Comparison of Difference Hydrodissection for CTS

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 trial to assess the effect of different method of 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 short-axis group received one-dose ultrasound-guided hydrodissection with short-axis approach and long-axis group received one-dose ultrasound-guided injection with long-axis approach. No additional treatment after injection through the study period. The primary outcome is Boston Carpal Tunnel Syndrome Questionnaire (BCTQ) and secondary outcomes include visual analog scale (VAS), 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, 3rd and 6th month after the treatment.

Official Title
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Comparison of Difference Hydrodissection Technique in Patients With Carpal Tunnel Syndrome

Conditions
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Carpal Tunnel Syndrome

Intervention / Treatment
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* Procedure: Ultrasound-guided short-axis hydrodissection with 5cc normal saline
* Procedure: Ultrasound-guided long-axis hydrodissection with 3cc 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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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
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Short-axis hydrodissection<br>Ultrasound-guided short-axis hydrodissection with normal saline between carpal tunnel and median nerve | Procedure: Ultrasound-guided short-axis hydrodissection with 5cc normal saline<br>* Ultrasound-guided short-axis hydrodissection with 5cc normal saline between carpal tunnel and median nerve<br>|
| Active Comparator: Long-axis hydrodissection<br>Ultrasound-guided long-axis hydrodissection with normal saline between carpal tunnel and median nerve | Procedure: Ultrasound-guided long-axis hydrodissection with 3cc normal saline<br>* Ultrasound-guided long-axis hydrodissection with 3cc normal saline between carpal tunnel and median nerve<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, 3rd and 6th month after injection | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change from baseline of pain on 2nd week, 1st, 2nd, 3rd and 6th 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, 3rd and 6th 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, 3rd and 6th month after injection | Electrophysiological study 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, 3rd and 6th 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, short-axis, long-axis