Table 2.
Uterine displacement in magnetic resonance imaging (MRI)
| All (n = 19) | Group 1 Normal support (n = 5) |
Group 2 Normal apex/Vaginal prolapse (n = 5) |
Group 3 Apical prolapse (n = 9) |
P value | |
|---|---|---|---|---|---|
| OR force required for MRI uterine displacement (N) |
0.80 (0.62 to 3.22) | 0.79 (0.31 to 3.16) | 0.62 (0.52 to 1.39) | 0.88 (0.77 to 8.53) | .06 |
| MRI uterine displacement (cm)a | 3.5 (2.1 to 4.6) | 1.9 (1.1 to 2.5) | 3.9 (2.3 to 4.3) | 4.6 (3.4 to 5.7) | .01 |
| MRI abdominal pressure generated during uterine displacement (mmHg) |
55.0 (46.0 to 71.0) | 71.0 (46.5 to 83.0) | 49.0 (28.0 to 70.0) | 55.0 (47.5 to 64.0) | .38 |
| MRI apical ligament stiffness (N/mm)b | 0.04 (0.02 to 0.08) | 0.04 (0.03 to 0.12) | 0.02 (0.01 to 0.05) | 0.04 (0.02 to 0.14) | .47 |
Data reported as median (interquartile range). P values determined using Kruskal–Wallis. All locations measured in centimeters relative to the hymenal ring at rest, which is defined as 0
a
Cervix displacement is total movement of the cervix from rest to maximal force in magnetic resonance imaging (MRI)
b
Estimated stiffness of uterosacral/cardinal ligaments calculated using the operating room (OR) force (N) required to recreate MRI cervix displacement and MRI cervix displacement (mm)
1 N = 0.22 lb