From Wikipedia, the free encyclopedia
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:
In situ
When the ligaments are in situ, the inferior aperture of the pelvis is
lozenge -shaped, bounded as follows:
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
^ Sara Paterson-Brown, Phillip Bennett, Catherine Williamson (2010). Basic Science in Obstetrics and Gynaecology (Fourth Edition) - Obstetric pelvic definitions and dimensions . Elsevier Ltd.
ISBN
978-0-443-10281-3 . {{
cite book }}
: CS1 maint: multiple names: authors list (
link )
External links
General
Ilium
body
wing
gluteal lines iliac spines other:
Ischium
body superior ramus inferior ramus
Pubis
body
superior ramus
inferior ramus
Compound