Functional Lumen Imaging Probe: Difference between revisions

Revision as of 15:44, 10 April 2021

Revision as of 16:12, 8 June 2021

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FLIP uses impedance planimetry to measure the cross sectional area of the esophageal lumen.<ref name=Savarino /> The FLIP device consists of a balloon that encases a catheter with multiple pairs of impedance electrodes. Two catheter configurations are available, which are 8 cm and 16 cm in length. The 8 cm catheter includes 16 sensors spaced 0.5 cm apart, and is used to evaluate esophagogastric junction (EGJ) distensibility and CSA.<ref name=Savarino /> Alternatively, the 16 cm catheter has 16 sensors spaced 1 cm apart, and may be used to evaluate contractility via secondary peristalsis patterns, in addition to evaluating the esophagogastric junction (EGJ).<ref name=Savarino />

Following upper endoscopy, the balloon is inserted into the esophagus and the balloon is distended with a fluid with known properties (e.g. conductivity and volume).<ref name=Savarino /> Each electrode then measuremeasures impedance, and a single pressure sensor at the end of the device measures pressure within the balloon.<ref name=Savarino />

==Results==