Carpal tunnel release vs placebo surgery in Finland
Official title: Finnish Carpal Tunnel Study - a Randomised, Placebo-surgery Controlled Trial
Run by Helsinki University Central Hospital · NCT07614425 · Data updated 2026-11-12
In this trial, people with carpal tunnel syndrome are randomly assigned to either standard carpal tunnel surgery or a pretend surgery to see if relief comes from the operation itself or from placebo effects.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years to 75 Years |
| Sex | All |
| Enrollment | 180 (estimated) |
| Sponsor | Helsinki University Central Hospital Academic / other |
| Locations | 2 sites (Helsinki and 1 other locations) |
| Status | Recruiting |
| Started | June 11, 2026 |
| Main results expected | May 30, 2029 |
| Study ends | December 31, 2035 |
| Registry record updated | October 2, 2026 |
| Trial ID | NCT07614425 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults aged 18-75 with clinically and electrodiagnostically confirmed carpal tunnel syndrome who have not responded to conservative treatments and are willing to undergo surgery.
✕Probably not a fit
Patients with comorbid conditions or nerve entrapments other than CTS, or those unlikely to benefit from surgery, may not experience improvement.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This randomized, placebo-controlled trial compares standard carpal tunnel release with a sham procedure where the ligament is not cut. Both patients and care teams are unaware of which procedure was performed. The study also offers an observational group for eligible patients who prefer not to be randomized. Outcomes focus on symptom relief and function to determine the true benefit of the surgical intervention. Participants come from multiple centers in Finland and meet specific clinical and electrodiagnostic criteria.
Why it matters
Potential benefit: If the surgery shows benefit beyond placebo, patients may receive clearer guidance on the value of surgery for CTS.
How similar studies have gone: Previous research in surgical placebos for CTS is limited, making this approach relatively novel for CTS.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Age 18-75 years * Clinical manifestations of carpal tunnel syndrome: paresthesia and /or hypoesthesia in the distribution of the median nerve, possibly pain * Electrodiagnostically (ENMG or ENEG) verified compression of the median nerve at the carpal tunnel in the wrist, performed no more than a year before recruitment. * Duration of symptoms 3 months or longer * Patient living independently * Patient has not responded to the use of a resting splint supporting the wrist, nor to other possible conservative forms of treatment * Patient able and willing to give consent * The patient is willing to undergo surgical treatment for carpal tunnel syndrome. * The patient has access to a device that can be used to complete electronic symptom questionnaires. Exclusion Criteria: * Work disability * Clinical findings of Abductor Pollicis Brevis atrophy * Symptoms and Electrodiagnostic findings of some other peripheral neural entrapment than carpal tunnel syndrome * Rheumatoid arthritis or other forms of systemic inflammatory disease * Diagnosed dementia * Neurologic disorders affecting the function of the hand * Other untreated systemic disorders or diseases with poor therapeutic balance: hypertension, epilepsy, pulmonary or cardiac disease, liver or renal insufficiency, diabetes mellitus, hypothyroidism, psychiatric disease * Other causes of pain and paresthesia in the hand * Previous trauma of the hand or wrist (e.g. distal radius fracture), which has resulted in compromised hand function * Previous carpal tunnel release in either hand * Previous nerve injury to the upper limb or cervical spine
Where it's running
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HUS group, Helsinki Central University Hospital, Meilahti Bridge Hospital
Helsinki, Finland Recruiting -
Wellbeing Services County of Pirkamaa, Tampere Central University Hospital
Tampere, Finland Recruiting
Study contacts
- Study coordinator: Susanna Stjernberg-Salmela, MD, PhD
- Email: Susanna.Stjernberg-Salmela@hus.fi
- Phone: 0504274955
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Matrix Rhythm Therapy for Carpal Tunnel Syndrome
This study tests whether adding Matrix Rhythm Therapy to standard care helps people with mild-to-moderate carpal tunnel syndrome improve symptoms, hand function, grip and pinch strength, and quality of life.
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High-intensity laser therapy for carpal tunnel syndrome
This trial will test whether high-intensity laser therapy helps adults 18–65 with mild-to-moderate carpal tunnel syndrome reduce pain and improve nerve function and hand strength compared with a sham procedure.
-
Ultrasound-guided needle release plus dextrose (D5W) hydrodissection for carpal tunnel syndrome
This trial tests whether combining ultrasound-guided partial release of the transverse carpal ligament with dextrose (D5W) hydrodissection provides better symptom relief for adults with carpal tunnel syndrome and at least moderate symptoms.
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A mix of vitamins to help recovery after carpal tunnel surgery
This will test whether taking alpha-lipoic acid, vitamin E, and B vitamins helps adults recover better after carpal tunnel release surgery.
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Symptom spread and pain sensitivity in carpal tunnel syndrome
This test looks at whether people with carpal tunnel syndrome whose symptoms spread beyond the usual finger area have higher central pain sensitivity, using a questionnaire and pressure pain testing.
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Using ultrasound to improve diagnosis and management of carpal tunnel syndrome
This study is testing if using ultrasound can help doctors diagnose and manage carpal tunnel syndrome better than the usual nerve tests.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.