Chicago Classification Criteria of Esophageal Motility Disorders (EPT)
Chicago Classification Criteria of Esophageal Motility Disorders Defined in High Resolution Esophageal Pressure Topography (EPT)
High resolution esophageal pressure topography (EPT) is an evolutionary technology incorporating the combination of high resolution manometry (HRM) and pressure topography plotting in the form of Clouse plots introduced in 2000 for the clinical evaluation of esophageal motility. Prior to that, EPT had been developed and utilized as a highly innovative research modality. The HRM Working Group first met in San Diego during DDW 2007 with the objective of adapting EPT to the clinical evaluation of esophageal motility. Since then, a series of HRM Working Group meetings have ensued on a more-or-less annual basis to review, critique, and plan the iterative process of developing a practical classification for esophageal motility disorders based on EPT-specific metrics and criteria. The classification scheme was initially branded 'The Chicago Classification' in 2007 following a series of seminal publications defining key EPT metrics and interpretation criteria optimized for clinical EPT studies emanating from a group of investigators at Northwestern University in Chicago. Since then, two iterations of the Chicago Classification have been published summarizing the incremental development of the classification scheme. The most recent meeting of the HRM Working Group was in Ascona, Switzerland in conjunction an international congress focused on the clinical evaluation of esophageal disease. This paper summarizes the Chicago Classification of esophageal motility disorders emanating from the meeting at the Ascona congress.
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