Table 1.
Descriptive features of UES at rest and during TLESR
| Upright (N = 10) |
Recumbent (N = 10) |
|||
|---|---|---|---|---|
| NBaseline = 109 NTLESR = 109 NSwallow = 109 | Baseline | TLESR | Baseline | TLESR |
| UES length, cm | 3.4 ± 0.6 | 4.5 ± 0.8* (n = 45) | 3.4 ± 0.6 | 4.6 ± 1* (n = 35) |
| UES position to baseline, cm | N/A | 0.8 ± 0.5 (n = 25) | N/A | N/A |
| Average UES pressure, mmHg | 45 ± 17 | N/A | 46 ± 20 | 70 ± 30* (n = 45) |
| Peak UES pressure, mmHg | 54 ± 18 | N/A | 65 ± 35 | 122 ± 63* (n = 45) |
| Swallow | TLESR | Swallow | TLESR | |
| UES relaxation nadir pressure, mmHg | −4 ± 2 | 4 ± 2* (n = 47) | −3 ± 3 | N/A |
| UES relaxation duration, s | 0.7 ± 0.3 | 1.4 ± 0.6* (n = 62) | 0.6 ± 0.2 | N/A |
| UES relaxation nadir duration, s | 0.3 ± 0.1 | 0.7 ± 0.3* (n = 47) | 0.3 ± 0.1 | N/A |
| dP/dt of UES relaxation, mmHg/s | 596 ± 195 | 361 ± 127* (n = 62) | 605 ± 278 | N/A |
| dP/dt of UES contraction, mmHg/s | 1601 ± 557 | N/A | 1380 ± 345 | 266 ± 160* (n = 42) |
Applicable values are means ± SD.
*
P < 0.01 compared with the respective baseline or swallow-related value. UES, upper esophageal sphincter; TLESR, transient lower esophageal sphincter relaxation.