2018 Volume 60 Issue 5 Pages 1095-1106
High resolution esophageal manometry (HREM) in which solid state sensors are located one centimeter apart on the catheter has been developed. The Chicago classification is a newly proposed classification of esophageal motility disorders. Esophageal motility disorders are systemically classified in the Chicago classification and a diagnostic schema in the Chicago classification allows physicians to diagnose esophageal motility disorders by inputting values of parameters. Esophageal achalasia is characterized by impaired swallow-related esophago-gastric junction relaxation and absence of esophageal peristalsis. Esophageal achalasia is divided into three types and treatment outcomes are different among these types. Attention should be paid to different cut-off values of parameters in the Chicago classification between ManoScan and other systems with a Unisensor catheter. In addition, artifacts sometimes affect values of parameters measured by HREM; therefore, it is important to diagnose esophageal motility disorders comprehensively in combination with other tests such as esophagography.
