LINQ® Procedure vs. Conventional Medical Management for Sacroiliac Dysfunction

Exclusion Criteria

• •1. Pain Source Uncertainty a. Inability to confirm, in the Investigator's clinical judgment, that the subject's primary pain generator is the sacroiliac joint.
• •2. Alternative Primary Spine Pathology
• •a. Presence of severe low back pain attributable to other spinal pathology, including but not limited to lumbar disc degeneration, lumbar disc herniation, lumbar spondylolisthesis, lumbar spinal stenosis, lumbar facet degeneration, or lumbar vertebral body fracture.
• •3. Other Sacroiliac Pathology
• •a. Presence of known sacroiliac joint pathology other than degenerative SIJ dysfunction, including inflammatory sacroiliitis (e.g., ankylosing spondylitis or other HLA-associated spondyloarthropathies), tumor, infection, acute fracture, or crystal arthropathy.
• •4. Non-SIJ Pain Syndromes
• •a. History of coccydynia or prior coccygectomy, endometriosis, cluneal neuralgia, or pudendal neuralgia.
• •5. Recent Sacral Interventions
• •a. Prior sacral radiofrequency ablation performed within 6 months prior to enrollment.
• •6. Recent Pelvic Trauma
• •a. History of major pelvic trauma within 12 months prior to enrollment.
• •7. Severe Osteoporosis
• •a. Prior diagnosis or suspicion of severe osteoporosis, defined as a prior bone mineral density T-score of \< -2.5 or a history of osteoporotic fracture.
• •8. Medications Detrimental to Bone or Soft-Tissue Healing
• •a. Current use of medications known to adversely affect bone quality or soft-tissue healing, as determined by the Investigator.
• •9. Anatomic Constraints
• •a. Anatomic anomalies or defects that, in the Investigator's opinion, would preclude safe or biomechanically appropriate device placement.
• •10. Systemic Inflammatory or Rheumatologic Disease
• •a. Presence of a chronic inflammatory rheumatologic condition, such as rheumatoid arthritis.
• •11. Centralized Pain Syndromes
• •a. Current diagnosis of fibromyalgia.
• •12. Infection Risk
• •a. Evidence of current local or systemic infection that would increase surgical risk.
• •13. High-Dose Opioid Therapy (≥90 MME/day)
• •a. Current use of systemic opioid analgesics at Screening/Baseline with an average daily dose ≥90 morphine milligram equivalents (MME/day), based on medication reconciliation (prescription records and subject report) and standard MME conversion factors.
• •14. Current Nicotine Use (Self-Reported)
• •a. Self-reported use of any nicotine-containing products (including smoking, vaping/e-cigarettes, cigars, pipes, smokeless tobacco, nicotine pouches, and nicotine replacement products) within 6 weeks prior to Screening/Baseline.
• •15. Secondary Gain or Litigation
• •a. Currently receiving or actively seeking workers' compensation or disability benefits or involved in injury-related litigation.
• •16. Pregnancy
• •a. Currently pregnant or planning to become pregnant within two (2) years following enrollment, as self-reported.
• •17. Vulnerable Populations
• •a. Individuals who are prisoners or wards of the state.
• •18. Substance Abuse
• •a. Known or suspected active drug or alcohol abuse, including opioid misuse.
• •19. Psychiatric Conditions
• •a. Diagnosed psychiatric disorder (e.g., schizophrenia, major depressive disorder, personality disorder) that, in the Investigator's judgment, could interfere with study participation.
• •20. Concurrent Interventional Research
• •a. Current participation in another clinical trial.
• •21. Neurologic Conditions Affecting Rehabilitation
• •a. Presence of a significant neurologic disorder that would interfere with participation in physical therapy or post procedural rehabilitation.
• •22. Other Confounding Medical Conditions a. Any other medical condition or pain condition not intended to be treated in this study that, in the Investigator's judgment, could interfere with study procedures, accurate pain reporting, or interpretation of study endpoints.