Dorsal Root Ganglion (DRG) Stimulation

Advanced, Targeted Relief for Difficult-to-Treat Neuropathic Pain and Complex Regional Pain Syndrome

When chronic nerve pain doesn’t respond to medications, injections, or even traditional spinal cord stimulation, the problem often isn’t that you’ve run out of options—it’s that the pain is too focal, too specific, or in too difficult a location for those tools to reach. Dorsal Root Ganglion (DRG) stimulation was designed precisely for this gap. By targeting the small bundle of sensory nerve cell bodies where pain signals first organize before traveling to the brain, DRG stimulation delivers therapy directly to the source of focal neuropathic pain—the foot, knee, groin, hip, or other “hard-to-reach” areas that have historically been the most stubborn to treat.

What Is the Dorsal Root Ganglion?

The dorsal root ganglion is a cluster of sensory nerve cell bodies located just outside the spinal cord at each spinal level. Every pain signal from your skin, muscles, joints, and connective tissue passes through a DRG on its way to the brain. Think of it as a relay station: when the DRG becomes hyperactive or sensitized after an injury, surgery, or disease, it amplifies pain signals and can keep them firing long after the original tissue has healed. That amplification is the hallmark of neuropathic pain. Because the DRG is anatomically distinct, small, and dedicated to a precise region of the body, it gives clinicians a uniquely specific target for neuromodulation.

How DRG Stimulation Works

DRG stimulation uses a small implanted device—similar in size to a cardiac pacemaker—connected by thin wires (leads) placed near the specific DRG(s) responsible for your pain. The device delivers gentle electrical pulses that modulate how those sensitized nerve cells transmit pain signals. The result is reduced pain intensity in the targeted area without affecting nearby regions. Several features make this therapy unique:

• Focal precision. A single DRG corresponds to a specific dermatome, so therapy can be directed only at the painful region without “spillover” to areas you don’t want stimulated.
• Postural stability. Because the leads are anchored in the bony foramen of the spine, pain coverage stays consistent whether you’re lying down, sitting, or walking—a known limitation of older stimulator designs.
• Low-amplitude therapy. Many patients receive effective relief without the tingling sensation (paresthesia) that some other neurostimulation devices produce.
• Reversible and adjustable. Settings can be fine-tuned by your physician, and the entire system can be removed if needed.

Conditions Treated with DRG Stimulation

DRG stimulation is FDA-approved for the management of moderate to severe chronic intractable pain of the lower extremities in adults with Complex Regional Pain Syndrome (CRPS) types I and II (causalgia). Beyond this primary indication, a growing body of clinical evidence supports its use for other focal neuropathic pain conditions, including:

Complex Regional Pain Syndrome (CRPS)

CRPS is a debilitating disorder usually triggered by an injury, surgery, or fracture, in which pain becomes disproportionate to the inciting event. It is often accompanied by changes in skin color and temperature, swelling, sweating abnormalities, hair and nail changes, and severe sensitivity to light touch (allodynia). DRG stimulation has shown particularly strong outcomes for lower-extremity CRPS—the landmark ACCURATE trial demonstrated that DRG stimulation produced superior pain relief compared to traditional spinal cord stimulation at both 3 and 12 months in this patient population.

Post-Surgical Neuropathic Pain

Persistent nerve pain following procedures such as knee replacement, hip replacement, hernia repair, foot or ankle surgery, or thoracotomy can be among the most difficult pain syndromes to treat. Because these pains are typically focal and well-localized, they are often well-suited to DRG targeting.

Groin and Pelvic Pain (Including Post-Herniorrhaphy Pain)

The groin is notoriously difficult to cover with traditional spinal cord stimulation. DRG stimulation can selectively target the T12–L1 levels that innervate this region, offering relief for ilioinguinal, iliohypogastric, and genitofemoral neuralgias.

Peripheral Nerve Injuries and Causalgia

Direct damage to a peripheral nerve—from trauma, surgery, or compression—can result in persistent burning, electric, or shooting pain in the nerve’s distribution. DRG stimulation provides targeted relief that conventional therapies often cannot.

Phantom Limb Pain

Pain perceived in an amputated limb can be severe and treatment-resistant. DRG stimulation at the corresponding spinal levels has shown promise as a long-term option.

Painful Diabetic Peripheral Neuropathy (Focal Patterns)

For patients whose diabetic neuropathy is concentrated in specific areas—such as the feet—DRG stimulation may offer relief when medications have failed or caused intolerable side effects.

Other Focal Neuropathic Pain Syndromes

Including post-herpetic neuralgia, meralgia paresthetica, chronic post-traumatic foot pain, and other conditions in which pain is anatomically focused

DRG Stimulation vs. Traditional Spinal Cord Stimulation

Spinal cord stimulation (SCS) has been used successfully for decades and remains an excellent option for many patients with chronic pain, particularly diffuse pain in the back and legs. DRG stimulation is not a replacement for SCS but a complementary therapy designed to address its limitations.

Feature	Traditional SCS	DRG Stimulation
Target	Dorsal columns of the spinal cord	Specific dorsal root ganglion
Best for	Broader pain distributions (e.g., low back and legs)	Focal, well-localized pain
Coverage of foot, groin, knee	Often difficult	Excellent
Effect of position changes	Stimulation intensity may vary	Largely stable
Paresthesia (tingling)	Typically present (varies by waveform)	Often minimal or absent

For many patients—especially those with CRPS of the foot, post-surgical knee pain, or groin pain—DRG stimulation is the more appropriate first-line neuromodulation choice. In some cases it is offered as a salvage therapy when SCS has failed to provide adequate relief.

What to Expect: The Two-Stage Process

DRG stimulation is unique in that you get to “test drive” the therapy before committing to a permanent implant.

Stage 1: The Trial

The trial is a minimally invasive outpatient procedure. Under fluoroscopic (live X-ray) guidance, your physician places one or more thin leads through a small needle into the epidural space, advancing them to rest near the target DRG(s). The leads exit through the skin and connect to an external generator that you wear on a belt for approximately 5 to 7 days. During this trial period you go about your normal routine— within reasonable activity restrictions—and track how your pain, function, sleep, and quality of life respond. A trial is generally considered successful when it produces at least 50% pain relief in your primary pain area, along with meaningful improvement in function. The trial is fully reversible: when it ends, the leads are simply removed in a brief office visit.

Stage 2: The Permanent Implant

If the trial provides meaningful relief, the next step is the permanent implant—typically scheduled a few weeks later. New permanent leads are placed using the same technique, then connected to a small, nonrechargeable pulse generator implanted just under the skin (most commonly in the upper buttock or flank). Because the system is non-rechargeable, there is no daily charging routine to manage—you simply use the therapy. The implant is performed in an outpatient surgical setting under IV sedation (monitored anesthesia care). General anesthesia is generally not required, which means a lighter recovery and fewer anesthesiarelated risks. There is no hospital stay—you go home the same day.

After the Implant

You’ll have some activity restrictions for a few weeks while the leads settle and the incisions heal. During this period, you’ll work with your care team on programming—fine-tuning the stimulation settings to match your pain patterns. Programming is normal and expected; it is how the therapy is dialed in for the best long-term result. You’ll be given a personal controller to make adjustments within the parameters your physician sets.

Are You a Candidate?

You may be a candidate for DRG stimulation if:

• You have focal, well-localized neuropathic pain, typically in a lower extremity or the groin
• You have been diagnosed with CRPS type I or II
• Your pain has persisted despite appropriate medications, injections, physical therapy, or other interventions
• You have not had adequate relief from traditional spinal cord stimulation, or your pain pattern is one that SCS does not cover well
• You are medically able to undergo a minor surgical procedure
• You have undergone (or are willing to undergo) a psychological evaluation, which is standard before any neurostimulator implant

DRG stimulation may not be appropriate for patients with active infection, certain bleeding disorders, untreated severe depression or psychiatric conditions, or specific anatomic factors that prevent safe lead placement. A comprehensive consultation will determine whether this therapy is right for you.

Risks and Considerations

Like any procedure, DRG stimulation carries risks. The most commonly reported adverse events in clinical studies have been:

• Discomfort at the implantable pulse generator (IPG) pocket
• Lead migration, which may cause loss of stimulation coverage and sometimes require revision
• Infection at the incision sites (uncommon)
• Bleeding or bruising
• Allergic or skin reactions to dressings or implanted hardware
• Spinal headache or, rarely, dural puncture

Serious complications are uncommon, and most issues that arise are manageable with prompt follow-up. Your physician will review all risks specific to your case before the procedure. It’s also important to set realistic expectations: DRG stimulation is designed to substantially reduce pain and improve function. Most patients do not become pain-free, but meaningful improvements in sleep, walking tolerance, mood, opioid use, and overall quality of life are common goals—and often achieved— when the therapy is the right fit.

Why Choose Pain & Vascular for DRG Stimulation?

DRG stimulation is a precise, technique-dependent therapy. Outcomes depend not only on selecting the right patient but on accurate lead placement, thoughtful programming, and attentive long-term care. Our team brings:

• Specialized expertise in interventional pain medicine and advanced neuromodulation
• A thorough evaluation process that ensures DRG stimulation is the right tool for your specific pain pattern
• A coordinated trial-to-implant pathway with close follow-up
• Long-term programming support, because pain patterns evolve and so should your therapy settings
• Coordination with your other physicians, physical therapists, and mental-health providers to support whole-person recovery

If chronic neuropathic pain has not responded to conservative care, we welcome the opportunity to evaluate whether DRG stimulation can help you regain function and quality of life.