Effect of Catheter Type on Efficacy of Percutaneous Caudal Adhesolysis

Study Overview
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Brief Summary
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The approach toward FBSS involves conservative management that consists of physical therapy and medication which aims to optimize gait and posture and can improve muscle strength and physical function

Detailed Description
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The international association for the study of pain has defined failed back syndrome as persistent pain despite spine surgery in the same topographical area. Several causes have been introduced for FBSS including pressure on the nerve root due to disc re-herniation or retained disc fragment, epidural fibrosis, acquired stenosis, and segmental instability. Thus, FBSS is a syndrome with diverse etiologies and noticeable heterogeneity among patients. However, about 20% to 36% of FBSS occur due to epidural fibrosis, which is a progressive disease. The approach toward FBSS involves conservative management that consists of physical therapy and medication which aims to optimize gait and posture and can improve muscle strength and physical function. Oral pharmacological treatment of FBSS is multimodal and increasingly controversial. Treatments include antiepileptics, non-steroidal anti-inflammatory drugs, oral steroids, antidepressants, and opioids including injections, and finally surgical options as a last line therapy. Other modalities including minimally invasive procedures like epidural injections, Epidural steroid injections (ESIs) are the most commonly performed procedure in pain clinics around the world. These can be administered primarily by three approaches: transforaminal, interlaminar, or caudally, and are indicated for symptoms of radiculopathy. Also radiofrequency ablation of nerves are often used to provide sustained relief that a diagnostic block or therapeutic injection cannot provide. Successfully targeting the intended nerve is achieved, maximizing the size of the lesion. Spinal cord stimulation (SCS) is a nother treatment modality that has shown tremendous potential in the management of FBSS. Adhesions can theoretically be lysed, thereby improving baseline pain scores and drug delivery of the ESI. Lysis of adhesions typically occurs by delivering hyaluronidase with hypertonic saline into the epidural space. The use of hyaluronidase with steroid may be more effective and have longer duration of effect than either one alone. Finally, surgical revision for FBSS is associated with a high morbidity with corresponding low rates of success. Percutaneous adhesiolysis (PA), is a minimally invasive technique, that might be useful in the treatment of chronic pain refractory to conservative treatments. The basic idea behind PA is inserting a catheter in the ventral epidural space could directly break up perineural/epidural adhesions, that act as physical barriers to the perineurally deposited drugs but also cause neural irritation predisposing to neural inflammation.

Official Title
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Effect of Catheter Type on Efficacy of Percutaneous Caudal Adhesolysis in Failed Back Surgery Syndrome.

Conditions
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Failed Back Surgery Syndrome

Intervention / Treatment
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* Procedure: caudal adhesolysis using RACZ Catheter
* Procedure: caudal adhesiolysis using NAVI Catheter


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: previous back surgery of at least 6 months duration. age ≥ 18. failure of conventional pharmacological management. Exclusion Criteria: cauda equina syndrome. pregnant or lactating women. anti-coagulant therapy.

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: double-blinded, prospective study
Masking: Triple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Epidural Catheter<br>procedure Will be performed under sterile precautions utilizing fluoroscopy, RK needle.patient will be placed prone with a pillow under the abdomen.The sacral area draped from the top of the iliac crest to the bottom of the buttocks.The sacral Corns and the sacral hiatus will be palpated,is in the gluteal fold opposite the affected side will be infiltrated with lidocaine16gauge RK needle will be passed through the described entry point advanced to a point below the S3foramen to prevent S3nerve root damage.Placement will be confirmed by lateral and anteroposterior fluoroscopic views and after aspiration is negative for blood and CSF10mL of iohexol will be injected under fluoroscopy.Once the needle placement is confirmed to be in the epidural space, a lumbar epidurogram will be carried out utilizing approximately2to5 mL of contrast. then the bevel of the needle should face the ventrolateral aspect of the caudal canal. | Procedure: caudal adhesolysis using RACZ Catheter<br>* caudal adhesolysis for patients with failed back surgery syndrome using RACZ Catheter under fluroscopy<br>Procedure: caudal adhesiolysis using NAVI Catheter<br>* caudal adhesolysis for patients with failed back surgery syndrome using NAVI Catheter under fluroscopy<br>|
| Active Comparator: RACZ Catheter<br>same as procedure described above but using RACZ Catheter set | Procedure: caudal adhesolysis using RACZ Catheter<br>* caudal adhesolysis for patients with failed back surgery syndrome using RACZ Catheter under fluroscopy<br>|
| Active Comparator: NAVI catheter<br>same as procedure described above but using NAVI Catheter set | Procedure: caudal adhesiolysis using NAVI Catheter<br>* caudal adhesolysis for patients with failed back surgery syndrome using NAVI Catheter under fluroscopy<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| pain score | -difference in numeric rating scale at 6 months after intervention, minmal value 0 and maximum value 100 which is worst(more pain intensity) | 6 months after intervention | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| functional outcome | The Oswestry Disability Index,minmal value 0 and maximum value 50 which is worst(complete disability) | 6 months after intervention | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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caudal adhesiolysis, catheter type