NCT06886568

Ultrasound Guided Ganglion Impar Block

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 30 (estimated)
• Sponsor: Başakşehir Çam & Sakura City Hospital · Other Government
• Sex: All
• Age: 18 Years – 65 Years
• Healthy volunteers: Not accepted

Summary

The aim of this study is to evaluate feasibility, reliability and short term effectiveness of ganglion impar block with ultrasound in patients with chronic coccygodinia.

Detailed description

Ganglion impar blocks have long been used for coccydynia, either with a landmark-based technique or fluoroscopic guidance. With the growing use of ultrasound, ultrasound-guided ganglion impar block has become a viable alternative. Despite its frequent use in clinical practice, ultrasound has limitations in visualizing structures behind the bone, while fluoroscopy remains the gold standard. Further research is needed to evaluate its feasibility, safety, and efficacy. This study primarily aims to assess the feasibility and safety of ultrasound-guided ganglion impar block in coccydynia. Additionally, it will examine its short-term (1-month) efficacy.

Conditions

• Coccydynia
• Chronic Pain

Interventions

Type	Name	Description
PROCEDURE	Ultrasound-guided ganglion impar block	The procedure will be performed under sterile conditions and continuous monitoring. Using an ultrasound device with a 10-12 MHz linear probe, a 22G spinal needle will be advanced into the sacrococcygeal joint space using the out-of-plane technique. After confirming loss of resistance with a syringe containing normal saline as the needle exits the capsule anterior to the joint, approximately 1 mL of contrast medium will be injected. Anteroposterior (AP) and lateral fluoroscopic images will be obtained to verify the spread of the contrast agent. Once adequate contrast distribution is confirmed anterior to the coccyx on the lateral view, a mixture of dexamethasone and bupivacaine will be injected to complete the block. Procedures that cannot be completed or successfully visualized under ultrasound guidance will be finalized under fluoroscopic guidance.

Timeline

• Start date: 2025-04-01
• Primary completion: 2025-06-15
• Completion: 2025-07-15
• First posted: 2025-03-20
• Last updated: 2025-03-20

Locations

1 site across 1 country: Turkey (Türkiye)