Evidence map›Paper›PMID 33655610›Full record

ArticleNeurogastroenterology and motility2021

Chicago Classification update (v4.0): Technical review of high-resolution manometry metrics for EGJ barrier function.

Peter J Kahrilas, Ravinder K Mittal, Serhat Bor, Geoffrey P Kohn, Johannes Lenglinger, Sumeet K Mittal, John E Pandolfino, Jordi Serra, Roger Tatum, Rena Yadlapati

Open access · greenAbstract read
In one paragraph

Article in Neurogastroenterology and motility, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
5.1field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

18 citing papers in PubMed, 1 synthesis or guideline pooled it, 49 citations in OpenAlex.

  1. Pooled it
  2. Diagnostic value of real-time dynamic gastric contrast ultrasound for hiatal hernia.Hernia : the journal of hernias and abdominal wall surgery · 2026
    Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Correlation between the type of esophagogastric junction and refractory reflux esophagitis.International journal of clinical and experimental pathology · 2025
    Article
  10. Article
  11. Review
  12. Article
  13. Article
  14. Article
  15. Esophageal Motility Patterns in Paraesophageal Hernia Patients Compared to Sliding Hiatal Hernia: Bigger Is Not Better.Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract · 2023
    Article
  16. Article
  17. Article
  18. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 8 institutions in 6 countries.

Peter J KahrilasDivision of Gastroenterology, Department of Medicine, Northwestern University, Chicago, Illinois, USA.
Ravinder K MittalDepartment of Medicine, University of California, San Diego, California, USA.ORCID 0000-0002-0181-9697
Serhat BorDivision of Gastroenterology, Ege University School of Medicine, Izmir, Turkey.ORCID 0000-0001-5766-9598
Geoffrey P KohnDepartment of Surgery, Monash University, Melbourne, Victoria, Australia.
Johannes LenglingerClinic for Visceral Surgery and Medicine, Inselspital, Bern University Hospital, and University of Bern, Bern, Switzerland.
Sumeet K MittalNorton Thoracic Institute, Dignity Health, Phoenix, Arizona, USA.
John E PandolfinoDivision of Gastroenterology, Department of Medicine, Northwestern University, Chicago, Illinois, USA.
Jordi SerraDigestive System Research Unit, University Hospital Vall d'Hebron, Centro de Investigación Biomédica en Red de enfermedades hepáticas y digestivas (CIBERehd, Barcelona, Spain.ORCID 0000-0003-2120-6270
Roger TatumDepartment of Surgery, University of Washington, and VA Puget Sound Health Care System, Seattle, Washington, USA.
Rena YadlapatiDepartment of Medicine, University of California, San Diego, California, USA.ORCID 0000-0002-7872-2033
Northwestern University · USUniversity of California San Diego · USCentro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas · ESDignity Health · USEge University · TRMelbourne School of Theology · AUUniversity of Bern · CHUniversity of Washington · US

Funding

Northwestern University Clinical and Translational Science Institute (NUCATS)UL1TR001422 · NCATS · NORTHWESTERN UNIVERSITY AT CHICAGO · PI D'AQUILA, RICHARD · 2015 to 2023
$56.8M
Role of altered response to volumetric distension in esophageal diseaseP01DK117824 · NIDDK · NORTHWESTERN UNIVERSITY AT CHICAGO · PI PANDOLFINO, JOHN E · 2018 to 2022
$7.3M
Targeting Hypervigilance and Autonomic Arousal: the Psycho-physiologic Model of GERDR01DK092217 · NIDDK · NORTHWESTERN UNIVERSITY AT CHICAGO · PI JOHN E PANDOLFINO · 2012 to 2026
$5.0M
Novel Electrical Impedance Methodology to Understand Functional DysphagiaR01DK109376 · NIDDK · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI MITTAL, RAVINDER K. · 2016 to 2020
$2.5M
NCATS NIH HHS UL1 TR001422NIDDK NIH HHS P01 DK117824NIDDK NIH HHS R01 DK092217NIDDK NIH HHS R01 DK109376
6 · The paper itself

Abstract

Esophagogastric junction (EGJ) barrier function is of fundamental importance in the pathophysiology of gastroesophageal reflux disease. Impaired EGJ barrier function leads to excessive distal esophageal acid exposure or, in severe cases, esophagitis. Hence, proposed high-resolution manometry (HRM) metrics assessing EGJ integrity are clinically important and were a focus of the Chicago Classification (CC) working group for inclusion in CC v4.0. However, the EGJ is a complex sphincter comprised of both crural diaphragm (CD) and lower esophageal sphincter (LES) component, each of which is subject to independent physiological control mechanisms and pathophysiology. No single metric can capture all attributes of EGJ barrier function. The working group considered several potential metrics of EGJ integrity including LES-CD separation, the EGJ contractile integral (EGJ-CI), the respiratory inversion point (RIP), and intragastric pressure. Strong recommendations were made regarding LES-CD separation as indicative of hiatus hernia, although the numerical threshold for defining hiatal hernia was not agreed upon. There was no agreement on the significance of the RIP, only that it could localize either above the LES or between the LES and CD in cases of hiatus hernia. There was agreement on how to measure the EGJ-CI and that it should be referenced to gastric pressure in units of mmHg cm, but the numerical threshold indicative of a hypotensive EGJ varied widely among reports and was not agreed upon. Intragastric pressure was endorsed as an important metric worthy of further study but there was no agreement on a numerical threshold indicative of abdominal obesity.

Indexed as

Gastroesophageal RefluxManometryEsophageal Sphincter, LowerEsophagogastric JunctionHumanschicago classificationesophageal manometrygastroesophageal reflux diseasehiatal hernia

Identifiers

PMID33655610
PMCPMC8410874
OpenAlexW3133892565

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.