Clinical trial Recruiting at 1 site Interventional Ages 18 to 75

Single- vs Double-Level Radiofrequency Ablation for Chronic Coccydynia

Official title: Comparison of Single- and Double-Level Radiofrequency Ablation for Chronic Coccydynia

Run by Marmara University · NCT07509593 · Data updated 2026-11-12

This study tests whether a single-level or double-level radiofrequency ablation around the coccygeal nerves provides better pain relief for adults with chronic tailbone pain who previously improved with a nerve block but later worsened.

Quick facts

Study typeInterventional
Ages18 Years to 75 Years
SexAll
Enrollment50 (estimated)
SponsorMarmara University
Academic / other
Locations1 site (Istanbul, PENDİK)
StatusRecruiting
StartedJune 1, 2026
Main results expectedJune 2027
Study endsNovember 2027
Registry record updatedJuly 9, 2026
Trial IDNCT07509593 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults with coccygeal pain persisting >2 months who previously had ≥50% pain relief from a ganglion impar block within the past 6 months and now have pain recurrence.

Probably not a fit

Patients who do not respond to prior ganglion impar block or who cannot tolerate or have contraindications to RFA may not benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This prospective randomized study compares two radiofrequency ablation techniques targeting the ganglion impar in people with chronic coccydynia. Participants are adults who had at least 50% pain relief from a prior ganglion impar block but have since experienced recurrence. The trial uses fluoroscopic guidance to perform either a single-level or a double-level lesion and follows participants for up to two months to assess pain, function, and quality of life. Outcomes include pain intensity and functional status measured with validated tools. The study is conducted at Marmara University in Istanbul and aims to determine which technique yields superior clinical benefit.

Why it matters

Potential benefit: If successful, the more effective RFA approach could offer longer-lasting pain relief and improved function for patients with chronic coccydynia.

How similar studies have gone: Direct comparisons of single- versus double-level ganglion impar RFA are limited; evidence from similar approaches in other pain conditions supports RFA as a useful option, but this study addresses a specific head-to-head comparison in coccydynia.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients with coccygeal pain lasting longer than 2 months
* Patients who experienced significant pain relief (≥50% reduction) after a ganglion impar block performed within the last 6 months, but whose pain has subsequently recurred
* Patients who provide informed consent to participate in the study

Exclusion Criteria:

* Acute coccydynia (pain duration less than 2 months)
* Patients who did not achieve significant benefit (\<50% pain reduction) from prior ganglion impar block
* Patients with severe neurological or psychiatric disorders that impair communication or ability to follow instructions

Where it's running

  • Marmara University Faculty of Medicine
    Istanbul, Pendi̇k, Turkey (Türkiye)
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.