Retrospective Study
Copyright ©The Author(s) 2020. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Gastrointest Surg. May 27, 2020; 12(5): 236-246
Published online May 27, 2020. doi: 10.4240/wjgs.v12.i5.236
Software improvement for evaluation of laryngopharyngeal pH testing (Restech) – a comparison between DataView 3 and 4
Dolores Thea Müller, Elena Schulte, Benjamin Babic, Laura Knepper, Claudia Fuchs, Wolfgang Schröder, Christiane J Bruns, Jessica M Leers, Hans Friedrich Fuchs
Dolores Thea Müller, Elena Schulte, Benjamin Babic, Laura Knepper, Claudia Fuchs, Wolfgang Schröder, Christiane J Bruns, Jessica M Leers, Hans Friedrich Fuchs, Department of General, Visceral, Cancer and Transplant Surgery, University of Cologne, Köln 50937, Germany
Author contributions: Fuchs HF and Müller DT designed and performed the research and wrote the paper; Fuchs HF, Müller DT and Schulte E contributed to data management; Fuchs HF, Babic B, Müller DT, Leers JM, Schröder W and Bruns CJ contributed to statistical analysis and interpretation of data; Fuchs HF, Babic B, Müller DT, Knepper L, Schulte E, Fuchs C, Schröder W, Bruns CJ and Leers JM revision of the manuscript for important intellectual content.
Institutional review board statement: This study was reviewed and approved by the Ethics Committee of the Medical Faculty of the University of Cologne.
Informed consent statement: Signed informed consent forms were deemed unnecessary by our institutional review board due the retrospective study design. The study conforms to the provisions of the Declaration of Helsinki in 1995 (as revised in Edinburgh 2000). Patient anonymity was preserved.
Conflict-of-interest statement: Dolores Müller has received an educational grant from Restech. All other authors have nothing to disclose.
Data sharing statement: No additional data are available.
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Corresponding author: Hans Friedrich Fuchs, MD, Assistant Professor, Surgeon, Department of General, Visceral, Cancer and Transplant Surgery, University of Cologne, Kerpener Straße 62, Köln 50937, Germany. hans.fuchs@uk-koeln.de
Received: December 30, 2019
Peer-review started: December 30, 2019
First decision: April 3, 2020
Revised: April 9, 2020
Accepted: May 5, 2020
Article in press: May 5, 2020
Published online: May 27, 2020
Core Tip

Core tip: The Restech Dx-pH is a valid method to measure acid exposure above the upper esophageal sphincter. However, recently a new software update was introduced for calculation of composite scores. Patients with extraesophageal reflux symptoms, who underwent laryngopharyngeal pH monitoring using the Restech Dx-pH system and simultaneous esophageal pH monitoring were evaluated using DataView 3 and DataView 4. A total of 174 patients met inclusion criteria. Mean RYAN score upright and supine differed significantly between both software versions (a,cP = 0.0001) with composite scores mostly decreasing. Our data suggests that DataView 4 may be an improvement of the Restech pH measurement in the evaluation of laryngopharyngeal reflux.