RFA Using Multi-Tined Electrodes Vs.Traditional Electrodes for Lumbar Spondylosis

Study Purpose

Spondylosis is an anatomical defect of the small facet joints between the spinal vertebrae often due to load bearing and mechanical wear. It is a major contributor to lower back pain. The current standard of care in patients diagnosed with spondylosis in the lower back is to perform a radiofrequency ablation (RFA) of the lumbar medial branch nerves which carry the pain signals from that region to the brain. RFA accomplishes this by using radio waves transmitted through inserted electrodes. This leads to a temporary lesion or "burn"; stopping the pain signals from being transmitted as as well as changing the pain signals themselves. The electrodes themselves do not heat up but instead cause ions in the surrounding tissue to vibrate and heat up. When performing the procedure at the UAMS pain clinic, one can use the Stryker system with a single electrode end which protrudes out of the cannula or the Stratus Nimbus electrode with two prongs which expand in a "V"; formation along the sides of the cannula. While testing in chicken tissue shows that the latter electrode type produces a larger lesion size, anecdotal evidence suggests that it may lead to longer term pain relief. As such, the choice is currently left up to physician preference as both are FDA approved for use in this condition. This study is trying to assess if the larger lesion size results in a reduction in impairment of activities of daily living due to pain measured by the patient-reported PROMIS (Patient Reported Measurement Information System)-29 questionnaire. The PROMIS-29 is given to all patients who are seen in the UAMS Pain Clinic at initial and follow-up visits. In this study we would like to randomize what electrode and cannula set is used in RFA for patient's who are already going to be receiving the procedure for treatment for their spondylosis. The study team would then compare the PROMIS outcomes between cases that used the Stryker and Stratus Nimbus electrodes at 1,3,6, and 9. It is hypothesized that the Nimbus electrode will result in a greater reduction and improvement in PROMIS scores for a longer duration than the Stryker electrode.

Recruitment Criteria

Accepts Healthy Volunteers Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms	No
Study Type An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes. An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes. Searching Both is inclusive of interventional and observational studies.	Interventional
Eligible Ages	18 Years and Over
Gender	All

More Inclusion & Exclusion Criteria

Inclusion Criteria:

1. Greater than 18 years of age. 2. Presenting with chronic non-radicular lower back pain. 3. Failure of conservative treatment such as physical therapy or NSAID usage. 4. Diagnosis of lumbar facet mediated lower back pain by a board-certified chronic pain physician via two sets of prognostic lumbar MBBs with 0.5cc of 0.5% bupivacaine with >80% pain relief.

Exclusion Criteria:

1. History of known coagulopathy. 2. > 3 American Society of Anesthesiologists Classification. 3. Pregnancy. 4. Spinal hardware between L3 and S1. 5. Allergies to injection medications. 6. English illiteracy. 7. Pain improvement following physical therapy or NSAID usage. 8. Previous history of attempted lumbar RFA

Trial Details

Trial ID: This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.	NCT06477094
Phase Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans. Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data. Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs. Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.	N/A
Lead Sponsor The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.	University of Arkansas
Principal Investigator The person who is responsible for the scientific and technical direction of the entire clinical study.	Jarna Shah, MD
Principal Investigator Affiliation	University of Arkansas
Agency Class Category of organization(s) involved as sponsor (and collaborator) supporting the trial.	Other
Overall Status	Recruiting
Countries	United States
Conditions The disease, disorder, syndrome, illness, or injury that is being studied.	Lumbar Spondylosis

Additional Details

This study is a single center double-blinded prospective randomized clinical trial. Patients will be recruited from the pool of patients seen by the Principal Investigators (PIs) and collaborating physicians in the UAMS pain management clinic through the Department of Anesthesiology. Candidacy for RFA is determined by the standard of care which includes diagnosis of axial low back pain without lower extremity radiation or other primary pain generators. These patients should not have had previous RFA's in the lumbar region before. These patients should receive greater than 80% pain relief following two diagnostic MBBs completed at separate times. In routine care, physicians discuss with patients the risks and benefits associated with the RFA procedure. In order to establish a baseline level of pain, disability, and impairment of daily living, patients are routinely asked to complete the PROMIS-29 questionnaire to the best of their ability. Once patients receive their second MBB they are to return 2 to 4 weeks later for RFA should they meet the necessary 80% pain relief. At the time of the procedure, a simple randomization performed by a staff member not involved in the patient's care, will be used to determine if the patient's procedure will involve the use of the Stratus Nimbus or the Stryker Venom electrode and cannula set. The provider performing the procedure will be made aware of which electrode is to be used. However, patients will be blinded to the group to which they were randomized. Patients will continue with conventional RFA as per standard of care. Patients will then be contacted at 1,3,6, and 9 months for assessment of response to intervention including the PROMIS-29 questionnaire. Scores are then compared to those taken at baseline to determine efficacy of treatment and inform future care.

Arms & Interventions

Arms

Active Comparator: Stratus Nimbus

Patients will receive their radiofrequency ablation procedure of the lumbar medial branch nerves with the Stratus Nimbus Electrode.

Active Comparator: Stryker Venom

Patients will receive their radiofrequency ablation procedure of the lumbar medial branch nerves with the Stryker Venom Cannula.

Interventions

Device: - Stratus Nimbus Electrosurgical RF Multi-Tined Expandable Electrode

Radiofrequency Ablation of Lumbar Medial Branch Nerves using the Stratus Nimbus Electrode

Device: - Stryker Venom Radiofrequency Cannula

Radiofrequency Ablation of Lumbar Medial Branch Nerves using the Stryker Venom Cannula

Contact a Trial Team

If you are interested in learning more about this trial, find the trial site nearest to your location and contact the site coordinator via email or phone. We also strongly recommend that you consult with your healthcare provider about the trials that may interest you and refer to our terms of service below.

Little Rock, Arkansas

Status

Recruiting

Address

University of Arkansas for Medical Sciences

Little Rock, Arkansas, 72205

Site Contact

Jarna Shah, MD

[email protected]

6308648577

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