ClinicalTrials.gg
CompletedNCT03440255Updated Feb 22, 2018

Transcutaneous Vagus Nerve Stimulation in Private Healthcare Center

An interventional study of Transcutaneous Vagus Nerve Stimulation in Generalized Anxiety Disorder, Chronic Pain and Irritable Bowel Syndrome, sponsored by Kinesis Health Associates. Completed at 1 site in Canada. Open to participants aged 20 Years to 65 Years. Per ClinicalTrials.gov, last updated 2018-02-22.

Sponsored by Kinesis Health Associates · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Registered 7 months after the study started (first participant enrolled Jul 2017, registered Feb 2018).

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Phase
Not applicable
Study type
Interventional
Enrollment
11
Allocation
Not applicable
Ages
20 Years to 65 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-13

Among 50 studies in Generalized Anxiety Disorder with a site in Canada — 7 open to participants now, 11 under way, none of them phase 3. Generalized Anxiety Disorder · Canada.

Enrollment
36th of 45
11 · median 63
Started
2017
with 1 other
No phase
32 of 50
4 open now
Registered
21st of 50
by date

Among the 50 studies in Generalized Anxiety Disorder with a site in Canada, this one is the 36th largest by enrollment of the 45 interventional ones that give a count, is one of 2 that started in 2017, is one of 32 with no phase, and was the 21st registered.

Generalized Anxiety Disorder

518 studies on the registry are indexed under Generalized Anxiety Disorder; 125 are open to participants now.

Browse Generalized Anxiety Disorder studies →

Open to participants now

7 of the 50 studies in Generalized Anxiety Disorder with a site in Canada are open now. Recruiting first, the newest first:

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All 7 open studies →

A study can be open while its sites in Canada have not opened yet or have stopped. Only those recruiting at a site in Canada →

Who these studies take

Of the 86 Generalized Anxiety Disorder studies recruiting now, 32 (37%) set no upper age limit and 52 (60%) stop at 75 or younger; 15 take children under 18; 16 take healthy volunteers.

This study: 20 Years to 65 Years · all sexes · no healthy volunteers.

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02

Study summary

This non-randomized, open-label study has the objective to study the effects and feasibility of Transauricular Vagus Nerve Stimulation (TaVNS) for patients suffering from Generalized Anxiety Disorder (GAD), Chronic Pain (CP) and Irritable Bowel Syndrome (IBS) in a private healthcare centre.

Read the detailed description

The effects of TaVNS on GAD, CP and IBS. Participants were investigated during a 4-week period and a 2-month follow-up. Groups (GAD, CP, IBS) were assessed using questionnaires: Anxiety (Generalized Anxiety Disorder GAD-7); CP (Brief Pain Inventory Short Form Questionnaire) and IBS (Irritable Bowel Syndrome Severity Scoring System). TaVNS was performed using a standard transcutaneous electrical nerve stimulation (TENS) device and ear clip electrodes plugged into the concha area of the left ear. All participants received a bi-weekly 30 minutes stimulation (8 sessions). We defined three different TaVNS parameters for each group in hertz (Hz) and microsecond (µs), (GAD: 20Hz-80µs), (CP: 5Hz-200 µs), (IBS: 3Hz-250µs).

03

Conditions studied

  • Generalized Anxiety Disorder
  • Chronic Pain
  • Irritable Bowel Syndrome

Keywords

  • Transcutaneous Vagus nerve Stimulation
  • Generalized Anxiety Disorder
  • Chronic Pain
  • Irritable Bowel Syndrome
  • Private Practice
04

Who can participate

Ages eligible
20 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Age range 20-65 years old
  2. Patient suffering from either Generalized Anxiety Disorder, Chronic Pain scoring and Irritable Bowel Syndrome from moderate
  3. Patients meet the scoring standard questionnaires: mild to severe
  4. Patient can understand and answer the questions
  5. Patient exhibits symptoms for at least six months

Exclusion criteria

Exclusion Criteria:

  1. Reading difficulties
  2. Diagnosed left ear lesion
  3. Measured blood pressure under 100/60 with or without anti-high blood pressure medicine
  4. Active implant such as cochlear implant
  5. Wounds and skin disease in the left ear
  6. Recent head trauma or concussion
  7. Cardiac pacemaker
  8. Severe alcoholism
  9. Left cervical vagotomy
  10. Cholinergic or B blocking medicine
  11. Recreative drugs
  12. Diagnosed concomitant psychiatric comorbidity
  13. Diagnosed concomitant personal disorders
  14. Diagnosed pregnancy
  15. Diagnosed concomitant severe neurological or medical diseases such as neoplasms in activity, neurodegenerative diseases and chronic infectious diseases uncompensated
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
11 participants (actual)

Study arms

  • Experimental
    Transcutaneous Vagus Nerve Stimulation

    TaVNS 8 sessions, 30 min, 4 weeks GAD: 20 Hertz (Hz) - 80 microseconds (µs) CP: 5Hz-200µs IBS: 3Hz-250µs

    Device: Transcutaneous Vagus Nerve Stimulation

Interventions

  • DeviceTranscutaneous Vagus Nerve Stimulation

    TaVNS will be applied by the TENS 7000 device. The stimulation was set according the group of treatment: (GAD: 20Hz-80µs), (CP: 5Hz-200 µs), (IBS: 3Hz-250µs). The current intensity was individually established under the pain threshold .The stimulus generates an continous asymmetric biphasic waveform. Ear clip electrodes were plugged in the concha area of the left ear. The stimulation will last 30 min per session (total=8)

06

What researchers measure

Primary outcomes

  1. Change from baseline generalized anxiety disorder severity

    To assess the response effect of the TaVNS on the severity of anxiety disorders measured by the 21 items self-administered Generalized Anxiety Disorder GAD-7 questionnaire, where scoring scores of 5, 10 and 15 represent cut-off points for mild, moderate and severe anxiety. A response will be considered as a reduced cut-off point from baseline.

    Time frame: baseline, 4-week and 2-month follow-up

  2. Change from baseline pain severity and pain interference

    To assess the response effect of the TaVNS on the severity of pain and the impact of this pain on daily functioning (Interference) measured by the 9 items self-administered Brief Pain Inventory (Short Form) questionnaire; from 0 (no pain) to 10 (worst pain), ratings from 1 to 4 corresponded to mild pain, 5 to 6 to moderate pain, and 7 to 10 to severe pain with cut-off points being 4 and 6. Scoring pain severity is the mean of the total pain score out of 10. Interference from 0 (no interference) to 10 (completely interferes), rating mild (\<=5), moderate (6-7), and severe (\>= 8) with cut-off points being 5 and 7. Scoring the interference severity is the mean of the total Interference score out of 10. A response will be considered as a reduced cut-off point from baseline.

    Time frame: baseline, 4-week and 2-month follow-up

  3. Change from baseline irritable bowels syndrome severity

    To assess the response effect of the TaVNS on the severity of irritable bowel syndrome measured by the self-administered Irritable Bowel Syndrome Severity Scoring System (IBS-SSS), where the maximum achievable score is 500. Mild, moderate and severe categories were indicated by scores of 75 to 175, 175 to 300 and \> 300 respectively, with cut-off points being 175 and 300. A response will be considered as a reduced cut-off point from baseline.

    Time frame: baseline, 4-week and 2-month follow-up

07

Study locations

1 site
  • Kinesis Health Associates
    Dartmouth, Nova Scotia B2Y 1C9, Canada
08

References and documents

Publications

  • Salim S, Chugh G, Asghar M. Inflammation in anxiety. Adv Protein Chem Struct Biol. 2012;88:1-25. doi: 10.1016/B978-0-12-398314-5.00001-5. PubMed 22814704 ↗
  • Bonaz B, Picq C, Sinniger V, Mayol JF, Clarencon D. Vagus nerve stimulation: from epilepsy to the cholinergic anti-inflammatory pathway. Neurogastroenterol Motil. 2013 Mar;25(3):208-21. doi: 10.1111/nmo.12076. Epub 2013 Jan 29. PubMed 23360102 ↗
  • Nagarajan L, Walsh P, Gregory P, Lee M. VNS therapy in clinical practice in children with refractory epilepsy. Acta Neurol Scand. 2002 Jan;105(1):13-7. doi: 10.1034/j.1600-0404.2002.00129.x. PubMed 11903103 ↗
  • Trevizol AP, Taiar I, Barros MD, Liquidatto B, Cordeiro Q, Shiozawa P. Transcutaneous vagus nerve stimulation (tVNS) protocol for the treatment of major depressive disorder: A case study assessing the auricular branch of the vagus nerve. Epilepsy Behav. 2015 Dec;53:166-7. doi: 10.1016/j.yebeh.2015.10.002. Epub 2015 Nov 12. No abstract available. PubMed 26580212 ↗
  • Napadow V, Edwards RR, Cahalan CM, Mensing G, Greenbaum S, Valovska A, Li A, Kim J, Maeda Y, Park K, Wasan AD. Evoked pain analgesia in chronic pelvic pain patients using respiratory-gated auricular vagal afferent nerve stimulation. Pain Med. 2012 Jun;13(6):777-89. doi: 10.1111/j.1526-4637.2012.01385.x. Epub 2012 May 8. PubMed 22568773 ↗
  • Bonaz B, Sinniger V, Pellissier S. The Vagus Nerve in the Neuro-Immune Axis: Implications in the Pathology of the Gastrointestinal Tract. Front Immunol. 2017 Nov 2;8:1452. doi: 10.3389/fimmu.2017.01452. eCollection 2017. PubMed 29163522 ↗
  • George MS, Ward HE Jr, Ninan PT, Pollack M, Nahas Z, Anderson B, Kose S, Howland RH, Goodman WK, Ballenger JC. A pilot study of vagus nerve stimulation (VNS) for treatment-resistant anxiety disorders. Brain Stimul. 2008 Apr;1(2):112-21. doi: 10.1016/j.brs.2008.02.001. Epub 2008 Mar 28. PubMed 20633378 ↗

Individual participant data

Plan to share: Undecided

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Jul 2017 to primary completion in Jul 2017, 0 months.

Of 174 non-industry interventional studies with no phase under Generalized Anxiety Disorder, half reached primary completion within 29 months of starting (the median), counting those still running; a quarter within 16 and three quarters within 55. This study's 0 months is below that.

Counting every sponsor, half of 183 studies reached it within 28 months; a quarter within 15 and three quarters within 53.

How these figures are worked out, and which studies are left out of them.

Registered
Feb 1, 2018
First posted
Feb 22, 2018
StartActual
Jul 1, 2017
Primary completionActual
Jul 31, 2017
CompletionActual
Sep 15, 2017
Last update
Feb 22, 2018
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Feb 22, 2018, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03440255
Lead sponsor
Kinesis Health Associates
Responsible party
Pascal J.D. Grolaux, DO (Principal Investigator, Kinesis Health Associates) — Principal investigator
First posted
Feb 22, 2018
Start date
Jul 1, 2017
Primary completion
Jul 31, 2017
Completion
Sep 15, 2017
Last update
Feb 22, 2018

Study contacts

Pascal JD Grolaux, DO
principal investigator

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Feb 2018. You cannot join it, but the record below documents what was studied.

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