Procedure Overview
Posterior sacroiliac (SI) joint fusion using the Nevro1 device is a minimally invasive surgical procedure that stabilizes the SI joint by promoting fusion (bone growth) between the sacrum and ilium from a posterior (back) approach. The Nevro1 device is designed with biocompatible materials that encourage bone integration, reduce micromotion, and alleviate pain associated with joint instability.
What Conditions It Treats
Chronic SI joint dysfunction
Degenerative sacroiliitis
Post-traumatic SI joint instability
Pregnancy-related pelvic girdle pain
Failed back surgery syndrome (FBSS) with SI joint involvement
Ideal Candidates
Patients who may benefit from this procedure typically:
Have chronic SI joint pain not responding to conservative care (e.g., physical therapy, injections)
Show positive diagnostic block responses
Have pain localized to the SI joint with associated mechanical dysfunction
Are in overall good health and able to undergo surgery
Are not planning pregnancy in the immediate future
Contraindications
Active infection (local or systemic)
Osteoporosis severe enough to prevent adequate implant fixation
Prior fusion or deformity that distorts normal SI joint anatomy
Untreated autoimmune flare or immunosuppressive complications
Known allergy or hypersensitivity to implant materials
Recovery Timeline
Week 1–2: Pain control, wound care, limited mobility, walker or crutches may be needed
Week 3–6: Gradual return to light daily activities
Month 2–3: Initiation of physical therapy; increased mobility
Month 3–6: Most patients resume moderate physical activity and work
Month 6–12: Full bony fusion develops; return to low-impact sports possible
Lifestyle Limitations Post-Procedure
In general, patients can be advised to walk and resume activities of daily living but with caution to limit strenuous activity including limiting bending or twisting at the waist
Avoid high-impact activities (running, jumping) for at least 6 months
Refrain from heavy lifting for 3 months
Sitting for longer than 45 minutes to one hour at a time should be avoided, and patients should be encouraged to take a 10 minute break to get up and move around or lie down before sitting again
Sexual activity and driving may resume after 2–4 weeks depending on comfort
Long-term: most patients can resume normal lifestyle with modifications for joint protection
Long-Term Outcomes
Clinical studies and registry data for similar posterior SIJ fusion systems (Nevro1 and comparable devices) show:
70–85% pain relief at 1 year
Improved function and reduced opioid use
Sustained outcomes at 2–5 years in long-term follow-up
Radiographic evidence of fusion in up to 90% of cases
Improved quality of life scores (e.g., Oswestry Disability Index)
Complication Rates
Infection: 1–2%
Nerve root irritation: <1%
Nonunion or incomplete fusion: ~5–10%
Implant migration or loosening: <2%
Revision surgery rate: 3–7% (These rates compare favorably to traditional lateral fusion approaches, which often carry higher surgical morbidity)
Risks for Autoimmune Compromised Patients
Higher risk of delayed healing and infection due to immune suppression
Increased likelihood of post-surgical inflammation or flare-ups
May require perioperative coordination with rheumatologist for immunosuppressive medication adjustment
Fusion success may be lower depending on disease activity and medication
Risk of Rejection
True implant “rejection” is rare as the Nevro1 device uses biocompatible materials (e.g., titanium or PEEK). However:
Patients with metal sensitivities should undergo testing
Localized inflammatory response may occur but is typically self-limiting
Allergic reactions to device coatings are extremely uncommon
Comparison to Other Posterior SIJ Fusion Devices
Feature | Nevro1 | PainTEQ LinQ | CornerLoc |
Approach | Posterior | Posterior | Posterior |
Implant Material | Titanium/PEEK | Nitinol | Allograft bone |
Incision Size | ~1 inch | ~1 cm | ~1.5 cm |
Stabilization Mechanism | Mechanical + biological fusion | Mechanical spring fixation | Bone graft fusion |
Imaging Used | Fluoroscopy | Fluoroscopy | Fluoroscopy |
FDA-Cleared | Yes | Yes | Yes |
Ideal Use | Long-term mechanical stability | Less invasive, faster recovery | Biologic integration only |
Note: Nevro1 offers more rigid fixation, making it well-suited for patients with moderate to severe instability or previous fusion failure.
Frequently Asked Questions
Q: Will the pain go away completely?
Many patients report a significant reduction (often 70–90%) in pain, but complete elimination is not guaranteed.
Q: Can the device move or come loose?
Implant migration is rare if post-op instructions are followed. Imaging confirms stability during follow-up.
Q: Will I need another surgery later?
Revision rates are low, especially if fusion occurs successfully. Maintaining bone health is key to long-term success.
Contact Your Care Team If You Experience:
Fever, chills, or drainage from the surgical site
Sudden increase in back or leg pain
Signs of implant intolerance (burning pain, allergic rash, etc.)
Additional Resources
Nevro website for Nevro1 device, click here
Study comparing posterior SIJ fusion to posterolateral and lateral fusion devices, click here
A Minimally Invasive Posterior Sacroiliac Joint Fixation Device
At Parkview Spine & Pain, we offer the Nevro1 as a cutting-edge, evidence-based treatment for sacroiliac joint dysfunction and pain. If you’re struggling with sacroiliac pain, the Nevro1 is a minimally invasive treatment that may effectively stabilize the sacroiliac joint and reduce pain.
👉 Schedule your consultation today to find out if you're a candidate for the Nevro1 Procedure.