Evidence map›Paper›PMID 21602992›Full record

ArticleJournal of neurogastroenterology and motility2011

Yield of combined impedance-pH monitoring for refractory reflux symptoms in clinical practice.

Georgios Karamanolis, Georgios Kotsalidis, Konstantinos Triantafyllou, Dimitrios Polymeros, Asimina Gaglia, Smaragdi Fessatou, Maria Triantafyllou, Ioannis Papanikolaou, Spiros D Ladas

Open access · hybridAbstract read
In one paragraph

Article in Journal of neurogastroenterology and motility, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 1 pooled it
2.4field-weighted citation impact, top 12% 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

17 citing papers in PubMed, 1 synthesis or guideline pooled it, 26 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Reflux definitions in esophageal multi-channel intraluminal impedance.Gastroenterology and hepatology from bed to bench · 2023
    Article
  5. Article
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  7. Management of refractory typical GERD symptoms.Nature reviews. Gastroenterology & hepatology · 2016
    Review
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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

9 authors at 2 institutions in 2 countries.

Georgios KaramanolisHepatogastroenteroly Unit, 2nd Department of Internal Medicine - Propaedeutic, Attikon University General Hospital, Athens Medical School, Athens, Greece. georgekaramanolis@yahoo.co.uk
Georgios Kotsalidis
Konstantinos Triantafyllou
Dimitrios Polymeros
Asimina Gaglia
Smaragdi Fessatou
Maria Triantafyllou
Ioannis Papanikolaou
Spiros D Ladas
University General Hospital Attikon · GRAthens State University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND/

aimsIn patients with gastroesophageal reflux disease, persistent symptoms on proton pump inhibitor (PPI) therapy may be due to residual acid or non-acid reflux. Combined impedance-pH has been suggested to be superior to pH alone in the management of refractory patients to PPI. The utility of implementation of this technique in every day clinical practice is still unknown. The aim of this study was to investigate the outcomes of patients studied with combined impedance-pH and to evaluate the yield of additional impedance monitoring over pH alone in patients with persistent gastroesophageal reflux disease symptoms.

methodsSeventy-one patients (31 men; mean age, 49.1 ± 15.5 years) on PPI therapy underwent combined impedance-pH for persistent typical (76%) or atypical (49%) symptoms.

resultsDuring impedance-pH study, 44 (62%) patients reported symptoms. A positive symptom index (SI) was found in 21 (48%) patients: 8 (18.2%) had a positive SI for acid reflux, 9 (20.5%) for non-acid reflux and 4 (9.1%) for mixed reflux. Addition of impedance allowed association between reflux and symptoms in 20.5% of patients who would have been missed by pH study alone. Heartburn was the most prevalent symptom associated with acid reflux, whereas regurgitation and ear, nose and throat symptoms were associated with non-acid reflux.

conclusionsThe use of combined impedance-pH monitoring substantially increased the diagnostic yield compared to pH alone. With SI analysis, 20.5% of patients received a diagnosis that could not have been achieved with pH testing alone.

Indexed as

Electric impedanceEsophageal pH monitoringGastroesophageal reflux

Identifiers

PMID21602992
PMCPMC3093007
OpenAlexW2001785726

What OpenQuestion holds

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LicenceCC BY-NC
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.