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CompletedNCT01972165Updated Oct 30, 2013

Comparison of Subjective Outcomes and Changes of Ultrasonographic Morphology of Median Nerves of Mini-open and Endoscopic Carpal Tunnel Release in Patients With Idiopathic Carpal Tunnel Syndrome

An interventional study of Mini-incision carpal tunnel release and Endoscopic carpal tunnel release in Idiopathic Carpal Tunnel Syndrome, sponsored by Yonsei University. Completed at 1 site in Korea, Republic of. Open to participants aged 27 Years to 82 Years. Per ClinicalTrials.gov, last updated 2013-10-30.

Sponsored by Yonsei University · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
67
Allocation
Randomized
Ages
27 Years to 82 Years
Sex
All
01

Study summary

A few studies have shown that the mini-incision release technique decreases the pathologic swelling of the median nerve at the inlet of the carpal tunnel and increases the flattening ratio of the median nerve in the carpal tunnel. However, it is unknown whether the endoscopic release technique similarly reverses these pathological changes in the median nerve along the carpal tunnel in patients with CTS compared with the mini-incision release.

Investigators therefore conducted the current study to compare the subjective outcomes and US-measured morphological changes in the median nerve in patients with CTS who received either mini-incision or endoscopic release. Investigators hypothesized that (1) subjective outcomes, as assessed by both the Boston Carpal Tunnel Questionnaire (BCTQ) symptom/function scores and the DASH scores, would be similar 24 weeks after either mini-incision or endoscopic carpal tunnel release; (2) changes in the morphology of the median nerve at each level of the carpal tunnel, as measured under high-resolution US, would be similar 24 weeks after either mini-incision or endoscopic carpal tunnel release; and (3) morphological changes would be correlated with improvements in subjective outcomes 24 weeks after mini-incision or endoscopic carpal tunnel release.

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Conditions studied

  • Idiopathic Carpal Tunnel Syndrome

Keywords

  • Carpal tunnel syndrome
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In context

Carpal Tunnel Syndrome

589 studies on the registry are indexed under Carpal Tunnel Syndrome; 140 are open to participants now.

This study's enrollment of 67 is above the median of 60 across 445 interventional studies indexed under Carpal Tunnel Syndrome.

Browse Carpal Tunnel Syndrome studies →

Lead sponsor

Yonsei University is the lead sponsor of 1,387 studies on the registry; 232 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
27 Years to 82 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Patients who are 20 years or older.
  • Patients with idiopathic CTS that was confirmed by electrodiagnostic tests
  • Patients with idiopathic CTS who were scheduled for carpal tunnel release

Exclusion criteria

Exclusion Criteria:

  • Patients with a history of wrist-area fracture or dislocation
  • Patients with previous carpal tunnel release
  • Patients with associated cervical radiculopathy, cubital tunnel syndrome, thoracic outlet syndrome, diabetes mellitus, hypothyroidism, arthritis, or Burger's disease
  • Patients with cognitive impairment that affected the patient's ability to complete the questionnaires
  • Patients with worker's compensation issues
  • Patients with inadequate follow-up (i.e., less than 24 weeks post-operation)
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Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
67 participants (actual)

Study arms

  • Experimental
    Group I

    Mini-incision carpal tunnel release group

    Procedure: Mini-incision carpal tunnel release

  • Active comparator
    Group II

    Endoscopic carpal tunnel release group

    Procedure: Endoscopic carpal tunnel release

Interventions

  • ProcedureMini-incision carpal tunnel release
  • ProcedureEndoscopic carpal tunnel release
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What researchers measure

Primary outcomes

  1. Change of the Boston Carpal Tunnel Questionnaire (BCTQ)

    The BCTQ is a disease-specific status scale that incorporates both a symptom severity scale and a functional scale. The symptom severity scale (BCTQ-S) is comprised of eleven items that address the severity, frequency, and duration of symptoms, whereas the functional status scale (BCTQ-F) is comprised of eight questions that assess the difficulty of performing eight daily tasks. Each question offers five possible responses of increasing severity, which are scored from 1 (none) to 5 (most severe); the mean values of all the items in the BCTQ were calculated.

    Time frame: preoperatively and 24 weeks post-operation

Secondary outcomes

  1. Change of the Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire

    The DASH quantifies general disabilities related to the upper extremity. The questionnaire contains 30 items: 21 questions that assess difficulties with specific tasks, five that evaluate symptoms, and four that evaluate social function, work function, sleep, and confidence. The DASH scores are scaled between 0 and 100 with higher scores representing greater upper extremity disability.

    Time frame: preoperatively and 24 weeks post-operation

Other outcomes

  1. Change of Ultrasonographic median nerve morphology

    For ultrasonography Examination, each patient underwent an ultrasound (US) examination by a radiologist pre-operatively and 24 weeks post-operation using a scanner with a 12/5-MHz linear array transducer (GE Healthcare LOGIQ S6, Milwaukee, WI). During the examination, the patient sat in a comfortable position facing the examiner. The measured forearm rested on the table with the palm supine and the fingers semi-extended in the neutral position 20. The transducer was placed directly on the patient's skin with gel. The median nerve was first imaged in a longitudinal scan with the US transducer placed at the midline between the radius and ulna and the center of the transducer placed at the distal wrist crease to obtain an initial general overview of the median nerve. This overview of the median nerve was then used to help the examiner obtain optimal axial images.

    Time frame: preoperatively and 24 weeks post-operation

07

Study locations

1 site
  • Department of Orthopedic Surgery,Severance Hospital, Yonsei University Health System
    Seoul, 120-752, Korea, Republic of
08

References and documents

Publications

  • Oh WT, Kang HJ, Koh IH, Jang JY, Choi YR. Morphologic change of nerve and symptom relief are similar after mini-incision and endoscopic carpal tunnel release: a randomized trial. BMC Musculoskelet Disord. 2017 Feb 3;18(1):65. doi: 10.1186/s12891-017-1438-z. PubMed 28158978 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 30, 2013, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT01972165
Lead sponsor
Yonsei University
Responsible party
Sponsor
First posted
Oct 30, 2013
Start date
Nov 2011
Primary completion
Jul 2013
Completion
Jul 2013
Last update
Oct 30, 2013

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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