Comparison of Ganglion Impar Radiofrequency Ablation and Phenol Neurolysis Techniques for Chronic… (NCT07021365) | Clinical Trial Compass
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Comparison of Ganglion Impar Radiofrequency Ablation and Phenol Neurolysis Techniques for Chronic Coccydynia Treatment
Turkey (Türkiye)30 participantsStarted 2025-07
Plain-language summary
Radiofrequency ablation and phenol neurolysis of the ganglion impar are methods used in cases unresponsive to medication, particularly in patients who derive short-term or partial relief from the initial ganglion impar block. In clinical practice, clinicians frequently use these two injections in patients with treatment-resistant pain who only partially benefit from the initial blockade procedure.
To date, the medical literature lacks a comprehensive study comparing the efficacy of radiofrequency ablation and phenol neurolysis in patients who partially benefit from ganglion impar block. Therefore, this study is designed to compare the effectiveness of these two methods in patients with chronic coccydynia.
Who can participate
Age range
18 Years – 65 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Age between 18 and 65 years
* Presence of chronic coccydynia lasting at least 3 months
* Pre-procedural pain score of 4 or higher on the Numeric Rating Scale (NRS)
* Patients who have undergone a ganglion impar block within the last 3 months and experienced limited benefit (i.e., less than 50% reduction in pain compared to pre-treatment) and/or short-term relief (less than 4 weeks)
Exclusion Criteria:
* History of surgery involving the sacrococcygeal region
* Prior treatment with ganglion impar phenol neurolysis or radiofrequency ablation
* Coagulopathies (bleeding disorders)
* Infection
* Spondylolisthesis, scoliosis, or lumbar spinal stenosis
* Malignancy
* Pregnancy
* History of allergic reaction to the administered injectates
* History of major psychiatric illness
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.