Endoscopic Tri-Modal Imaging to Distinguish Functional Dyspepsia From Reflux Disease

Study Overview
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Brief Summary
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Endoscopic Tri-Modal Imaging which combines Narrow-band Imaging(NBI), Autofluorescence Imaging (AFI) and White-light Imaging (WLI) could be used to identify the indistinct changes in the gut caused by reflux disease,either acid reflux or bile reflux, which make it possible to differentiate reflux disease from functional dyspepsia (FD).

Detailed Description
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Functional dyspepsia (FD) and acid/bile reflux disease are common. These diseases share similar clinical manifestations. Individuals with functional dyspepsia (FD) often present upper abdominal pain or discomfort, bloating, early satiety, loss of appetite, and no organic factors underlie it. Individuals suffering from acid/bile reflux disease often complain heartburn, upper abdominal burning or discomfort. What is more, there are always no specific changes on traditional endoscopy that can be used to differentiate these diseases (except erosive esophagitis). Though proton-pump inhibitor (PPI) test is frequently applied to confirm the diagnosis of acid reflux disease, but certain amounts of individuals with gastroesophageal reflux disease (GERD) do not show favorable response to PPI test. In order to make a distinction of these diseases, esophageal pH-metry is needed, however it is not always available in most clinics. Recent data showed that new endoscopic technology such as Endoscopic Tri-Modal Imaging could demonstrate indistinct lesions caused by GERD which are not detectable by standard endoscopy, subsequently improve endoscopic diagnosis of these diseases. In addition, simultaneous analysis of gastric juice can help to determine whether bile reflux is present or not. As it is known, pathologic refluxes underlie not functional dyspepsia but acid/bile reflux disease. Hence, it is hypothesized that Endoscopic Tri-Modal Imaging in combination with simultaneous analysis of gastric juice could be used to differentiate functional dyspepsia from acid/bile reflux disease.

Official Title
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The Role of Endoscopic Tri-Modal Imaging in Distinguishing Functional Dyspepsia From Reflux Disease

Conditions
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Gastroesophageal Reflux Disease, Dyspepsia, Bile Reflux

Intervention / Treatment
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* Device: Endoscopic Tri-Modal Imaging
* Drug: Omeprazole
* Other: Analysis of gastric juice


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: symptoms suggestive of GERD or dyspepsia. Presence of symptom for longer than 6 month Provision of written informed consent Exclusion Criteria: Any known upper GI disease, other than reflux esophagitis Active or healing gastroduodenal ulcer (except scars) History of esophageal or gastric surgery. Clinically significant heart, lung, liver or kidney disease Allergy to proton-pump inhibitor Pregnancy

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 75 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Functional dyspepsia<br>Participants are to undergo Endoscopic Tri-Modal Imaging, Omeprazole test and Analysis of gastric juice and those who fulfill with Rome III criteria for functional dyspepsia are to be classified into this group. | Device: Endoscopic Tri-Modal Imaging<br>* Endoscope that combines white light imaging (WLI) with autofluorescence imaging (AFI) and narrow band imaging (NBI).<br>Drug: Omeprazole<br>* Omeprazole is one kind of proton-pump inhibitors. All participants undergo standard proton-pump inhibitor (PPI) tests for two weeks with Omeprazole, 20mg twice a day.<br>* Other names: proton-pump inhibitor (PPI);Other: Analysis of gastric juice<br>* Analysis of gastric juice including routine, biochemical and microbiological analysis.<br>* Other names: Routine,biochemical, microbiological analysis;|
| Experimental: Acid reflux disease<br>Participants are to undergo Endoscopic Tri-Modal Imaging, Omeprazole test and Analysis of gastric juice. Participants with acid reflux are to confirmed by Omeprazole test, one kind of proton-pump inhibitor (PPI) tests. | Device: Endoscopic Tri-Modal Imaging<br>* Endoscope that combines white light imaging (WLI) with autofluorescence imaging (AFI) and narrow band imaging (NBI).<br>Drug: Omeprazole<br>* Omeprazole is one kind of proton-pump inhibitors. All participants undergo standard proton-pump inhibitor (PPI) tests for two weeks with Omeprazole, 20mg twice a day.<br>* Other names: proton-pump inhibitor (PPI);Other: Analysis of gastric juice<br>* Analysis of gastric juice including routine, biochemical and microbiological analysis.<br>* Other names: Routine,biochemical, microbiological analysis;|
| Experimental: Bile reflux disease<br>Participants are to undergo Endoscopic Tri-Modal Imaging and Analysis of gastric juice. Participants with bile reflux are to be confirmed by Analysis of gastric juice. | Device: Endoscopic Tri-Modal Imaging<br>* Endoscope that combines white light imaging (WLI) with autofluorescence imaging (AFI) and narrow band imaging (NBI).<br>Other: Analysis of gastric juice<br>* Analysis of gastric juice including routine, biochemical and microbiological analysis.<br>* Other names: Routine,biochemical, microbiological analysis;|
| Experimental: Health volunteers<br>Health volunteers for routine checkup. Participants are to undergo Endoscopic Tri-Modal Imaging as well as Analysis of gastric juice and those who show no abnormal findings are to be classified into this group. | Device: Endoscopic Tri-Modal Imaging<br>* Endoscope that combines white light imaging (WLI) with autofluorescence imaging (AFI) and narrow band imaging (NBI).<br>Other: Analysis of gastric juice<br>* Analysis of gastric juice including routine, biochemical and microbiological analysis.<br>* Other names: Routine,biochemical, microbiological analysis;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Numbers of participants with abnormal endoscopic findings and positive Omeprazole tests | Numbers of participants with abnormal endoscopic findings are used to calculate the diagnostic Value of Endoscopic Tri-Modal Imaging in Distinguishing Functional Dyspepsia and Reflux Disease, including specificity, sensitivity and accuracy. | one month | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Endoscopic Tri-Modal Imaging, Gastric juice, Functional dyspepsia, Acid reflux disease, Bile reflux