RCT of Gut-directed Hypnotherapy in Ehlers-Danlos Syndromes and Generalized Hypermobility Spectrum Disorders

University Health Network, Toronto

Status: Not yet enrolling

Conditions: Irritable Bowel Syndrome; Ehlers-Danlos Syndrome; Gastrointestinal Dysfunction; Hypermobility Syndrome

Treatments: Other: Standard Medical Therapy; Behavioral: Gut-directed hypnotherapy

Study type: Interventional

Funder types: Other

Identifiers

NCT06325345

22-5277

Details and patient eligibility

About

This randomized, controlled trial (RCT) will evaluate the effectiveness of gut-directed hypnotherapy for management of Irritable Bowel Syndrome (IBS) in individuals diagnosed with Ehlers-Danlos Syndromes or Generalized Hypermobility Spectrum Disorders (G-HSD). Consenting patients recruited from the Toronto General Hospital GoodHope Ehlers-Danlos Syndrome Clinic will be randomly assigned to one of two groups: (1) standard medical therapy or (2) standard medical therapy plus eight sessions of gut-directed hypnotherapy. The main questions this study will answer are:

1. Is gut-directed hypnotherapy an efficacious treatment for IBS symptoms among individuals with EDS or G-HSD?
2. Does gut-directed hypnotherapy improve other gut symptoms, quality of life, visceral sensitivity, and emotional distress?
3. Is the activity of the parasympathetic nervous system (i.e. the body's "rest and digest" system) associated with IBS symptoms or treatment outcomes among individuals with EDS or G-HSD?

All participants will be asked to meet with a gastroenterologist three times as part of the standard medical therapy. At each physician visit, they will undergo electrocardiogram recording and complete self-report measures of gastrointestinal symptoms, quality of life, visceral sensitivity, and emotional distress. Participants randomized to receive gut-directed hypnotherapy will also eight weekly remotely-delivered sessions of gut-directed hypnotherapy delivered by a trained behavioral therapist in between the first and second physician visit. At each session of gut-directed hypnotherapy, a voluntary, pleasant, and dream-like state of deep relaxation will be induced and suggestions made for greater relaxation, abdominal comfort, and normalization of gut function. The first session will also include 30 minutes of education on the nature of the gut-brain axis and hypnotherapy prior to hypnosis.

Researchers will compare study groups to see if participants who engaged in gut-directed hypnotherapy had greater improvement in IBS symptoms, other gastrointestinal symptoms, quality of life, visceral sensitivity, and emotional distress. Exploratory analyses will examine the relationships among heart rate variability, an index of parasympathetic nervous system activity, and study outcomes.

Enrollment: 74 estimated patients

Sex: All

Ages: 18 to 80 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Physician diagnosis of Ehlers-Danlos Syndrome or Generalized Hypermobility Spectrum Disorder
• Physician diagnosis of Irritable Bowel Syndrome according to the Rome IV criteria.
• If receiving pharmacologic therapy for IBS, they must be on a stable dose for 4 weeks prior to study enrollment

Exclusion criteria

• Patients with diagnosed lower bowel disease (e.g. inflammatory bowel disease, celiac's disease)
• Patients with history of major gastrointestinal surgery (except appendectomy and/or cholecystectomy > 6 months prior to enrollment)
• Patients with limited comprehension of English or hearing difficulty who would not be able to understand the verbal instructions for clinical hypnosis
• Patients with a known history of serious mental illness (e.g., schizophrenia, dissociative identity disorder)
• Patients with cognitive deficits whose comprehension may limit benefit
• Patients with heavy alcohol use (> 15 drinks/week for men, > 10 drinks/week for women)

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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74 participants in 2 patient groups

Standard Medical Therapy

Other group

Description:

Standard Medical Treatment will be administered by board certified gastroenterologists through the EDS Clinic gastroenterology clinical care pathway. Therapies will be individualized to the participants' current symptoms and severity of symptoms as per current clinical guidelines for management of IBS. Potential therapies that may be administered include dietary changes, supplemental fibre, and pharmacotherapy (including neuromodulators) as appropriate.

Treatment:

Other: Standard Medical Therapy

Standard Medical Therapy plus Gut-Directed Hypnotherapy

Experimental group

Description:

In addition to Standard Medical Therapy, participants randomized to this arm will attend 8 sessions of gut-directed hypnotherapy by a trained behavioral therapist. The treatment protocol developed for the proposed study was adapted from the empirically-supported Manchester Protocol for gut-directed hypnotherapy. At each visit, a voluntary, pleasant, and dream-like state of deep relaxation will be induced and suggestions made for greater relaxation, abdominal comfort, and normalization of gut function. The first session will be 90 minutes in duration and the remaining sessions will be 60 minutes. At the first session, participants will be provided with 30 minutes of education on the nature of the gut-brain axis and hypnotherapy before they undergo hypnotherapy.

Treatment:

Behavioral: Gut-directed hypnotherapy

Other: Standard Medical Therapy