Understanding the Effects of Transcutaneous Auricular Neurostimulation for Treatment of Chronic Pain

Summary

The purpose of the study is to find out how a stimulation device worn on the ear works. This device is thought to stimulate nerves in the area around the ear to change the signals in the brain. The device has been shown to reduce pain and to reduce the symptoms of withdrawal. The investigator will also investigate changes in the way each participant perceive sensations of pressure and heat. The participant will be asked to reduce the amount of pain medication that they take. Then, the participant will spend several days and nights in the Clinical Research Center at UTMB (University of Texas Medical Branch) in Galveston. During that time, the participant will be monitored for withdrawal symptoms and will receive either active (e.g., "real") brain stimulation or sham (e.g., "fake") brain stimulation for two days (four hours each day). At two times over the course of the study (before and after ear stimulation treatment), the participant will complete questionnaires about their pain score and how they are feeling, sensory testing, and will undergo magnetic resonance imaging (MRI) of their brain. The investigator will collect the following information from the participant's medical record: age, gender, medication history, medical diagnoses, recent vital signs, past doctor visits or hospital stays, and results of urine drug tests. Participation in this study will last approximately four days, and the participant will stay in the Clinical Research Center.

Conditions

• Opioid Withdrawal
• Analgesia

Interventions

DEVICE

transcutaneous Auricular neurostimulation - Active

Active auricular stimulation will be conducted using the FDA-cleared tAN device (Sparrow®) manufactured by Spark Biomedical (Dallas, TX). The tAN devices are portable, wearable systems with two channels of stimulation (auricular vagus and auricular trigeminal). Two individual stimulation frequencies will be set: 15 Hz at cymba concha (Region1/Channel 1; vagal innervation) and 100 Hz adjacently anterior to the tragus (Region 2/Channel 2; trigeminal innervation). The pulse duration will be set at 250 µs for all participants. The stimulation intensities (mA) will be set at 1.0 and 1.4 (for Regions 1 and 2, respectively) based on values observed in previous clinical studies. If the participant states that the stimulation intensity is discomforting or unperceivable, the study personnel will gradually decrease/increase the intensity until a comfortable stimulation intensity is achieved

DEVICE

transcutaneous auricular neurostimulation - Sham

Sham auricular stimulation will be conducted using the FDA-cleared tAN device (Sparrow®) manufactured by Spark Biomedical (Dallas, TX) but will not deliver prolonged stimulation.

Sponsors & Collaborators

• National Institute of Neurological Disorders and Stroke (NINDS)

  collaborator NIH

• Medical University of South Carolina

  collaborator OTHER

• The University of Texas Medical Branch, Galveston

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

QUADRUPLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

65 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2023-05-24

Primary Completion

2027-07-21

Completion

2027-09-30

FDA Device

Yes

Countries

• United States

Study Locations