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Gastroesophageal Reflux Disease II: Clinical Features and Management01:29

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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.
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An Esophagogastroduodenoscopy (EGD) is a diagnostic procedure in which an endoscopist uses a flexible, lighted endoscope to visualize the upper gastrointestinal (GI) tract. The procedure includes visualizing the oropharynx, esophagus, stomach, and the first part of the small intestine, the duodenum.
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Assessment of the Gastrointestinal System I: Subjective Data01:17

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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...
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Updated: Jun 15, 2025

Simultaneous Laryngopharyngeal and Conventional Esophageal pH Monitoring
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pHoenix score: development and validation of a novel approach to decrease the number of inconclusive GERD diagnoses.

Andrés R Latorre-Rodríguez1,2, Sumeet K Mittal3,4, Hailey Simmonds5

  • 1Norton Thoracic Institute, St. Joseph's Hospital and Medical Center, 500 W Thomas Road, Phoenix, AZ, 85013, USA.

Surgical Endoscopy
|August 27, 2024
PubMed
Summary
This summary is machine-generated.

A new pHoenix score improves gastroesophageal reflux disease (GERD) diagnosis by considering positional acid exposure time (AET). This score reduces inconclusive cases compared to total AET alone, offering a more definitive GERD diagnosis.

Keywords:
Ambulatory esophageal pH monitoringGERDGastroesophageal refluxPH monitoringReflux

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Area of Science:

  • Gastroenterology
  • Medical Diagnostics
  • Reflux Disease Research

Background:

  • The Johnson-DeMeester score (DMS) is a traditional benchmark for diagnosing gastroesophageal reflux disease (GERD).
  • The Lyon Consensus defines GERD diagnosis using pH monitoring, with normal acid exposure time (AET) <4% and pathological AET >6%, leaving a 4-6% range for diagnostic uncertainty.
  • Positional differences in AET (supine vs. upright) are not fully addressed by current diagnostic criteria.

Purpose of the Study:

  • To quantify how many borderline GERD cases (total AET 4-6%) are reclassified by the DMS.
  • To assess the impact of supine AET on reclassifying borderline GERD cases.
  • To introduce a novel composite score, the pHoenix score, incorporating positional AET for improved GERD diagnosis.

Main Methods:

  • Retrospective analysis of 114 patients with 48-hour Bravo pH monitoring (total AET 2-6%).
  • Development of the pHoenix score using regression coefficients from supine and upright AET.
  • Internal validation and comparison of the pHoenix score's discriminative ability against the DMS and total AET.

Main Results:

  • The pHoenix score showed strong discriminative ability (AUC: 0.957), with high sensitivity and specificity.
  • Using total AET, 77.2% of cases were borderline; the pHoenix score reduced this to 13.2% (p<0.001).
  • The pHoenix score effectively reclassified borderline cases, distinguishing between normal and pathological GERD.

Conclusions:

  • Total AET alone has limited sensitivity for pathological reflux due to ignoring positional variations.
  • The pHoenix score enhances the differentiation of normal versus pathological GERD cases, reducing diagnostic ambiguity.
  • The pHoenix score provides a more refined diagnostic approach for GERD, addressing limitations of total AET and the DMS.