Ultrasound Guided Ganglion Impar Block

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

NOT_YET_RECRUITING

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-04-01

Study Completion Date

2025-07-15

Brief Summary

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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.

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Detailed Description

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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

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Coccydynia Chronic Pain

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Injection Group

Ganglion impar block will be applied under ultrasound guidance

Group Type EXPERIMENTAL

Ultrasound-guided ganglion impar block

Intervention Type PROCEDURE

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.

Interventions

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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.

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* Age between 18-65 years.
* Coccydynia persisting for at least three months.
* Being scheduled for a ganglion impar block in the pain medicine outpatient clinic.
* Having inadequate response to medical and conservative treatments.
* Aggreeing to undergo the interventional procedure and participate in the study.

Exclusion Criteria

* Local infection at the injection site.
* Bleeding disorders or diseases and drugs that may cause bleeding diatesis (e.g. renal failure, liver failure, anticoagulant treatments)
* History of allergic reaction to the medications to be used.
* Pregnancy

Minimum Eligible Age

18 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No