Mean (SD) values for sphincter of Oddi ( SO ) resting pressures and phasic activity variables in the four groups of patients
| Gall stone colicky (n=23) | Gall stone non-colicky (n=15) | Controls (n=25) | Cholecystectomy (n=12) | |
|---|---|---|---|---|
| Resting SO pressure | ||||
| Mean SO basal pressure (mm Hg) | 23.1 (14)1-150 | 18.9 (8) | 14.3 (6) | 14.7 (6) |
| Maximal SO basal pressure (mm Hg) | 47.2 (30)1-160 | 36.2 (17)1-160 | 21.5 (8) | 26.2 (10) |
| Phasic activity | ||||
| Frequency (cycle/min) | 2.5 (1.3) | 1.7 (1.9) | 3.1 (1.4) | 2.2 (0.7) |
| Duration (s) | 6 (1.6) | 5.7 (1.6) | 6.1 (1.6) | 5.9 (1.6) |
| Amplitude (mm Hg) | 91 (24) | 94 (37) | 101 (31) | 70 (16) |