The ischial spines are a landmark for engagement of the fetal head.
Extending from the middle of the posterior rami of the ischial bones are the ischial spines, which are of great obstetrical importance.
If one looks at the pelvis, the ischial spines protrude while the curve of the linea terminalis slides downwards, forward and inward.
The posterior wall of the pelvis is the sacrum, while the lateral walls are formed by the ischial bones, sacrosciatic notches and the pelvic ligaments.
The mid-pelvis is at the level of the ischial spines.
Soft tissue landmarks such as tumour and pelvis structures such as anterior sacrum and anterior ischial tuberosity were the exception with overall mean ratings of 'not clear' or 'not visible'.
The distance between the line connecting the lower poles of the ischial tuberosities and site of abrupt narrowing of contrast material was measured in all 148 patients.
Ischial containment sockets for amputees are issued on the basis of a clinical decision made by the multi-professional team at a national health service trust.
