Background: The functional lumen imaging probe (EndoFLIP), which utilizes impedance planimetry, has emerged as a valuable tool for a more comprehensive evaluation of esophageal physiology and pathophysiology beyond traditional high-resolution manometry. Summary: EndoFLIP, including its variations EndoFLIP and EsoFLIP, measures intraluminal distensibility and compliance by assessing diameter and distension pressure using balloon catheters. Key Messages: This technology is applicable to various organs such as the esophagus, stomach, and anorectal region, and serves in both diagnostic and therapeutic contexts, especially in ambiguous clinical cases.

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