Figure 1.

Manoview and isobaric contour image generated from binary manometric data. (A) Manoview image of 5 mL water swallow. (B) Isobaric contour generated from MATLAB program. Integrated relaxation pressure of upper esophageal sphincter (UES) is defined as mean of the pressures during specific time interval of maximal deglutitive relaxation in specific time window beginning at UES relaxation, and the types of variables that must be set for calculation are the time window beginning at UES relaxation [a] correlating to a 10-second window at lower esophageal sphincter (LES), the time interval [b] (dotted horizontal, red line; correlating to a 4-second IRP at LES), and the thickness of UES; distance between 2 sensors [c] (dotted vertical, red line); and 3 sensors [d] (linear vertical, red line).