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. 2018 Aug 15;6(9):1323–1330. doi: 10.1177/2050640618796752

Figure 1.

Figure 1.

Esophageal shortening and pan-esophageal pressurization during the rapid drink test (RDT). The pink boxes above the pressure topography plots indicate the period with repetitive swallows during RDT. (a) Esophageal shortening is defined as an elevation of the lower esophageal sphincter (LES) greater than 1 cm (7.5 cm on this example; the dashed lines indicate the lower border of the LES). (b) Pan-esophageal pressurization is defined as a homogeneous pressurization > 30 mmHg between the upper esophageal sphincter (UES) and the LES (indicated with vertical white arrows).