e-CASES: Normal measurments of pelvis - CT Pelvimetry
CHANNEL: Radiological classifications commonly used in medical imaging – CHU Arnaud de Villeneuve
Normal measurments of pelvis
| Measurement | From | To | Length |
|
Transverse diameter (of inlet) |
Between extreme lateral points of pelvic inlet | 13.5-14 cm | |
| Oblique diameter I | Right sacroiliac joint | Left iliopubic eminence | 12-12.5 cm |
| Oblique diameter II | Left sacroiliac joint | Right iliopubic eminence | 11.5-12 cm |
| Anatomical conjugate | Pubic symphysis | Promontory | ~12 cm |
|
True conjugate (obsteric conjugate) |
Retropubic eminence (posterior surface of symphysis) |
Promontory | 11.5 cm |
| Diagonal conjugate* | Inferior pubic ligament | Promontory | 13 cm |
| Straight conjugate | Lower border of symphysis | Tip of coccyx | 9.5-10 cm |
| Median conjugate | Lower border of symphysis | Lower border of sacrum | 11.5 cm |
|
Transverse diameter (of midpelvis) |
Bispinous | > 10 cm | |
|
Transverse diameter (of outlet) |
Between ischial tuberosities | 10-11 cm | |
| Intertrochanteric distance | Between femurs | 31 cm | |
Diagnosis
CT Pelvimetry
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