Table 1.
The differences of esophageal motility measurements between the 22-channel WPM and 36-sensor SSM during wet swallows (n = 12)
| 22-channel WPM | 36-sensor SSM | Z value | P | |
|---|---|---|---|---|
| LES proximal margin (cm) |
41.5(38-43) |
42(39-43) |
-2.11 |
0.035 |
| LES length (cm) |
4(4-4) |
3.5(3-4) |
0.00 |
1.000 |
| LES rest pressure (mmHg) |
13.5(10-21) |
16.5(14-22.5) |
-1.69 |
0.091 |
| LES relax ratio (%) |
97.5(92-98.5) |
84(77-88.5) |
-2.20 |
0.028 |
| Distal esophageal body contraction intensity (mmHg) |
68.5(40-85.25) |
80(50-126.5) |
-1.88 |
0.060 |
| Distal esophageal body contraction duration (s) |
3.85(2.9-4.2) |
3.7(3.4-4.525) |
-1.18 |
0.238 |
| Proximal esophageal body contraction intensity (mmHg) |
39(22-54) |
51.5(40-62.75) |
-1.96 |
0.050 |
| Proximal esophageal body contraction duration (s) |
3.05(2.6-3.275) |
3.2(2.5-3.325) |
-0.67 |
0.505 |
| UES proximal margin (cm) |
17(16-18) |
16.5(16-17.25) |
-0.81 |
0.417 |
| UES length (cm) |
4(4-5) |
4(3-5) |
-0.52 |
0.603 |
| UES rest pressure (mmHg) |
56.5(43-82.5) |
77.5(60-113) |
-1.88 |
0.060 |
| UES relax ratio (%) | 100(100-100) | 100(97-100) | -0.76 | 0.446 |