Abstract
In recent years, accurate diagnosis of the fetal condition has become possible due to the progress of medical electronics (ME), while the forecast concerning the progress of delivery is difficult in many cases because there are no standards for the evaluation of the birth canal. This time, we re-evaluated the factors affecting the progress of the delivery on the basis of the measured values and the shape of the pelvis.
1) The measurement of the pelvis alone did not permit evaluation of the progress of delivery and choice of the delivery method.
2) The shortest anterior and posterior diameter rather than the true obstetric conjugate appeared to reflect the cephalopelvic disproportion (CPD).
3) The cesarean section was carried out in the cases of “interlocking” detemined by the inlet-space method.
4) Abnormalities of sacral shape were noted in some cases of cesarean section, where the measured values of the pelvis were judged to be normal.
From the results described above, sacral shape is largely involved in the progress of the delivery, and preparation of the diagnostic standard for CPD including sacral shape should be made in the future.
