Oesophageal manometry
| Case | Lower oesophageal sphincter pressure (N=14–65 cm H2O) | Propagated wave amplitude (N >50 cm H2O) | Per cent non-propagated waves (N <10%) |
| 1 | ND | ND | ND |
| 2 | 10,5 | 16 | Aperistalsis in lower third of oesophagus |
| 3 | 12 | 40 | <10 |
| 4 | 6 | 20 | Diffuse aperistalsis in oesophagus |
| 5 | 0 | 0 | Aperistalsis in lower third of oesophagus |
N, normal; ND, not done.