Pelvic outlet
| Pelvic outlet | |
|---|---|
 Diameters of inferior aperture of lesser pelvis (female) | |
 Muscles of the female perineum | |
| Details | |
| Identifiers | |
| Latin | apertura pelvis inferior |
| TA98 | A02.5.02.009 |
| TA2 | 1290 |
| FMA | 17273 |
| Anatomical terms of bone | |
The lower circumference of the
lesser pelvis is very irregular; the space enclosed by it is named the inferior aperture or pelvic outlet. It is an important component of pelvimetry
.
Boundaries
It has the following boundaries:
- anteriorly: the pubic arch
- laterally: the ischial tuberosities
- posterolaterally: the inferior margin of the sacrotuberous ligament
- posteriorly: the anterior border of the middle of the coccyx.[1]
Notches
These eminences are separated by three notches:
- one in front, the on either side.
- The other notches, one on either side, are formed by the sacrotuberous and sacrospinous ligaments.
In situ
When the ligaments are in situ, the inferior aperture of the pelvis is lozenge-shaped, bounded as follows:
- in front, by the inferior rami of the pubes and ischia
- laterally, by the ischial tuberosities
- behind, by the sacrotuberous ligaments and the tip of the coccyx.
See also
Additional images
-
Articulations of pelvis. Anterior view. -
Articulations of pelvis. Posterior view. -
Low-dose CT scan of sagittal pelvic outlet diameter as part of pelvimetry -
Intertuberous diameter, as a measure of the transverse measure of the pelvic outlet
References
- ISBN 978-0-443-10281-3.)
{{cite book}}: CS1 maint: multiple names: authors list (link
External links
- pelvis at The Anatomy Lesson by Wesley Norman (Georgetown University) (medialpelvissmall, malepelvissagittalinlet&outletsml)
