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Carpal Tunnel SyndromePERSONNELNCT05372393

Carpal Tunnel Release Under Local Anaesthesia With or Without Distal Median Nerve Block

A study testing Local infiltration anaesthesia in carpal tunnel release and Distal median nerve block with local infiltration anaesthesia in carpal tunnel release in people with Carpal Tunnel Syndrome, run by Kuopio University Hospital at 1 site in Finland.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
Search all trials

Trial summary

Carpal tunnel syndrome (CTS) is the most commonly appearing entrapment neuropathy of the upper extremity. Treatment options include both non-operative and operative methods. Surgical treatment, carpal tunnel release (CTR), involves division of the transverse carpal ligament. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Carpal Tunnel Syndrome
What is being tested?
Local infiltration anaesthesia in carpal tunnel release and Distal median nerve block with local infiltration anaesthesia in carpal tunnel release
Could I receive a placebo?
No, everyone receives an active treatment
How many people
118 participants
Where
1 siteFinland
Study dates
21 Sep 2022to Apr 2026
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • ≥18 years of age
  • CTS verified by nerve conduction studies
  • Symptoms suitable for CTS

Who cannot join

  • Recurrent CTS
  • Peripheral neuropathies
  • Known allergy to the trial drugs
  • Profound cognitive impairment
  • Pregnancy

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Noora Heikkinen, MBBS contact

+358504421930

noorheik@student.uef.fi

Yrjänä Nietosvaara, Prof. contact

+358447176883

yrjana.nietosvaara@pshyvinvointialue.fi

Finland1 site, 1 recruiting
  • Kuopio University hospital, Department of Orthopaedics, Traumatology and Hand Surgery

    Kuopio, Northern Savonia, 70210

    Yrjänä Nietosvaara, Prof., +358447176883, yrjana.nietosvaara@pshyvinvointialue.fi

    Noora Heikkinen

    Recruiting

Other trials in Finland

About this study

Official title: Carpal Tunnel Release Under Local Anaesthesia With or Without Distal Median Nerve Block - a Protocol of a Double Blinded Randomised Controlled Trial

Carpal tunnel syndrome (CTS) is the most commonly appearing entrapment neuropathy of the upper extremity. Treatment options include both non-operative and operative methods. Surgical treatment, carpal tunnel release (CTR), involves division of the transverse carpal ligament. Surgery can be performed under axillary or intravenous block, or general anaesthesia. There are no prior randomised controlled trials (RCT) comparing local infiltration anaesthesia to local infiltration anaesthesia augmented with a distal median nerve block in CTR.

The aim of this trial is to investigate whether adding a distal median nerve block to local anaesthesia reduces the patient's perceived pain level for up to 72 hours after CTR, compared to using only local anaesthesia, i.e., an anaesthesia mixture injected solely in and around the planned incision and nerve release. The null hypothesis is that the use of distal median nerve block with local anaesthesia does not reduce pain after CTR compared to pure local anaesthesia.

Read more

PERSONNEL (carPal tunnEl ReleaSe lOcal iNfiltratioN mEdian bLockade) is a double-blinded, i.e., patient and investigators, RCT in patients with CTS. Patients will be randomly divided into two parallel trial groups, 1:1 in size to each other. Fifty-nine patients will be needed for each group to have adequate power. The primary outcome is the pain level perceived by the patient after the procedure during the first 72 hours using the Visual Analogue Scale (VAS). Secondary outcomes include patient-rated outcome measures, safety, the entire consumption of pain killers after the surgery during the first 72 hours postoperatively, pain of performing the anaesthesia, and pain during and after the operation.

No trial comparing local anaesthesia to local anaesthesia augmented with distal median nerve block has been published before. There is also no trial noting individual tolerance to pain. The quality of the median nerve block at the wrist has been achieved by using sensory or sensory-motor nerve stimulation and has been proven effective. This increases trust in the effectiveness of the treatment method, but it still needs to be adequately proven which is the goal of this trial.

Being tested
Local infiltration anaesthesia in carpal tunnel release, Distal median nerve block with local infiltration anaesthesia in carpal tunnel release
Keywords
carpal tunnel syndrome, carpal tunnel release, local anaesthesia, surgery, wide-awake local anaesthesia with no tourniquet, nerve block
Medical subject headings
Carpal Tunnel Syndrome

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Local infiltration anaesthesia in carpal tunnel releaseProcedure or surgery

    The anaesthetic cocktail consists of 1 ml of (7.5%) sodium bicarbonate (Natriumbicarbonate Braun 75mg/ml), 4,5 ml of lidocaine with adrenaline 1% (Lidocain cum adrenalin 10 mg/ml), 4,5 ml of bupivacaine with adrenaline 0.5% (Marcain cum adrenalin 5mg/ml +5 µg/ml). The anaesthetic cocktail must be prepared in the above-mentioned order to avoid possible precipitation. A 24-gauge hypodermic needle and 10 ml syringe are used to inject the solution. The care provider pinches from the area of median nerve blockade prior to performing local anaesthesia. All the anaesthetic solution is injected locally. Additional anaesthetic solution can be injected locally if necessary.

  • Distal median nerve block with local infiltration anaesthesia in carpal tunnel releaseProcedure or surgery

    The anaesthetic cocktail consists of 1 ml of (7.5%) sodium bicarbonate (Natriumbicarbonate Braun 75mg/ml), 4,5 ml of lidocaine with adrenaline 1% (Lidocain cum adrenalin 10 mg/ml), 4,5 ml of bupivacaine with adrenaline 0.5% (Marcain cum adrenalin 5mg/ml +5 µg/ml). The anaesthetic cocktail must be prepared in the above-mentioned order to avoid possible precipitation. A 24-gauge hypodermic needle and 10 ml syringe are used to inject the solution. Half of the anaesthetic solution is injected into the median nerve area 5-7 cm proximally from the distal wrist crease. The other half is injected locally. Additional anaesthetic solution can be injected locally if necessary.

Study groups in NCT05372393
Study groupRoleWhat they receive
Local infiltration anaesthesia in carpal tunnel releaseActive comparatorThe investigators allocate 59 patients in this arm. It serves as the control group, who receives local infiltration anaesthesia.
Receives: Procedure: Local infiltration anaesthesia in carpal tunnel release
Distal median nerve block with local infiltration anaesthesia in carpal tunnel releaseExperimentalThe investigators allocate 59 patients in this arm. It serves as the experimental group, who receives local infiltration anaesthesia and distal median nerve block.
Receives: Procedure: Distal median nerve block with local infiltration anaesthesia in carpal tunnel release

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. The pain level perceived by the patient after the procedure using Visual Analogue Scale (VAS)

    The investigators measure the pain level perceived by the patient after the procedure every fourth hour while awake until third night postoperatively using VAS. The first assessment is performed four hours after the surgery. The mean VAS is calculated from all time points over the 72-hour period. The Visual analogue Scale for pain is a straight line with one end meaning no pain and the other end meaning the worst pain imaginable.

    Measured: Postoperatively during the first 72 hours after the operation

Secondary outcomes (12)
  1. Pressure pain (VAS)

    The investigators ask the patients to evaluate the pressure pain that the infiltration of the anaesthetic solution caused using Visual Analogue Scale (VAS). The Visual Analogue Scale for pain is a straight line with one end meaning no pain and the other end meaning the worst pain imaginable.

    Measured: Immediately after the infiltration of anaesthetic solution

  2. Burning pain (VAS)

    The investigators ask the patients to evaluate the burning pain that the infiltration of the anaesthetic solution caused using Visual Analogue Scale (VAS). The Visual Analogue Scale for pain is a straight line with one end meaning no pain and the other end meaning the worst pain imaginable.

    Measured: Immediately after the infiltration of anaesthetic solution

  3. Needle sting pain (VAS)

    The investigators ask the patients to evaluate the needle sting pain that the infiltration of the anaesthetic solution caused using Visual Analogue Scale (VAS). The Visual Analogue Scale for pain is a straight line with one end meaning no pain and the other end meaning the worst pain imaginable.

    Measured: Immediately after the infiltration of anaesthetic solution

  4. Total pain during the injection of the anaesthetic solution (VAS)

    The investigators ask the patients to evaluate the total pain that the infiltration of the anaesthetic solution caused using Visual Analogue Scale (VAS). The Visual Analogue Scale for pain is a straight line with one end meaning no pain and the other end meaning the worst pain imaginable.

    Measured: Immediately after the infiltration of anaesthetic solution

  5. Worst pain during the operation (VAS)

    The investigators ask the patients to evaluate the worst pain during the operation using Visual Analogue Scale (VAS). The Visual Analogue Scale for pain is a straight line with one end meaning no pain and the other end meaning the worst pain imaginable.

    Measured: Immediately after the operation

  6. Duration of anaesthesia

    The investigators assess the length of the anaesthesia by asking the patients to fill an online form when they first time feel pain in the operation field or have to use pain killers.

    Measured: Postoperatively during the first 72 hours after the operation

  7. Self-reported symptom severity and functional status

    The investigators ask the patients to evaluate their symptoms using Boston Carpal Tunnel Syndrome Questionnaire (BCTQ) score. It consists of the Symptom Severity Scale (SSS) containing 11 questions, and it uses a five-point Likert rating scale from 1 (no symptoms) to 5 (most severe symptoms), and Functional Status Scale (FSS), which has 8 questions assessing the degree of complaints on a five-point Likert scale from 1 (no symptoms) to 5 (most severe symptoms). Mean sum scores of both scales are calculated and used for analysis.

    Measured: Before and 3 months postoperatively

  8. Patient satisfaction

    Patients evaluate how likely they would recommend the procedure to a fellow man using Net Promoter Score (NPS). Net Promoter Score is a measurement taken from asking patients how likely they are to recommend the procedure to others on a scale of 0-10. The higher score the better outcome.

    Measured: 3 months postoperatively

  9. Adverse events (AE)

    Health care professional assessment

    Measured: 3 months postoperatively

  10. Expected pain (VAS)

    The investigators ask the patient to evaluate the pain during the infiltration of the anaestetic solution using Visual Analogue Scale (VAS). The Visual Analogue Scale for pain is a straight line with one end meaning no pain and the other end meaning the worst pain imaginable.

    Measured: Before the infiltration of the anaesthetic solution

  11. Amount of perceived needle stings

    The investigators ask the patient to report how many needle stings they felt when the anaesthesia was performed.

    Measured: Immediately after the infiltration of anaesthetic solution

  12. Consumption of pain killers

    The investigators record the consumption of pain killers after surgery

    Measured: Postoperatively during the first 72 hours after the operation

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted12 May 2022
  2. Study start21 Sep 2022
  3. Primary completionDec 2025 (estimated)
  4. Study completionApr 2026 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Model description
Two concurrent study groups
Masking
Double blind
Who is masked
Participant, Investigator
Enrolment
118 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05372393
Sponsor's protocol ID
KUH5203140
Acronym
PERSONNEL
Status last verified
Sep 2025
First submitted
9 May 2022
Last updated
19 Sep 2025
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: This trial will share data with researchers who submit a methodologically sound proposal after its completion, as well as with reviewers of the journal where the trial results will be published, if necessary.

Publications

  • Shi Q, MacDermid JC. Is surgical intervention more effective than non-surgical treatment for carpal tunnel syndrome? A systematic review. J Orthop Surg Res. 2011 Apr 11;6:17. doi: 10.1186/1749-799X-6-17.

    PubMed 21477381
  • Piazzini DB, Aprile I, Ferrara PE, Bertolini C, Tonali P, Maggi L, Rabini A, Piantelli S, Padua L. A systematic review of conservative treatment of carpal tunnel syndrome. Clin Rehabil. 2007 Apr;21(4):299-314. doi: 10.1177/0269215507077294.

    PubMed 17613571
  • Keir PJ, Rempel DM. Pathomechanics of peripheral nerve loading. Evidence in carpal tunnel syndrome. J Hand Ther. 2005 Apr-Jun;18(2):259-69. doi: 10.1197/j.jht.2005.02.001.

    PubMed 15891983
  • Kozak A, Schedlbauer G, Wirth T, Euler U, Westermann C, Nienhaus A. Association between work-related biomechanical risk factors and the occurrence of carpal tunnel syndrome: an overview of systematic reviews and a meta-analysis of current research. BMC Musculoskelet Disord. 2015 Sep 1;16:231. doi: 10.1186/s12891-015-0685-0.

    PubMed 26323649
  • Padua L, Di Pasquale A, Pazzaglia C, Liotta GA, Librante A, Mondelli M. Systematic review of pregnancy-related carpal tunnel syndrome. Muscle Nerve. 2010 Nov;42(5):697-702. doi: 10.1002/mus.21910.

    PubMed 20976778
  • Mondelli M, Giannini F, Giacchi M. Carpal tunnel syndrome incidence in a general population. Neurology. 2002 Jan 22;58(2):289-94. doi: 10.1212/wnl.58.2.289.

    PubMed 11805259
  • Shiri R, Pourmemari MH, Falah-Hassani K, Viikari-Juntura E. The effect of excess body mass on the risk of carpal tunnel syndrome: a meta-analysis of 58 studies. Obes Rev. 2015 Dec;16(12):1094-104. doi: 10.1111/obr.12324. Epub 2015 Sep 23.

    PubMed 26395787
  • Shiri R. Hypothyroidism and carpal tunnel syndrome: a meta-analysis. Muscle Nerve. 2014 Dec;50(6):879-83. doi: 10.1002/mus.24453. Epub 2014 Oct 30.

    PubMed 25204641
  • Pourmemari MH, Shiri R. Diabetes as a risk factor for carpal tunnel syndrome: a systematic review and meta-analysis. Diabet Med. 2016 Jan;33(1):10-6. doi: 10.1111/dme.12855. Epub 2015 Aug 18.

    PubMed 26173490
  • Chammas M, Boretto J, Burmann LM, Ramos RM, Dos Santos Neto FC, Silva JB. Carpal tunnel syndrome - Part I (anatomy, physiology, etiology and diagnosis). Rev Bras Ortop. 2014 Aug 20;49(5):429-36. doi: 10.1016/j.rboe.2014.08.001. eCollection 2014 Sep-Oct.

    PubMed 26229841
  • Genova A, Dix O, Saefan A, Thakur M, Hassan A. Carpal Tunnel Syndrome: A Review of Literature. Cureus. 2020 Mar 19;12(3):e7333. doi: 10.7759/cureus.7333.

    PubMed 32313774
  • Kim PT, Lee HJ, Kim TG, Jeon IH. Current approaches for carpal tunnel syndrome. Clin Orthop Surg. 2014 Sep;6(3):253-7. doi: 10.4055/cios.2014.6.3.253. Epub 2014 Aug 5.

    PubMed 25177448
  • Wang L. Guiding Treatment for Carpal Tunnel Syndrome. Phys Med Rehabil Clin N Am. 2018 Nov;29(4):751-760. doi: 10.1016/j.pmr.2018.06.009. Epub 2018 Sep 17.

    PubMed 30293628
  • Padua L, Coraci D, Erra C, Pazzaglia C, Paolasso I, Loreti C, Caliandro P, Hobson-Webb LD. Carpal tunnel syndrome: clinical features, diagnosis, and management. Lancet Neurol. 2016 Nov;15(12):1273-1284. doi: 10.1016/S1474-4422(16)30231-9. Epub 2016 Oct 11.

    PubMed 27751557
  • Wipperman J, Goerl K. Carpal Tunnel Syndrome: Diagnosis and Management. Am Fam Physician. 2016 Dec 15;94(12):993-999.

    PubMed 28075090

Questions about this trial

What is this clinical trial studying?

A study testing Local infiltration anaesthesia in carpal tunnel release and Distal median nerve block with local infiltration anaesthesia in carpal tunnel release in people with Carpal Tunnel Syndrome, run by Kuopio University Hospital at 1 site in Finland.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 3 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 19 Sep 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Finland. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Noora Heikkinen, MBBS (+358504421930, noorheik@student.uef.fi), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

The pain level perceived by the patient after the procedure using Visual Analogue Scale (VAS) (time frame: Postoperatively during the first 72 hours after the operation). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT05372393, which also lists 25 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 19 Sep 2025.

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