Letters To The Editor
Copyright ©The Author(s) 2015. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Gastrointest Endosc. Jul 10, 2015; 7(8): 830-832
Published online Jul 10, 2015. doi: 10.4253/wjge.v7.i8.830
Toward an easier indigocarmine chromoendoscopy
Maximilien Barret, Marine Camus, Sarah Leblanc, Romain Coriat, Frédéric Prat, Stanislas Chaussade
Maximilien Barret, Marine Camus, Sarah Leblanc, Romain Coriat, Frédéric Prat, Stanislas Chaussade, Gastroenterology Department, Cochin Hospital, 75014 Paris, France
Maximilien Barret, Marine Camus, Sarah Leblanc, Romain Coriat, Frédéric Prat, Stanislas Chaussade, Medical School, Paris Descartes University, 75006 Paris, France
Author contributions: Barret M drafted the manuscript; Camus M, Leblanc S and Coriat R performed the endoscopic procedures; Prat F corrected the manuscript; Chaussade S performed the endoscopic procedures and designed the study; all authors approved the final version of the manuscript.
Conflict-of-interest statement: None.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (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/
Correspondence to: Maximilien Barret, MD, MSc, Gastroenterology Department, Cochin Hospital, 27 Rue du Faubourg St Jacques, 75014 Paris, France. maximilien.barret@cch.aphp.fr
Telephone: +33-1-58411967 Fax: +33-1-79724571
Received: December 9, 2014
Peer-review started: December 9, 2014
First decision: January 8, 2015
Revised: April 13, 2015
Accepted: April 27, 2015
Article in press: April 29, 2015
Published online: July 10, 2015
Processing time: 217 Days and 17.9 Hours
Abstract

Indigocarmine chromoendoscopy has been proven to improve the detection of colonic lesions during screening colonoscopy, and is associated with increased adenoma detection rates. Furthermore, it is commonly used to help in the delineation and characterization of colorectal neoplasms. However, it usually requires the use of a spraying catheter that decreases the suction capacity of the endoscope, and is time- consuming. Herein, we report on the feasibility of indigo carmine chromoendoscopy during colonoscopy without using a spraying catheter, with the dye being administered through the air/water channel of the endoscope. Since the suction channel remains free, the air can be exsufflated and the staining then applies uniformly onto the colonic walls with the excess indigocarmine dye being immediately eliminated. In our experience with various types of colonoscopes and cap-assisted colonoscopy, this procedure makes indigocarmine chromoendoscopy much easier and quicker to perform, and might save the use of a spray catheter.

Keywords: Indigocarmine; Chromoendoscopy; Colonoscopy; Adenoma detection rate; Colorectal cancer screening

Core tip: We report on the feasibility of indigocarmine chromoendoscopy during colonoscopy without using a spraying catheter, with the dye being administered through the air/water channel of the endoscope.