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Transcutaneous Auricular Vagus Nerve Stimulation for Poor Weight-Loss Response to Incretin Receptor Agonists
Adjunctive Transcutaneous Auricular Vagus Nerve Stimulation in Overweight or Obese Patients With a Suboptimal Weight-Loss Response to Incretin Receptor Agonists: A Single-Center, Randomized, Sham-Controlled Pilot Study
Asset
Tirzepatide
Subcutaneous · GLP-1 / GIP dual
Listed sites
1
Recruiting sites
1
Enrollment
24
estimated
Study population
Obesity / overweight
Key I/E criterion
—
Primary endpoint
•Body Weight
Footprint
Where this trial recruits
Site locations as reported to ClinicalTrials.gov. Site count is not enrollment count; per-site enrollment is not available from source.
Identifiers
Registered as
Timeline
Milestones
Assets
Investigational agents
Study populations
Who this study enrolls
Eligibility
Who can enroll
Inclusion criteria
1. Individuals with obesity, or overweight accompanied by at least one weight-related comorbidity (e.g., hypertension or fatty liver disease), who have been receiving incretin receptor agonist therapy for at least 6 months and have achieved ≤10% weight loss during treatment;
2. Willingness to provide written informed consent.
Exclusion criteria
1. Presence of diseases that may substantially affect body weight homeostasis, including Cushing's syndrome, uncontrolled thyroid disease (thyroid-stimulating hormone >6.0 mIU/L or <0.4 mIU/L), malignancy, or similar conditions;
2. Use within the past 3 months of medications, other than incretin receptor agonists, that may significantly affect body weight, including glucocorticoids and antipsychotic agents;
3. Skin infection or damage involving the auricular area;
4. Women planning pregnancy in the near future;
5. Contraindications to MRI, such as metallic prostheses or claustrophobia;
6. Diagnosis of diabetes mellitus; Inability to complete the 12-week intervention period for practical reasons, such as frequent business travel or planned travel.
Endpoints (17)
What's being measured
Protocol endpoints and posted registry outcome measures, grouped into outcome categories. Composite endpoints show their component event types. Standard codes (LOINC, SNOMED CT) are shown where available.
Coverage by outcome category
Weight & body composition
4 endpointsPercent Change in Body Weight From Baseline
Time frame:Baseline, 4 weeks, 8 weeks, 12 weeks
percent change from baseline, improvement
Change in Waist Circumference
Time frame:Baseline, Week 4, Week 8, Week 12
change from baseline, improvement
Change in Body Composition and Fat Distribution
Time frame:Baseline, ,Week 4, Week 8, Week 12
change from baseline, improvement
Change in Visceral Fat Area
Time frame:Baseline, Week 4, Week 8, Week 12
change from baseline, improvement
Glycemic / diabetes
2 endpointsChange in blood glucose
Time frame:Baseline, Week 12
change from baseline, improvement
Change in Glycated Hemoglobin
Time frame:Baseline, Week 12
change from baseline, improvement
MASH / liver
1 endpointChange in Liver Stiffness Measurement
Time frame:Baseline, Week 12
change from baseline, improvement
Cardiometabolic biomarkers
4 endpointsChange in High-Density Lipoprotein Cholesterol
Time frame:Baseline, Week 12
change from baseline, improvement
Change in Low-Density Lipoprotein Cholesterol
Time frame:Baseline, Week 12
change from baseline, improvement
Change in Triglycerides
Time frame:Baseline, Week 12
change from baseline, improvement
Change in Heart Rate Variability
Time frame:Baseline, Week 12
change from baseline, improvement
Other (unclassified)
6 endpointsChange in Hip Circumference
Time frame:Baseline, Week 4, Week 8, Week 12
change from baseline, improvement
Change in Controlled Attenuation Parameter
Time frame:Baseline, Week 12
change from baseline, improvement
Change in Liver Function
Time frame:Baseline, Week 12
change from baseline, improvement
Change in Cardiovascular Autonomic Reflex Test Result
Time frame:Baseline, Week 12
change from baseline, improvement
Change in Central Autonomic Network Functional Connectivity
Time frame:Baseline, Week 12
change from baseline, improvement
Change in Brain Biotype
Time frame:Baseline, Week 12
change from baseline, improvement
Provenance
Sources
Trial facts come from public ClinicalTrials.gov records. Endpoint categories are Delfa's classification of those records, not a ClinicalTrials.gov field. All figures reflect the July 1, 2026 snapshot.