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Related Concept Videos

Irritable Bowel Syndrome II: Clinical Features and Diagnostic Evaluation01:30

Irritable Bowel Syndrome II: Clinical Features and Diagnostic Evaluation

Irritable Bowel Syndrome II: Clinical Features and Diagnostic Evaluation
Irritable Bowel Syndrome (IBS) is classified into subtypes based on the predominant bowel habits as determined by the Bristol Stool Form Scale (BSFS). The subtypes are:
Irritable Bowel Syndrome01:23

Irritable Bowel Syndrome

DefinitionIrritable bowel syndrome (IBS) is a functional gastrointestinal disorder characterized by recurrent combinations of abdominal pain, bloating, diarrhea, or constipation.Pathophysiology of irritable bowel syndromeIts pathophysiology is multifactorial, involving disturbances in motility, sensory processing, microbial balance, barrier integrity, and gut–brain communication. These mechanisms interact to produce symptoms that vary across IBS subtypes.Altered Motility PatternsDisordered...
Irritable Bowel Syndrome I: Introduction01:17

Irritable Bowel Syndrome I: Introduction

Irritable Bowel Syndrome (IBS) is characterized by functional disturbances in the gastrointestinal system, presenting a cluster of symptoms without evident structural or biochemical abnormalities. It primarily affects the large intestine and may cause abdominal pain, bloating, excessive gas, diarrhea, constipation, or both.
IBS is a chronic condition that can persist over a long period or recur frequently.
The pathogenesis of IBS involves a complex interplay of the following factors:
Altered...
Irritable Bowel Syndrome III: Medical and Nursing Management01:30

Irritable Bowel Syndrome III: Medical and Nursing Management

Managing Irritable Bowel Syndrome (IBS) involves a multifaceted approach, including lifestyle modifications, dietary changes, and medication.
Chronic Bowel Disorders: Introduction01:17

Chronic Bowel Disorders: Introduction

Chronic bowel diseases are a group of long-term conditions affecting the digestive tract, characterized by inflammation and damage to the gut lining. These conditions primarily include irritable bowel syndrome and inflammatory bowel disease.
Irritable Bowel Syndrome (IBS) is a common disorder affecting the gastrointestinal tract. The distinctive feature is recurrent abdominal pain associated with altered bowel movements, manifesting as constipation, diarrhea, or fluctuating between both. The...
Drugs for Treatment of Diarrhea-Predominant IBS01:17

Drugs for Treatment of Diarrhea-Predominant IBS

Diarrhea-predominant irritable bowel syndrome (IBS-D) is a subtype of IBS characterized primarily by frequent, loose, or watery stools, abdominal pain, and abdominal discomfort. Therapeutic approaches to managing IBS-D include dietary changes, stress management techniques, and pharmaceutical interventions.
Two specific drugs used in the treatment are alosetron (Lotronex) and eluxadoline (Viberzi). Alosetron, a 5-HT3 antagonist, works by slowing the movement of stools in the gut, reducing bowel...

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Related Experiment Video

Updated: May 31, 2026

Perturbations of Circulating miRNAs in Irritable Bowel Syndrome Detected Using a Multiplexed High-throughput Gene Expression Platform
10:37

Perturbations of Circulating miRNAs in Irritable Bowel Syndrome Detected Using a Multiplexed High-throughput Gene Expression Platform

Published on: November 30, 2016

Severity in irritable bowel syndrome: a Rome Foundation Working Team report.

Douglas A Drossman1, L Chang, N Bellamy

  • 1UNC Center for Functional GI and Motility Disorders, Chapel Hill, North Carolina 27599-7080, USA. drossman@med.unc.edu

The American Journal of Gastroenterology
|July 13, 2011
PubMed
Summary

Irritable Bowel Syndrome (IBS) severity is a biopsychosocial construct influenced by symptoms, disability, and perceptions. Understanding IBS severity is crucial for diagnosis and treatment, with subgroups identified as mild, moderate, and severe.

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Area of Science:

  • Gastroenterology
  • Psychosomatic Medicine
  • Clinical Research

Background:

  • Irritable Bowel Syndrome (IBS) severity is clinically recognized but lacks a standardized definition.
  • Limited data exist on IBS severity prevalence, determinants, and impact on health status.
  • The Rome Foundation convened a working team to address these knowledge gaps.

Purpose of the Study:

  • To summarize existing research on IBS severity.
  • To establish a consensus definition of IBS severity.
  • To provide recommendations for clinical and research applications of IBS severity.

Main Methods:

  • A multinational committee conducted a systematic literature review on IBS severity.
  • Three commissioned clinical studies were performed to characterize IBS severity.
  • Expert consensus was developed for definition and recommendations.

Main Results:

  • IBS severity is a biopsychosocial composite including symptoms, disability, and illness perceptions.
  • Physiological factors, particularly central nervous system contributions, influence IBS severity.
  • Severity subgroups (mild ~40%, moderate ~35%, severe ~25%) were identified, impacting quality of life and guiding clinical decisions.

Conclusions:

  • Further research is needed to elucidate factors contributing to IBS severity.
  • Development of a validated patient-reported outcome measure for IBS severity is recommended.