レ線学的骨盤形態に関する研究
主として仙骨及び恥骨形態について
1960 年 20 巻 9 号 p. 1091-1112
詳細
1960 年 20 巻 9 号 p. 1091-1112
Employing the method of Guthmann and that of Martius, pelvic pictures were taken on a total of 357 pregnant women. Besides, pubic pictures were taken on 96 non-pregnant women. Measurements on the films thus taken were converted into actual measurements by proportional calculation. Sacral shapes were classified into 5 groups of 14 types and the shapes of pelvic inlet were observed following the clasfication of Caldwell. Morphological and clinical findings thus obtained were subjected to the stochastic disposition. Results obtained were as follows:
1. Arcate sacrum was predominant followed by linear, navicular and second promontory in the order listed.
2. Frequency of the appearance of flat sacrum was 30%, tubif orm pelvis 6.7%, funnel pelvis 16.5% and long pelvis 9.9%. Tubiform pelvis was mostly observed with nevicular sacrum and funnel pelvis with navicular and linear sacrum.
3. Advanced funnel pelvis was often found with the pelvic inlet of platypelloid or anthropoid type in the rear portion of the pelvic inlet.
4. Most of those with relatively narrow public arch angle were found with advanced flat sacrum.
5. Mean of the obstetrical conjugate was from the 11.60 cm for BB type to the 12.69 cm of 6F type.
6. Some of the women possessed navicular or linear sacrum showed a mean of the conjugate of pelvic expansion shorter than the obstetrical conjugate.
7. In the present study, it was difficult to recognize any significant difference between the sacral flatness, long pelvis, tubif orm pelvis, funnel pelvis etc and normal labor, forceps labor, cesarean section etc. Incidences of cearean section and forceps labour, however, were predominant among the women with linear pelvis or second promentory pelvis.
8. Incidence rate of cesarean section was high among the women with obstetrical conjugate less than 10.5 cm and the conjugate of pelvic expansion 11.2cm.
In view of the findings stated above, it is concluded that particular cares should be taken as to the placement of the fetal cranium in the pelvic inlet at the beginning of labor for the women with contracted pelvis, linear sacrum or with second promontory.
