The Effect of Hydrodissection for Carpal Tunnel Syndrome

Study Overview
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Brief Summary
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Carpal tunnel syndrome (CTS) is the most common peripheral entrapment neuropathy with involving compression of the median nerve in the carpal tunnel. Rather than other progressive disease, CTS is characterized by remission and recurrence. The hydrodissection could decrease the entrapment of nerve to restore blood supply. Despite the hydrodissection was pervasively used in clinical practice, current researches contain small participant without control group or randomized leading to foreseeable selection bias. The investigators design a randomized, double-blind, controlled trail to assess the effect after ultrasound-guided hydrodissection in patients with CTS.

Detailed Description
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After obtaining written informed consent, patients with bilateral CTS will been randomized into intervention and control group. Participants in intervention group received one-dose ultrasound-guided hydrodissection and control side received one-dose ultrasound-guided injection at subcutaneous layer beyond carpal tunnel. No additional treatment after injection through the study period. The primary outcome is visual analog scale (VAS) and secondary outcomes include Boston Carpal Tunnel Syndrome Questionnaire (BCTQ), cross-sectional area (CSA) of the median nerve, sensory nerve conduction velocity of the median nerve, and finger pinch strength. The evaluation was performed pretreatment as well as on the 2nd week, 1st, 2nd and 3rd month after the treatment.

Official Title
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The Effect of Hydrodissection for Patients With Carpal Tunnel Syndrome

Conditions
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Carpal Tunnel Syndrome

Intervention / Treatment
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* Procedure: Ultrasound-guided hydrodissection
* Procedure: Placebo ultrasound-guided injection
* Device: Ultrasound
* Drug: Normal Saline


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age between 20-80 year-old. Diagnosis was confirmed using an electrophysiological study Exclusion Criteria: Cancer Coagulopathy Pregnancy Inflammation status Cervical radiculopathy Polyneuropathy, brachial plexopathy Thoracic outlet syndrome Previously undergone wrist surgery or steroid injection for CTS

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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Accepts Healthy Volunteers

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
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Normal saline hydrodissection<br>Ultrasound-guided hydrodissection with normal saline between carpal tunnel and median nerve. | Procedure: Ultrasound-guided hydrodissection<br>* Ultrasound-guided hydrodissection with 5cc normal saline between carpal tunnel and median nerve.<br>Device: Ultrasound<br> <br> Drug: Normal Saline<br> <br> |
| Placebo Comparator: Normal saline<br>Ultrasound-guided injection with normal saline at subcutaneous layer beyond the carpal tunnel region | Procedure: Placebo ultrasound-guided injection<br>* Ultrasound-guided injection with 5cc normal saline at subcutaneous layer beyond carpal tunnel<br>Device: Ultrasound<br> <br> Drug: Normal Saline<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change from baseline of severity of symptoms and functional status on 2nd week, 1st, 2nd, 3rd and 6th month after injection | Boston carpal tunnel syndrome questionnaire (BCTQ) is a frequently used patient-based questionnaire for measurement of CTS which encompasses two components. In total, 11 questions and 8 items were evaluated to rate the symptom severity scale (SSS) and functional status scale (FSS), respectively. Both subscales range from 1 to 5 with a higher score indicating a higher degree of disability. The mean of total SSS and FSS divided with each item score were used for further analysis. | Pre-treatment, 2nd week, 1st, 2nd and 3rd month after injection | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change from baseline of pain on 2nd week, 1st, 2nd and 3rd month after injection | Digital pain severity or paresthesia/dysthesia was evaluated using visual analog scale (VAS). Pain score scale ranged from 0 to 10, with 10 indicating the most severe pain. | Pre-treatment, 2nd week, 1st, 2nd , 3rd and 6th month after injection | 
| Change from baseline of cross-sectional area of the median nerve on 2nd week, 1st, 2nd and 3rd month after injection | Using the musculoskeletal sonogram to measure the cross-sectional area of the median nerve before treatment and multiple time frame after treatment. | Pre-treatment, 2nd week, 1st, 2nd , 3rd and 6th month after injection | 
| Change from baseline of conduction velocity, amplitude of median nerve on 2nd week, 1st, 2nd and 3rd month after injection | Antidromic sensory nerve conduction velocity of the median nerve before treatment and multiple time frame after treatment. | Pre-treatment, 2nd week, 1st, 2nd , 3rd and 6th month after injection | 
| Change from baseline of finger pinch on 2nd week, 1st, 2nd and 3rd month after injection | The finger pinch strength was measured using dynamometer (Fabrication Enterprises Inc., USA). The subject was seated with shoulder adducted and neutrally rotated with the elbow flexed at 90°. The forearm and wrist were positioned in a neutral position for the palmar pinch | Pre-treatment, 2nd week, 1st, 2nd, 3rd and 6th month after injection | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Hydrodissection