Functional oesophago-gastric junction imaging

• Published in: World journal of gastroenterology : WJG 2006-05, Vol.12 (18), p.2818-2824
• Main Authors: McMahon, Barry P, Drewes, Asbjørn M, Gregersen, Hans
• Format: Article
• Language: English
• Subjects: Biomechanical Phenomena; Diagnostic Imaging - instrumentation; Diagnostic Imaging - methods; Electric Impedance; Esophageal Achalasia - pathology; Esophageal Achalasia - physiopathology; Esophagogastric Junction - innervation; Esophagogastric Junction - pathology; Esophagogastric Junction - physiology; Fluoroscopy - methods; Gastroesophageal Reflux - pathology; Gastroesophageal Reflux - physiopathology; Humans; Manometry; Pressure; Topic Highlight; 功能性消化不良; 照影诊断; 胃疾病; 食管括约肌
• ISSN: 1007-9327; 2219-2840
• DOI: 10.3748/wjg.v12.i18.2818

Despite its role in disease there is still no definitive method to assess oesophago-gastric junction competence （OGJ）. Traditionally the OGJ has been assessed using manometry with lower oesophageal sphincter pressure as the indicator. More recently this has been shown not to be a very reliable marker of sphincter function and competence against reflux. Disorders such as gastro-oesophageal reflux disease and to a lesser extend achalasia still effects a significant number of patients. This review looks at using a new technique known as impedance planimetry to profile the geometry and pressure in the OGJ during distension of a bag. The data gathered can be reconstructed into a dynamic representation of OGJ action. This has been shown to provide a useful representation of the OGJ and to show changes to the competence of the OGJ in terms of compliance and distensibility as a result of endoluminal therapy.