Functional Gastrointestinal Disorders

Patients with a diagnosed FODMAP intolerance (and a control with no FODMAP intolerance) by prior nutrient challenge testing are going on a FODMAP diet. In a first nutritional visit a specialized nutritionist will inform the patients about FODMAP containing foods and illustrate a FODMAP elimination diet. After 3 weeks of elimination diet another visit will take place and a stepwise reintroduction diet is initiated after successful elimination diet.

FODMAP diet

UniversitätsSpital

Prevalence of FODMAP Intolerance and JHS in FGID and Association With Microbiome, Dyssynergic Defecation and Dietary Intervention

Prevalence of FODMAP Intolerance and Joint Hypermobility Syndrome in Functional Bowel Patients and Association With Microbiome, Dyssynergic Defecation and Dietary Intervention - a Prospective Cohort Study With Health-related Intervention

Prevalence of joint hypermobility resp. hEDS will be assessed by physicians according to the criteria of the "2017 International Classification of the Ehlers-Danlos Syndromes" in patients with disorders of gut-brain interactions (FGID). The assessment consists of some hypermobility testings (wrists, fingers, elbows, knees and legs) and questions about family hypermobility syndrome history, scars healing, hernia history etc.

Prevalence of FODMAP intolerance in FGID patients will be assessed according to nutrient challenge testing (NCT). Patients drink a specific beverage containing a specific sugar. The hydrogen value in breath is then measured every 10 minutes and symptoms are recorded at the same time. Depending on the time of hydrogen production and the increase of abdominal symptoms can a FODMAP intolerance be determined.

FGID patients will be randomized according to the participants JH-status and according to the result of NCT to the dietary intervention. They will follow a specific intervention diet with guidance of a dietician and the abdominal symptoms will be assessed every 4 weeks approximately.

Microbiome changes after dietary intervention will be analyzed.

Prevalence of outlet obstruction in a subgroup of FGID patients (IBS-C) will be analyzed by high resolution anorectal manometry and/or MR defecography

cystocele/nausea

Prevalence of FODMAP Intolerance and JHS in FGID and Association With Microbiome, Dyssynergic Defecation and Dietary Intervention

Gabapentin Reduces Opioid Use Postoperatively ("GROUP Study")

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