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Related Concept Videos

Gastroesophageal Reflux Disease01:25

Gastroesophageal Reflux Disease

Gastroesophageal reflux disease (GERD) is the backward flow of stomach contents (acid, pepsin, or bile) into the esophagus, causing mucosal inflammation known as esophagitis. It results from failure of antireflux mechanisms, mainly the lower esophageal sphincter (LES), influenced by mechanical and physiological factors.Etiology and Risk FactorsGERD develops when LES function is weakened or when intra-abdominal pressure increases. Risk factors include aging, obesity, and sliding hiatal hernia,...
Gastroesophageal Reflux Disease II: Clinical Features and Management01:29

Gastroesophageal Reflux Disease II: Clinical Features and Management

Gastroesophageal reflux disease, or GERD, is a persistent medical condition that affects many individuals worldwide. Its clinical manifestations can vary greatly, making diagnosis and management challenging for healthcare professionals. The following is a comprehensive overview of the clinical manifestations, assessment, and management strategies for GERD.
Clinical Manifestations
GERD presents itself in a multitude of ways, with symptoms varying from person to person. The hallmark symptoms are...
Gastroesophageal Reflux Disease I: Meaning and Pathophysiology01:29

Gastroesophageal Reflux Disease I: Meaning and Pathophysiology

Gastroesophageal Reflux Disease (GERD) involves the recurrent backflow of the stomach or duodenal contents into the esophagus, leading to troublesome symptoms and potential esophageal mucosal damage. Although GERD is often referred to as a disease, it is more accurately described as a syndrome, as it encompasses a range of symptoms and complications rather than a singular pathological entity, impacting a large number of individuals as the most prevalent upper gastrointestinal problem. Roughly...
Mixtures of Acids01:19

Mixtures of Acids

The pH of a solution containing an acid can be determined using its acid dissociation constant and initial concentration. If a solution contains two different acids, then its pH can be determined using one of several methods depending on the relative strength of the acids and their dissociation constants.
In a strong and weak acid mixture, the strong acid dissociates completely and becomes a source of almost all the hydronium ions present in the solution. In contrast, the weak acid shows...
Mixtures of Acids03:27

Mixtures of Acids

The pH of a solution containing an acid can be determined using its acid dissociation constant and its initial concentration. If a solution contains two different acids, then its pH can be determined using one of several methods depending upon the relative strength of the acids and their dissociation constants.
A Mixture of a Strong Acid and a Weak Acid
In a mixture of a strong acid and a weak acid, the strong acid dissociates completely and becomes a source of almost all the hydronium ions...
Acid Suppressive Drugs for Peptic Ulcer Disease: Antacids01:31

Acid Suppressive Drugs for Peptic Ulcer Disease: Antacids

In the complex environment of the gastric lumen, excessive acid secretion can lead to the formation or worsening of ulcers within the delicate mucosal layer. Antacids, such as sodium bicarbonate and calcium carbonate, provide relief by neutralizing this acid, transforming it into harmless salt and water. This neutralization process raises the gastric pH from a highly acidic level of 1 to a more basic 3-4, reducing the acidity within the stomach.
However, this neutralization reaction between...

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Related Experiment Video

Updated: Jun 23, 2026

Simultaneous Laryngopharyngeal and Conventional Esophageal pH Monitoring
06:46

Simultaneous Laryngopharyngeal and Conventional Esophageal pH Monitoring

Published on: December 14, 2020

Weakly acidic reflux.

Jan Tack1, Kathleen Blondeau

  • 1Department of Pathophysiology, University of Leuven, Leuven, Belgium. jan.tack@med.kuleuven.ac.be

Digestive Diseases (Basel, Switzerland)
|May 15, 2009
PubMed
Summary
This summary is machine-generated.

Weakly acidic reflux plays a role in gastroesophageal reflux disease symptoms, especially when on proton pump inhibitor (PPI) therapy. More research is needed on managing persistent symptoms and weakly acidic reflux in patients on PPIs.

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Last Updated: Jun 23, 2026

Simultaneous Laryngopharyngeal and Conventional Esophageal pH Monitoring
06:46

Simultaneous Laryngopharyngeal and Conventional Esophageal pH Monitoring

Published on: December 14, 2020

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver
08:25

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

Published on: August 27, 2021

Area of Science:

  • Gastroenterology
  • Digestive Health
  • Esophageal Disorders

Background:

  • Gastroesophageal reflux disease (GERD) pathophysiology traditionally focused on acid reflux.
  • pH impedance monitoring now allows evaluation of weakly acidic reflux.
  • Proton pump inhibitor (PPI) therapy is a cornerstone in GERD management.

Purpose of the Study:

  • To assess the role of weakly acidic reflux in GERD symptoms, particularly under PPI therapy.
  • To investigate the association between weakly acidic reflux and persistent GERD symptoms.
  • To highlight the need for further research on managing refractory GERD.

Main Methods:

  • Utilizing pH impedance monitoring to differentiate between acid and weakly acidic reflux events.
  • Analyzing symptom occurrence in relation to reflux events, both off and on PPI therapy.
  • Reviewing existing literature on weakly acidic reflux and its impact on GERD.

Main Results:

  • Typical reflux symptoms off PPI therapy correlate mainly with acid reflux.
  • Weakly acidic reflux significantly associates with symptom occurrence only during PPI therapy.
  • Reflux-related cough is a key symptom linked to weakly acidic reflux without PPIs.

Conclusions:

  • Weakly acidic reflux is significant in GERD, especially in patients on PPIs.
  • Further studies are crucial to guide therapeutic strategies for persistent GERD symptoms on PPIs.
  • There is a lack of evidence-based outcomes for interventions targeting persistent weakly acidic reflux.