pelvis
- Pain around the beltline
- Pain extending toward the hip
- Referred pain into the thigh
- Discomfort when standing from a seated position
- Pain with prolonged standing
- Pain when climbing stairs
- Discomfort when turning in bed
- Pain with certain transitional movements
Symptoms may occur on one or both sides.
Because lumbar spine disorders and hip conditions can produce similar symptoms, determining whether the SI joint is actually responsible is important before treatment.
What Causes Sacroiliac Joint Pain?
SI joint pain may develop for several reasons.
Potential contributing factors include:
- Sacroiliac joint dysfunction
- Sacroiliitis
- Degenerative changes
- Previous injury
- Repetitive mechanical stress
- Altered gait or biomechanics
- Pregnancy-related changes
- Leg-length differences
- Previous lumbar fusion or other spinal surgery
- Certain inflammatory conditions
The underlying cause should be considered as part of the treatment plan.
Radiofrequency ablation addresses pain transmission but does not necessarily correct the condition responsible for SI joint dysfunction.
How Does Sacroiliac Joint Radiofrequency Ablation Work?
Sensory nerve branches transmit pain signals from the posterior sacroiliac joint region toward the central nervous system.
During SI joint RFA, specialized needles are positioned near selected nerve targets.
Controlled radiofrequency energy generates heat at the treatment site, creating a targeted lesion that reduces the nerve’s ability to transmit pain signals.
The procedure may target sacral lateral branches and other appropriate sensory nerve targets, depending on the technique used.
The nerves are not necessarily permanently eliminated.
Over time, treated nerve fibers may regenerate, which is one reason pain can eventually return.
Why Are Diagnostic Blocks Important Before SI Joint RFA?
Chronic lower back and buttock pain can originate from several structures.
Possible pain generators include:
- Lumbar facet joints
- Intervertebral discs
- Spinal nerves
- Hip joints
- Muscles
- Sacroiliac joints
Symptoms and imaging alone may not always identify the source.
For this reason, diagnostic injections or nerve blocks may be used as part of the evaluation before radiofrequency ablation.
If temporarily blocking the appropriate pain pathway produces meaningful improvement in the patient’s typical symptoms, the response can help determine whether SI joint RFA may be appropriate.
The exact diagnostic protocol can vary based on clinical circumstances, guidelines, and insurance requirements.
What Is the Treatment Pathway for SI Joint Radiofrequency Ablation?
For appropriately selected patients, the pathway may include:
Suspected Sacroiliac Joint Pain
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Clinical Evaluation
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Diagnostic SI Joint Injection and/or Appropriate Diagnostic Nerve Blocks
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Meaningful Temporary Relief of Typical Pain
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Confirmation of SI Joint-Mediated Pain
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Sacroiliac Joint Radiofrequency Ablation
This diagnostic process helps reduce the likelihood of performing RFA when the patient’s pain originates from another structure.
SI Joint Radiofrequency Ablation vs. SI Joint Injection
Both procedures may be used in the evaluation or management of sacroiliac joint pain, but they work differently.
Sacroiliac Joint Injection
An SI joint injection places medication directly into the sacroiliac joint.
Depending on the purpose of the procedure, it may contain local anesthetic and/or corticosteroid medication.
An SI joint injection may provide diagnostic information and may help reduce inflammation and pain.
Sacroiliac Joint Radiofrequency Ablation
RFA targets selected sensory nerve branches associated with the SI joint region.
Rather than injecting medication into the joint, it uses radiofrequency energy to reduce transmission of pain signals.
For appropriately selected patients, RFA may provide longer-lasting pain reduction than the temporary effects of a diagnostic block.
Learn More About Sacroiliac Joint Injections
SI Joint RFA vs. Lumbar Radiofrequency Ablation
These procedures both use radiofrequency energy but target different pain pathways.
SI Joint Radiofrequency Ablation
Targets sensory nerve branches associated with the sacroiliac joint region.
Lumbar Radiofrequency Ablation
Targets medial branch nerves that carry pain signals from the lumbar facet joints.
This distinction matters because lumbar facet pain and SI joint pain can occur in similar areas of the lower back.
Learn More About Lumbar Radiofrequency Ablation
SI Joint RFA vs. Lumbar Epidural Steroid Injection
An SI joint radiofrequency ablation and lumbar epidural steroid injection are used for different types of pain.
SI Joint RFA
May be considered for confirmed chronic sacroiliac joint-mediated pain.
Lumbar Epidural Steroid Injection
Targets inflammation around spinal nerve roots and may be considered for lumbar radiculopathy or sciatica.
A patient with localized buttock pain from the SI joint requires a different treatment pathway than a patient with shooting leg pain caused by an irritated spinal nerve.
Learn More About Lumbar Epidural Steroid Injections
Sacroiliac Joint Pain vs. Sciatica
SI joint pain and sciatica can sometimes feel similar, but they arise from different structures.
Sacroiliac Joint Pain
May cause:
- Lower back pain
- Buttock pain
- Pelvic-region pain
- Referred pain toward the hip or thigh
- Pain with transitional movements
Sciatica
Commonly involves:
- Shooting leg pain
- Burning pain
- Electric-like sensations
- Numbness
- Tingling
- Symptoms following the distribution of an affected lumbar nerve root
SI joint radiofrequency ablation does not treat lumbar nerve-root compression.
Learn More About Lumbar Radiculopathy (Sciatica)
Who Is a Candidate for Sacroiliac Joint Radiofrequency Ablation?
SI joint RFA may be considered for selected patients with persistent SI joint-mediated pain.
Potential candidates may include patients who:
- Have chronic sacroiliac joint pain
- Have lower back or buttock pain consistent with SI joint dysfunction
- Have persistent symptoms despite conservative treatment
- Have diagnostic findings supporting the SI joint as the pain source
- Experience meaningful temporary relief from appropriate diagnostic injections or nerve blocks
- Are medically appropriate for radiofrequency ablation
Treatment selection should be based on the overall clinical picture rather than imaging findings alone.
How Is Sacroiliac Joint Radiofrequency Ablation Performed?
SI joint RFA is generally performed as an outpatient procedure using image guidance.
The procedure typically involves:
- The patient is positioned to allow access to the posterior pelvis and sacral region.
- The treatment area is cleaned and prepared.
- Local anesthetic may be used to numb the skin and surrounding tissues.
- Using image guidance, specialized needles are carefully positioned near the selected sensory nerve targets.
- Testing may be performed to help confirm appropriate needle placement.
- Controlled radiofrequency energy is delivered to create targeted lesions.
- Multiple nerve targets may be treated when clinically appropriate.
- The needles are removed, and the patient is monitored following the procedure.
The exact technique and nerve targets depend on the patient’s anatomy and procedural approach.
Why Is Image Guidance Used?
The sensory nerve branches associated with SI joint pain are small and located near specific anatomical landmarks around the sacrum and pelvis.
Image guidance helps the physician accurately identify these landmarks and position treatment needles near the intended targets.
Precise placement is important because radiofrequency ablation is designed to affect selected pain-transmitting nerves rather than surrounding tissues.
How Long Does SI Joint Radiofrequency Ablation Last?
The duration of pain relief varies.
For appropriately selected patients, improvement may last for several months or longer.
Eventually, treated sensory nerve fibers may regenerate and begin transmitting pain signals again.
The underlying SI joint condition also remains present.
For these reasons, SI joint radiofrequency ablation is considered a pain-management treatment rather than a permanent cure for sacroiliac joint dysfunction.
How Quickly Does SI Joint RFA Work?
Improvement is not necessarily immediate.
Some patients begin to notice pain reduction relatively soon, while others may require several days or longer.
Temporary soreness or increased discomfort around the treatment area may occur following the procedure.
Patients should follow their physician’s post-procedure instructions and report unexpected or concerning symptoms.
Can Sacroiliac Joint RFA Be Repeated?
Repeat treatment may be considered for selected patients.
If the initial SI joint RFA provides meaningful improvement and the same pain later returns as the treated nerves regenerate, reevaluation can help determine whether another procedure is appropriate.
Factors may include:
- Degree of previous pain relief
- Duration of improvement
- Functional improvement
- Current symptoms
- Changes in medical status
- Clinical guidelines
Repeat RFA should be individualized.
What Is Recovery Like After SI Joint RFA?
SI joint radiofrequency ablation is generally an outpatient procedure.
Patients may experience temporary:
- Injection-site soreness
- Buttock or lower back tenderness
- Muscle discomfort
- Increased pain around the treatment area
Activity recommendations vary based on the individual patient.
As pain improves, patients may be better able to participate in:
- Physical therapy
- Core strengthening
- Pelvic stabilization exercises
- Mobility training
- Appropriate exercise
These strategies may help address some of the functional or biomechanical factors associated with SI joint pain.
Is Sacroiliac Joint Radiofrequency Ablation Safe?
SI joint RFA is minimally invasive, but all medical procedures have potential risks.
Potential risks and side effects may include:
- Temporary soreness
- Temporary increase in pain
- Bruising
- Bleeding
- Infection
- Numbness or altered sensation
- Neuritis or nerve irritation
- Injury to surrounding structures
- Other uncommon complications
Patients taking blood-thinning medications or those with certain medical conditions may require additional procedural planning.
Potential benefits, risks, and alternatives should be reviewed before treatment.
Does SI Joint RFA Fix Sacroiliac Joint Dysfunction?
No.
Radiofrequency ablation does not reconstruct, stabilize, or fuse the sacroiliac joint.
It also does not reverse arthritis or other structural changes.
Its purpose is to reduce pain signals transmitted from the SI joint region.
For this reason, RFA may be combined with other strategies designed to improve strength, movement, and function when appropriate.
When Is SI Joint RFA Not the Right Treatment?
SI joint radiofrequency ablation is not appropriate for every type of lower back or buttock pain.
A different treatment pathway may be necessary when symptoms primarily result from:
- Lumbar radiculopathy
- Lumbar disc herniation
- Lumbar spinal stenosis
- Lumbar facet joint pain
- Hip joint pathology
- Other musculoskeletal conditions
If symptoms are caused by a lumbar spinal nerve, for example, an epidural treatment may be more appropriate.
If pain originates from the lumbar facet joints, lumbar medial branch blocks and lumbar RFA may be considered instead.
The diagnosis should guide the procedure.
Sacroiliac Joint Radiofrequency Ablation at TOPS Institute
Lower back and buttock pain can be difficult to diagnose because several structures can produce similar symptoms.
At TOPS Institute, we take a diagnosis-driven approach to sacroiliac joint radiofrequency ablation.
We evaluate:
- Location and pattern of pain
- Movements and activities that reproduce symptoms
- Physical examination findings
- Neurological findings
- Relevant imaging
- Previous treatments
- Response to diagnostic injections or nerve blocks
before determining whether SI joint RFA is appropriate.
For patients with confirmed sacroiliac joint-mediated pain, radiofrequency ablation may provide longer-lasting pain reduction by decreasing signals transmitted through selected sensory nerve branches.
For patients seeking sacroiliac joint radiofrequency ablation in Los Angeles or Beverly Hills, TOPS Institute provides personalized interventional pain management focused on identifying the source of pain before proceeding with treatment.
Schedule a Consultation
Frequently Asked Questions About Sacroiliac Joint Radiofrequency Ablation
What is sacroiliac joint radiofrequency ablation?
Sacroiliac joint radiofrequency ablation is a minimally invasive procedure that uses controlled radiofrequency energy to reduce pain signals carried by selected sensory nerves supplying the SI joint region.
What does SI joint radiofrequency ablation treat?
It may be considered for appropriately selected patients with chronic sacroiliac joint-mediated pain that persists despite conservative treatment.
Does SI joint RFA cure sacroiliitis?
No. RFA does not cure inflammation, reverse arthritis, or correct structural SI joint dysfunction. It targets sensory nerves to reduce pain transmission.
Do I need a diagnostic injection before SI joint RFA?
Diagnostic SI joint injections and/or appropriate nerve blocks may be used to help confirm that the SI joint is responsible for the patient’s pain before radiofrequency ablation. The exact protocol depends on the individual patient, clinical guidelines, and insurance requirements.
What is the difference between an SI joint injection and SI joint RFA?
An SI joint injection delivers medication into the joint. RFA uses radiofrequency energy to reduce pain transmission through selected sensory nerves associated with the joint.
Learn More About Sacroiliac Joint Injections
Is SI joint RFA the same as lumbar RFA?
No. SI joint RFA targets sensory nerves associated with the sacroiliac joint region. Lumbar RFA targets medial branch nerves associated with the lumbar facet joints.
Does SI joint RFA help sciatica?
It is not designed to treat classic sciatica caused by lumbar nerve-root irritation or compression. Patients with lumbar radiculopathy generally require a different treatment approach.
How long does sacroiliac joint radiofrequency ablation last?
Results vary. For appropriately selected patients, pain reduction may last for several months or longer. Symptoms can eventually return as treated nerve fibers regenerate.
Can SI joint RFA be repeated?
Repeat treatment may be considered when the initial procedure provided meaningful relief and the same SI joint-mediated pain later returns.
Is sacroiliac joint radiofrequency ablation surgery?
No. SI joint RFA is a minimally invasive interventional procedure. It does not involve surgically fusing, replacing, or reconstructing the sacroiliac joint.
Can SI joint radiofrequency ablation prevent surgery?
RFA may help manage pain for selected patients, but it cannot guarantee that future surgery will be avoided. Whether surgical treatment is necessary depends on the underlying condition, severity of symptoms, and response to nonsurgical care.
Find Out if SI Joint Radiofrequency Ablation Is Right for You
Pain around the lower back and buttock can originate from the sacroiliac joint, lumbar spine, hip, or surrounding soft tissues. Identifying the source is an important first step before choosing a procedure.
Schedule a consultation with TOPS Institute in Los Angeles or Beverly Hills to determine whether sacroiliac joint radiofrequency ablation may be appropriate for your chronic SI joint pain.
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