Ignite Creation Date:
2024-10-26 @ 3:41 PM
Last Modification Date:
2024-10-26 @ 3:41 PM
Study NCT ID:
NCT06615856
Status:
NOT_YET_RECRUITING
Last Update Posted:
None
First Post:
2024-09-24
Brief Title:
The Influence of Concomitant Irritable Bowel Syndrome on Gastro-Oesophageal Reflux Disease Symptoms and Severity
Sponsor:
None
Organization:
None
Study Overview
Official Title:
Understanding the Influence of Concomitant Irritable Bowel Syndrome IBS on Gastro-Oesophageal Reflux Disease GORD Including GORD-related Symptoms GORD Severity Oesophageal Motility and Multi-Channel Intraluminal Impedance-pH Findings
Status:
NOT_YET_RECRUITING
Status Verified Date:
2024-09
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
No
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
This research aims to investigate whether there is a link between irritable bowel syndrome IBS and acid reflux particularly whether there is a difference in acid reflux symptoms between people with and without IBS
IBS is a functional gastrointestinal disorder which has the same root cause as other functional gastrointestinal disorders that produce symptoms similar to acid reflux Acid reflux symptoms may be typical heartburn regurgitation or atypical cough sore throat chest pain
All participants are given two questionnaires one to categorise them as either IBS or non-IBS and one to understand their acid reflux symptoms From this the project will investigate whether there is a difference in the type typicalatypical and severity of acid reflux symptoms between people with and without IBS that attend for diagnostic acid reflux testing at Leeds Teaching Hospitals
Two factors determine how much acid reflux someone has the ability of the oesophagus food- pipe to move food from the throat to the stomach and how well the muscle between the oesophagus and stomach works to keep acidic contents from moving back up
All participants will have a test to see how well the muscles in their oesophagus are working As there may be a link between IBS and oesophageal function this project will investigate whether any patterns of abnormal oesophageal function can be identified in IBS patients that might explain their acid reflux symptoms
Participants will then have a test that measures acid reflux over 24 hours including the amount of acid and non-acid coming up how high this reaches in the oesophagus and whether symptoms are linked to these events
Analysing these test results against questionnaire answers might help to understand the link between IBS and acid reflux to improve future diagnosis and treatment for the many people that have these conditions
IBS is a functional gastrointestinal disorder which has the same root cause as other functional gastrointestinal disorders that produce symptoms similar to acid reflux Acid reflux symptoms may be typical heartburn regurgitation or atypical cough sore throat chest pain
All participants are given two questionnaires one to categorise them as either IBS or non-IBS and one to understand their acid reflux symptoms From this the project will investigate whether there is a difference in the type typicalatypical and severity of acid reflux symptoms between people with and without IBS that attend for diagnostic acid reflux testing at Leeds Teaching Hospitals
Two factors determine how much acid reflux someone has the ability of the oesophagus food- pipe to move food from the throat to the stomach and how well the muscle between the oesophagus and stomach works to keep acidic contents from moving back up
All participants will have a test to see how well the muscles in their oesophagus are working As there may be a link between IBS and oesophageal function this project will investigate whether any patterns of abnormal oesophageal function can be identified in IBS patients that might explain their acid reflux symptoms
Participants will then have a test that measures acid reflux over 24 hours including the amount of acid and non-acid coming up how high this reaches in the oesophagus and whether symptoms are linked to these events
Analysing these test results against questionnaire answers might help to understand the link between IBS and acid reflux to improve future diagnosis and treatment for the many people that have these conditions
Detailed Description:
Functional gastrointestinal disorders FGIDs are characterised by chronic gastrointestinal symptoms in the absence of demonstrable pathology diagnosed using the Rome-IV criteria IBS is the most prevalent FGID affecting gt12 UK population accounting for 40-60 gastroenterology outpatient referrals It is characterised by abdominal pain bloating and altered stool form or frequency and is classified into four subtypes IBS with predominant constipation predominant diarrhoea mixed bowel habits or unsubtyped
Whilst IBS pathogenesis is not wholly understood it is considered attributable to visceral hypersensitivity VH disordered microbiota-brain-gut axis communication gastrointestinal infection and brain function changes VH is an altered sensation response to physiological stimuli which may occur from nervous system disturbances Non-pathological visceral functions should not result in pain yet the disordered response to physiological stimuli with VH causes an enhanced perception of mechanical triggers applied to the bowel inducing perceived discomfort
Oesophageal FGIDs with similar VH-mediated pathogenesis include functional heartburn FH reflux hypersensitivity RH functional chest pain and globus These can produce symptoms that are phenotypically indistinguishable from gastro-oesophageal reflux disease GORD yet exhibit no measurable cause
GORD results from retrograde movement of acidic gastric contents into the oesophagus characterised by excessive oesophageal acid exposure OAE Protective physiological mechanisms minimise gastro-oesophageal reflux namely the anti-reflux barrier comprising the lower oesophageal sphincter LOS crural diaphragm and supporting structures along with peristaltic clearance of refluxate from the oesophagus However compromise of these mechanisms may cause gastro-oesophageal reflux to increase to pathological levels of OAE resulting in oesophagitis and symptom generation
Ambulatory pH-monitoring directly confirms or refutes GORD diagnoses by measuring OAE and reflux episode frequency over 24-hours GORD can be classified as erosive reflux disease ERD diagnosed endoscopically by erosive oesophagitis or Barretts oesophagus or non-erosive reflux disease NERD which presents with no mucosal damage
GORD can manifest diversely with either typical or atypical symptoms Typical symptoms include heartburn and acid regurgitation whilst atypical manifestations include chest pain chronic cough belching dyspepsia globus and more Some studies have demonstrated that symptom presentation varies between ERD and NERD with atypical symptoms presenting exceedingly in ERD and typical manifestations more frequent with concurrent atypical symptoms
NERD patients often report comparable symptom severity to ERD patients despite typically conferring lower OAE suggesting that clinically-relevant NERD may be concomitant with FGIDs or attributable to VH Mechanoreceptor hypersensitivity may contribute to symptom perception as one study found that those with NERD FH and RH exhibited increased sensitivity to oesophageal balloon distension compared to controls and ERD patients From this it is hypothesised that predisposition to FGIDs may impact experienced GORD symptoms regardless of OAE
Previous studies have found significant overlap in the prevalence of GORD and IBS suggesting shared underlying dysfunction Furthermore GORD concomitant with IBS has been found to present with exceedingly frequent atypical symptoms than GORD alone however only a minority of symptoms were investigated many of which may be specific to IBS Additionally males with IBS have been found to experience significantly greater reflux symptoms than controls despite no GORD diagnoses highlighting the potential influence of IBS on perceived symptoms Moreover IBS has been shown not to affect OAE yet was associated with significantly higher GORD symptom scores with influence comparable to OAE
Whilst these studies demonstrate an association between IBS and GORD symptoms the criteria that were used to diagnose IBS are outdated and oversimple failing to distinguish between IBS subtypes Furthermore as the pH studies used measured only OAE to diagnose GORD these are too simplistic to assess the potential influence of oesophageal FGIDs and non-acidic reflux on symptoms
Improved understanding of the link between these conditions may enhance diagnosis and treatment for the abundance of people with both GORD and IBS Therefore this research primarily aims to investigate whether GORD concomitant with IBS manifests a particular presentation of symptoms whether concomitance with IBS may influence GORD severity using multichannel intraluminal impedance-pH monitoring MII-pH and whether this differs between IBS subtypes
MII-pH is the gold-standard for diagnosing GORD as it assesses weakly-acidic and non-acidic reflux proximal extension and baseline impedance along with standard pH findings It is essential for distinguishing NERD RH and FH by classification of acid exposure time non-acid reflux and symptom association Baseline impedance may also distinguish GORD and FH as GORD has been shown to exhibit a lower baseline impedance due to reduced mucosal integrity Furthermore proximal reflux extension has been shown to correlate with atypical symptoms such as chronic cough and is higher in those with NERD than RH therefore is valuable for understanding symptom changes and distinguishing conditions These previous findings necessitate the use of MII-pH in this project to wholly interpret any identifiable association between IBS and specific symptoms by assessing the potential for a shared functional cause of IBS and oesophageal FGIDs Therefore this research further aims to investigate whether MII-pH parameters differ between IBS and non-IBS patients
Additionally a vague association has been identified between IBS and oesophageal motility which may indicate that influence of IBS on GORD symptoms relates to smooth muscle dysfunction rather than functional causes One study identified pathologically altered oesophageal motility patterns in IBS while others found significantly lower LOS pressures which may explain the overlap with upper gastrointestinal conditions However the significance of these findings in relation to the effect on GORD symptoms is unclear particularly with the use of outdated conventional manometry to assess motility patterns and small sample sizes Therefore this project secondarily aims to investigate whether oesophageal motility patterns differ between IBS and non- IBS patients using high-resolution oesophageal manometry
Whilst IBS pathogenesis is not wholly understood it is considered attributable to visceral hypersensitivity VH disordered microbiota-brain-gut axis communication gastrointestinal infection and brain function changes VH is an altered sensation response to physiological stimuli which may occur from nervous system disturbances Non-pathological visceral functions should not result in pain yet the disordered response to physiological stimuli with VH causes an enhanced perception of mechanical triggers applied to the bowel inducing perceived discomfort
Oesophageal FGIDs with similar VH-mediated pathogenesis include functional heartburn FH reflux hypersensitivity RH functional chest pain and globus These can produce symptoms that are phenotypically indistinguishable from gastro-oesophageal reflux disease GORD yet exhibit no measurable cause
GORD results from retrograde movement of acidic gastric contents into the oesophagus characterised by excessive oesophageal acid exposure OAE Protective physiological mechanisms minimise gastro-oesophageal reflux namely the anti-reflux barrier comprising the lower oesophageal sphincter LOS crural diaphragm and supporting structures along with peristaltic clearance of refluxate from the oesophagus However compromise of these mechanisms may cause gastro-oesophageal reflux to increase to pathological levels of OAE resulting in oesophagitis and symptom generation
Ambulatory pH-monitoring directly confirms or refutes GORD diagnoses by measuring OAE and reflux episode frequency over 24-hours GORD can be classified as erosive reflux disease ERD diagnosed endoscopically by erosive oesophagitis or Barretts oesophagus or non-erosive reflux disease NERD which presents with no mucosal damage
GORD can manifest diversely with either typical or atypical symptoms Typical symptoms include heartburn and acid regurgitation whilst atypical manifestations include chest pain chronic cough belching dyspepsia globus and more Some studies have demonstrated that symptom presentation varies between ERD and NERD with atypical symptoms presenting exceedingly in ERD and typical manifestations more frequent with concurrent atypical symptoms
NERD patients often report comparable symptom severity to ERD patients despite typically conferring lower OAE suggesting that clinically-relevant NERD may be concomitant with FGIDs or attributable to VH Mechanoreceptor hypersensitivity may contribute to symptom perception as one study found that those with NERD FH and RH exhibited increased sensitivity to oesophageal balloon distension compared to controls and ERD patients From this it is hypothesised that predisposition to FGIDs may impact experienced GORD symptoms regardless of OAE
Previous studies have found significant overlap in the prevalence of GORD and IBS suggesting shared underlying dysfunction Furthermore GORD concomitant with IBS has been found to present with exceedingly frequent atypical symptoms than GORD alone however only a minority of symptoms were investigated many of which may be specific to IBS Additionally males with IBS have been found to experience significantly greater reflux symptoms than controls despite no GORD diagnoses highlighting the potential influence of IBS on perceived symptoms Moreover IBS has been shown not to affect OAE yet was associated with significantly higher GORD symptom scores with influence comparable to OAE
Whilst these studies demonstrate an association between IBS and GORD symptoms the criteria that were used to diagnose IBS are outdated and oversimple failing to distinguish between IBS subtypes Furthermore as the pH studies used measured only OAE to diagnose GORD these are too simplistic to assess the potential influence of oesophageal FGIDs and non-acidic reflux on symptoms
Improved understanding of the link between these conditions may enhance diagnosis and treatment for the abundance of people with both GORD and IBS Therefore this research primarily aims to investigate whether GORD concomitant with IBS manifests a particular presentation of symptoms whether concomitance with IBS may influence GORD severity using multichannel intraluminal impedance-pH monitoring MII-pH and whether this differs between IBS subtypes
MII-pH is the gold-standard for diagnosing GORD as it assesses weakly-acidic and non-acidic reflux proximal extension and baseline impedance along with standard pH findings It is essential for distinguishing NERD RH and FH by classification of acid exposure time non-acid reflux and symptom association Baseline impedance may also distinguish GORD and FH as GORD has been shown to exhibit a lower baseline impedance due to reduced mucosal integrity Furthermore proximal reflux extension has been shown to correlate with atypical symptoms such as chronic cough and is higher in those with NERD than RH therefore is valuable for understanding symptom changes and distinguishing conditions These previous findings necessitate the use of MII-pH in this project to wholly interpret any identifiable association between IBS and specific symptoms by assessing the potential for a shared functional cause of IBS and oesophageal FGIDs Therefore this research further aims to investigate whether MII-pH parameters differ between IBS and non-IBS patients
Additionally a vague association has been identified between IBS and oesophageal motility which may indicate that influence of IBS on GORD symptoms relates to smooth muscle dysfunction rather than functional causes One study identified pathologically altered oesophageal motility patterns in IBS while others found significantly lower LOS pressures which may explain the overlap with upper gastrointestinal conditions However the significance of these findings in relation to the effect on GORD symptoms is unclear particularly with the use of outdated conventional manometry to assess motility patterns and small sample sizes Therefore this project secondarily aims to investigate whether oesophageal motility patterns differ between IBS and non- IBS patients using high-resolution oesophageal manometry
Study Oversight
Has Oversight DMC:
None
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?:
None