Changes in pressure, length, and position of the gastro-oesophageal junction (GOJ) high pressure zone (HPZ) caused by abdominal compression
| Normal subjects | Hiatus hernia | ||||
|---|---|---|---|---|---|
| HPZ 1 (proximal) | HPZ 2 (hiatal) | ||||
| Intragastric pressure change (mm Hg) | 7 (2.0) | – | 6 (2.1) | ||
| Increase in maximal GOJ pressure (mm Hg) | 13 (1.2) | 4 (0.4)3-150 | 13 (1.5) | ||
| Length change of high pressure zone (cm) | −0.1 (0.1) | −0.2 (0.1) | 0 | ||
| Movement of locus of maximal pressure (cm) | 0.5 (0.1) | 0.6 (0.1) | 0.4 (0.1) | ||
Changes in patients with hiatus hernia were measured both within the proximal high pressure zone (HPZ 1) and the hiatal canal (HPZ 2). All values are mean (SEM).
↵3-150 p<0.05 versus normal.