Role of EndoFLIP in the Diagnostic Paradigm of Esophagogastric Junction Outflow Obstruction
Role of EndoFLIP in the Diagnostic Paradigm of Esophagogastric Junction Outflow Obstruction
The aim of this project is to identify if EndoFLIP can categorize and change the diagnosis in patients with EGJOO and if categorization with EndoFLIP can predict the response to treatment with botulinum toxin at 12 weeks post procedure. Our hypothesis is that there will be greater symptom resolution in the treatment versus control in the abnormal DI category. In addition, we hypothesize there will be less symptom resolution in the control group with an abnormal DI as compared to those with a normal DI who also receive no treatment.
Esophagogastric Outflow Obstruction (EGJOO) is a newer diagnosis in which some patients' symptoms resolve spontaneously or with conservative treatment, while others require treatment with botulinum toxin injected into the lower esophageal sphincter. Currently, there is no way to distinguish these two groups of patients upon diagnosis. EndoFLIP (endolumenal functional lumen imaging probe) is a new technology that can measure the distensibility index (DI) of the lower esophageal sphincter. Data has suggested that normal and abnormal DI measurements can categorize these patients and guide treatment course (1). Our study looks to confirm this finding.
1. Elsbernd et al. Clinical characteristics and treatment response of esophagogastric junction outflow obstruction. Gastroenterology 2019;156(6):S-1017.
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