J Neurogastroenterol Motil  
Understanding The Chicago Classification. From Tracings to Patients
Francisco Schlottmann,1* Fernando A Herbella,2 and Marco G Patti1
1Department of Surgery and Center for Esophageal Diseases, University of North Carolina, Chapel Hill, NC, USA; and 2Department of Surgery, Escola Paulista de Medicina, Federal University of Sao Paulo, Sao Paulo, Brazil
Correspondence to: Francisco Schlottmann, MD
University of North Carolina at Chapel Hill, 4030 Burnett Womack Building, 101 Manning Drive, CB 7081, Chapel Hill, NC 27599-7081, USA
Tel: +1-919-966-8436 , Fax: +1-919-966-8440, E-mail: fschlottmann@hotmail.com
Received: February 22, 2017; Revised: April 26, 2017; Accepted: June 9, 2017; Published online: September 1, 2017.
© The Korean Society of Neurogastroenterology and Motility. All rights reserved.

cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current parameters of the Chicago classification include assessment of the esophageal body (contraction vigour and peristalsis), lower esophageal sphincter relaxation pressure, and intra-bolus pressure pattern. Esophageal disorders include achalasia, esophagogastric junction outflow obstruction, major disorders of peristalsis, and minor disorders of peristalsis. Sub-classification of achalasia in types I, II, and III seems to be useful to predict outcomes and choose the optimal treatment approach. The real clinical significance of other new parameters and disorders is still under investigation.
Keywords: Chicago classification; Esophageal achalasia; Esophageal motility disorders; High-resolution manometry

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