Virtual biopsy by electrical impedance spectroscopy in Barrett’s carcinoma

  • Purpose: Early detection of adenocarcinomas in the esophagus is crucial for achieving curative endoscopic therapy. Targeted biopsies of suspicious lesions, as well as four-quadrant biopsies, represent the current diagnostic standard. However, this procedure is time-consuming, cost-intensive, and examiner-dependent. The aim of this study was to test whether impedance spectroscopy is capable of distinguishing between healthy, premalignant, and malignant lesions. An ex vivo measurement method was developed to examine esophageal lesions using impedance spectroscopy immediately after endoscopic resection. Methods: After endoscopic resection of suspicious lesions in the esophagus, impedance measurements were performed on resected cork-covered tissue using a measuring head that was developed, with eight gold electrodes, over 10 different measurement settings and with frequencies from 100 Hz to 1 MHz. Results: A total of 105 measurements were performed in 60 patients. A dataset of 400 per investigation and a total of more than 42,000 impedance measurements were therefore collected. Electrical impedance spectroscopy (EIS) was able to detect dysplastic esophageal mucosa with a sensitivity of 81% in Barrett’s esophagus. Conclusion: In summary, EIS was able to distinguish different tissue characteristics in the different esophageal tissues. EIS thus holds potential for further development of targeted biopsies during surveillance endoscopy.
Author:Sandra Blößer, Andrea May, Lukas Welsch, Michael Ast, Susanne Braun, Thomas Velten, Margit Biehl, Jonas Tschammer, Elke Roeb, Mate KnabeORCiD
Parent Title (English):Journal of gastrointestinal cancer
Publisher:Springer US
Place of publication:New York, NY
Document Type:Article
Date of Publication (online):2021/09/24
Date of first Publication:2021/09/24
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2022/02/09
Issue:Online Version of Record before inclusion in an issue
Page Number:10
Open Access funding enabled and organized by Projekt DEAL. This study received funding from the KMU-Innovativ, BMBF Project Z-Zmart Detect Förderkennzeichen, Federal Ministry of Education and Research: 13GW0056A and Stockert GmbH.
Early View-Version: Online Version of Record before inclusion in an issue.
Institutes:Medizin / Medizin
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit
Licence (German):License LogoCreative Commons - Namensnennung 4.0