Dynamic magnetic resonance imaging assessment of anorectal and pelvic floor motion
| Parameter | Controls | Faecal incontinence | No of patients with abnormal values (<5%tile, >95%tile) |
|---|---|---|---|
| All values are mean (SEM). | |||
| For vertical motion, negative and positive values reflect upward and downward motion, respectively. | |||
| For AP (anterio-posterior) motion, negative and positive values reflect anterior and posterior AP motion, respectively. | |||
| Anorectal angle at rest (°) | 104 (4) | 115 (2) | (0, 9) |
| Anorectal angle during squeeze (°) | 69 (4) | 95 (3) | (0, 21) |
| Anorectal angle during evacuation (°) | 126 (3) | 127 (3) | (9, 10) |
| Anorectal angle change (squeeze−rest) (°) | −35 (4) | −20 (2) | (18, 0) |
| Anorectal angle change (evacuation−rest) (°) | 22 (4) | 13 (3) | (1, 10) |
| Location of anorectal junction relative to pubococcygeal line at rest (cm) | 2.8 (0.2) | 2.9 (0.2) | (3, 5) |
| Anorectal junction motion from rest to squeeze (cm) | |||
| Vertical | −1.5 (0.2) | −1.4 (0.1) | (6, 0) |
| AP | −0.3 (0.2) | −0.2 (0.1) | (6, 2) |
| Anorectal junction motion from rest to evacuation (cm) | |||
| Vertical | 3.4 (0.3) | 2.3 (0.2) | (22, 2) |
| AP | 0.2 (0.2) | 0.5 (0.2) | (2, 4) |