Functional Lumen Imaging Probe (FLIP) is a test used to evaluate the function of the esophagus, by measuring the dimensions of the esophageal lumen using impedance planimetry. Typically performed with sedation during upper endoscopy, FLIP is used to evaluate for esophageal disorders, such as achalasia, diffuse esophageal spasm, etc.[1]
| Functional Lumen Imaging Probe |
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Procedure
FLIP uses impedence planimetry to measure the cross sectional area of the esophageal lumen. 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. 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).
FLIP consists of a balloon that encases a catheter with multiple pairs of impedence electrodes. The balloon is inserted into the esophagus and the balloon is distended with a fluid with known properties (e.g. conductivity and volume). Each electrode then measure impedence, and a single pressure sensor at the end of the device measures pressure within the balloon.
Indications
FLIP is used to evaluate for esophageal disorders, such as achalasia, diffuse esophageal spasm, etc.[1]
See also
References
- ^ a b Savarino, E; di Pietro, M; Bredenoord, AJ; Carlson, DA; Clarke, JO; Khan, A; Vela, MF; Yadlapati, R; Pohl, D; Pandolfino, JE; Roman, S; Gyawali, CP (November 2020). "Use of the Functional Lumen Imaging Probe in Clinical Esophagology". The American journal of gastroenterology. 115 (11): 1786–1796. doi:10.14309/ajg.0000000000000773. PMID 33156096.