Home Transcutaneous Electrical Acustimulation (TEA)

Phase 2

Recruiting

• Conditions: Irritable Bowel Syndrome With Constipation
• Interventions: Device: TEA; Drug: Lexapro

• Registration Number: NCT05519683
• Lead Sponsor: University of Michigan

Brief Summary

This study will assess the efficacy of two active treatments with TEA and a chemical neuromodulator (escitalopram aka Lexapro) versus a sham comparator or control group on abdominal pain.

Detailed Description

The aim of this study is to investigate the potential of TEA to treat abdominal pain in participants with IBS with constipation (IBS-C). The study also aims to compare the electrical neuromodulation therapy (TEA) with medical neuromodulation therapy (escitalopram) in their ability to treat abdominal pain and improve the autonomic dysfunction in participants with IBS-C. This project will investigate the impact of 3 active treatment interventions vs. a sham control intervention on abdominal pain and other IBS symptoms in participants with IBS-C. This is a parallel-group study in which the participants will be divided into 4 treatment groups designed to investigate the feasibility of TEA using optimized parameters in comparison with medical neuromodulation therapy (escitalopram) and sham-TEA. The treatment will be home-based and last for a period of 8 weeks. To preserve scientific integrity and effective masking, certain details of arms and interventions will be made more precise upon or prior to reporting results

Study Timeline

• Study First Submitted: 2022-08-18
• Study First Submitted QC: 2022-08-24
• Study First Posted: 2022-08-29
• Study Start: 2022-11-02
• Status Verified: 2025-01
• Last Update Submitted: 2025-01-07
• Last Update Posted: 2025-01-09
• Primary Completion: 2025-09
• Study Completion: 2025-09

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 160

Inclusion Criteria

• Those with ongoing and symptomatic Irritable Bowel Syndrome with Constipation (IBS-C)
• Significant mean worst abdominal pain severity (as defined by the study protocol, which will be shared with results reporting) on a Visual Analog Scale (VAS) pain score during the Phase-in period
• Symptoms present at least 1 day/week in the last 3 months with symptom onset at least 6 months prior to the diagnosis.
• Abdominal pain is not adequately relieved at the time of screening and the time of randomization.

Exclusion Criteria

• Unrelated active disorder which may involve abdominal pain, such as inflammatory bowel disease, diabetes or unstable thyroid disease.
• Pregnancy, plans to become pregnant, or lactation. Any potential patient of child-bearing potential will complete a pregnancy test at Visit 1 and if the test is positive that individual will be excluded from future participation.
• Any other condition, which in the opinion of the investigator would impede compliance or hinder the completion of the study
• A history of abdominal surgery (other than cholecystectomy or appendectomy)
• Active use of prucalopride, domperidone, alosetron, tegaserod, warfarin, antipsychotic (e.g., Seroquel, Risperdal), antidiarrheal, or frequent (>2 days/week) use of opioid or antispasmodic medication. Those who frequently use Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) will also be excluded.
• Ongoing use of Selective Serotonin Reuptake Inhibitors (SSRIs), Serotonin and Norepinephrine Reuptake Inhibitors (SNRIs), or any other serotonin-active medications, including tricyclic antidepressants (TCAs). Individuals on chronic SSRI therapy, including escitalopram, at the initial evaluation will not be enrolled in the study.
• Inability to avoid the following medications: tricyclic antidepressants, Monoamine Oxidase (MAO) inhibitors including, intravenous methylene blue, linezolid, and pimozide, as well as triptans, fentanyl, lithium, tramadol, tryptophan, buspirone, amphetamines, and St. John's Wort. - - Participants will be informed that MAO inhibitors cannot be used within 14 days of starting or stopping escitalopram.
• Known hypersensitivity to escitalopram or citalopram including any of the inactive ingredients of these formulations.
• Known allergy to adhesive Electrocardiogram (ECG) electrodes.
• Known angle-closure glaucoma, bipolar disorder, history of seizures or prior suicide attempt or known suicidal thoughts.
• Known QTc prolongation or receiving scheduled therapy with a medication associated with prolongation of QTc (screening to be completed at recruitment as detailed above).

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
TEA at location A	TEA	The TEA device administers a mild electrical shock through the skin, similar to acupuncture. Stimulation will be performed twice daily, morning and evening for 45 minutes for 8 weeks. Location sets are described in the protocol, which will be shared with results reporting but are not provided here to maintain masking and, therefore, to safeguard scientific integrity.
TEA at location B	TEA	The TEA device administers a mild electrical shock through the skin, similar to acupuncture. Stimulation will be performed twice daily, morning and evening for 45 minutes for 8 weeks. Location sets are described in the protocol, which will be shared with results reporting but are not provided here to maintain masking and, therefore, to safeguard scientific integrity.
TEA at location C	TEA	The TEA device administers a mild electrical shock through the skin, similar to acupuncture. Stimulation will be performed twice daily, morning and evening for 45 minutes for 8 weeks. Location sets are described in the protocol, which will be shared with results reporting but are not provided here to maintain masking and, therefore, to safeguard scientific integrity.
Escitalopram treatment	Lexapro	This arm will receive treatment with the chemical neuromodulator escitalopram (Lexapro) at 10 mg once per day for 8 weeks. Lexapro is often used as a standard treatment for IBS.

Primary Outcome Measures

Name	Time	Method
Change in global abdominal pain	Weekly for 14 weeks	Participants will complete a weekly VAS survey to monitor for change in discomfort for the week prior when compared to prior to starting the study. This contains two questions which ask yes/no questions asking about improvement over the prior week, and one question asking for satisfaction of improvement from 0 to 5, 0 being the lowest (not satisfied) and 5 being the highest (very satisfied).; These answers will be compared from week 1 to week 14.
Change in abdominal pain/discomfort via daily Visual Analog Scale (VAS) survey	Daily for 14 weeks	Participants will complete a daily VAS survey to measure daily discomfort. There are four metrics measured in this form, abdominal pain, abdominal bloating, abdominal fullness, and abdominal cramping. These are scored on a line from 0 to 10, with 0 being the lowest (no pain) and 10 being the highest (worst imaginable pain); These scores will be totaled each day and compared from day 0 to day 98, or the end of week 14.

Secondary Outcome Measures

Name	Time	Method
Daily Stool Diary - Change in number of bowel movements	Daily for 14 weeks	The Daily Stool Diary will ask how many bowel movements have occurred in the past 24 hours. This will also ask to indicate the number of spontaneous bowel movements (a bowel movement which occurs without use of rescue medications or maneuvers) and number of complete spontaneous bowel movements (a bowel movement which is associated with a feeling of complete evacuation); The change in the mean daily number of bowel movements will be averaged over 1 week and compared between the phase-in period and the final week of the treatment period.
Daily Stool Diary - Change in Bristol Stool Form Scale (BSFS)	Daily for 14 weeks	The Daily Stool Diary will use the BSFS to evaluate the stool consistency for each of the bowel movements in the past 24 hours. The BSFS is scored from 1 to 7, which are defined as follows: BSFS Type 1: Separate hard lumps, like nuts BSFS Type 2: Sausage-shaped but lumpy BSFS Type 3: Like a sausage but with cracks on its surface BSFS Type 4: Like a sausage or snake, smooth and soft BSFS Type 5: Soft blobs with clear-cut edges BSFS Type 6: Fluffy pieces with ragged edges, a mushy stool BSFS Type 7: watery, no solid pieces, entirely liquid; The change in the mean daily scores for Bristol Stool Form Scale will be averaged over 1 week and compared between the phase-in period and the final week of the treatment period.
Daily Stool Diary - Change sense of urgency	Daily for 14 weeks	The Daily Stool Diary will assess the sense of urgency with the following question: "Have you felt or experienced a sense of urgency today?" which will be answered with a yes or no.; The change in the most frequent daily scores for sense of urgency will be calculated over 1 week and compared between the phase-in period and the final week of the treatment period.
Change in Bowel Habits Per Separate IBS-SSS Survey	Once every 10 days for 14 weeks	This survey (a part of the IBS-SSS which is not factored into the scoring) contains 9 questions asking about bowel habits. This will question the minimum and maximum number of bowel movements per day/week/month, typical location of pain, the effect of IBS pain on work habits.; Responses will be compared from day 10 to day 90
Change in Hospital Anxiety and Depression Scale (HADS) - Anxiety	Weekly for 14 weeks	Determines levels of anxiety that a person is experiencing by asking 7 questions scored from 0-3, with 0 being the lowest (not at all) and 3 being the highest (most of the time). Responses for each category will be totaled and compared against the below ranges.; 0-7 = normal 8-10 = borderline abnormal 11-21 = abnormal; Scores will be compared from week 0 to week 14
Change in Hospital Anxiety and Depression Scale (HADS) - Depression	Weekly for 14 weeks	Determines levels of depression that a person is experiencing by asking 7 questions scored from 0-3, with 0 being the lowest (not at all) and 3 being the highest (most of the time). Responses for each category will be totaled and compared against the below ranges.; 0-7 = normal 8-10 = borderline abnormal 11-21 = abnormal; Scores will be compared from week 0 to week 14
Daily Stool Diary - Change in abdominal bloating	Daily for 14 weeks	The Daily Stool Diary will rate the severity of participants abdominal bloating over past 24 hours on a visual analog scale for bloating (0-10 scale), with 0 being the lowest (no bloating) and 10 being the highest (worst imaginable bloating); The change in the mean daily scores for abdominal bloating will be averaged over 1 week and compared between the phase-in period and the final week of the treatment period.
Change in quality of life via Irritable Bowel Syndrome - Quality of Life (IBS-QOL) survey	Weekly for 14 weeks	A self-report quality-of-life measure specific to Irritable Bowel Syndrome (IBS) that can be used to assess the impact of IBS and its treatment. This survey is 34 questions, all scored from 1 to 5, with 1 being the lowest (not at all) and 5 being the highest (a great deal, or extremely). The individual responses to the 34 items are summed and averaged for a total score.; These answers will be compared from week 0 to week 14
Change in IBS - Symptom Severity Score (IBS-SSS)	Once every 10 days for 14 weeks	A survey designed to record and monitor the severity of IBS. The maximum achievable score was 500. Mild, moderate and severe cases were indicated by scores of 75 to 175, 175 to 300 and \> 300 respectively.; Scores will be compared from day 10 to day 90

Trial Locations

Locations (1)

University of Michigan; 🇺🇸 Ann Arbor, Michigan, United States