Adaption of the Functional Lumen Imaging Probe for non-radiological evaluation of the upper oesophageal sphincter

Abstract

The aim of this research was to adapt the Functional Lumen Imaging Probe (FLIP), a novel non-radiological measurement tool, to measure upper oesophageal sphincter (DOS) distensibility and opening patterns during swallowing. Initially, accuracy of EndoFLIP® (a commercial FLIP device) measures was investigated and the safe insertion, positioning and distension of the EndoFLIP® balloon was tested by the researcher in the DOS of two subjects with dysphagia under videofluoroscopy (VFS). Five pilot studies were subsequently completed without VFS guidance during which the EndoFLIP® probe was inserted trans-orally. Based on these studies, the researcher designed an evaluation protocol and defined outcome measures.