A treatise on the science and practice of midwifery . it. Theresult is a rotation of the childs pelvis, so that its transverse diameter PELVIC PRESENTATIONS. 303 comes to lie approximately in the antero-posterior diameter of the out-let ; its antero-posterior diameter corresponds to the transverse diameterof the mothers pelvis, the left hip lies behind the pubes, and the righttoward the sacrum. This rotation, which is admitted by the majorityof obstetricians, is altogether denied by Xaegele. There can be nodoubt, however, that it does generally take place, but by no means soconstantly as the c
A treatise on the science and practice of midwifery . it. Theresult is a rotation of the childs pelvis, so that its transverse diameter PELVIC PRESENTATIONS. 303 comes to lie approximately in the antero-posterior diameter of the out-let ; its antero-posterior diameter corresponds to the transverse diameterof the mothers pelvis, the left hip lies behind the pubes, and the righttoward the sacrum. This rotation, which is admitted by the majorityof obstetricians, is altogether denied by Xaegele. There can be nodoubt, however, that it does generally take place, but by no means soconstantly as the corresponding rotation of the vertex; and it is notuncommon for it to be entirely absent and for the hips to be born in theoblique diameter of the outlet. The body of the child is said frequentlynot to follow the movement imparted to the hips, so that there is moreor less of a twist in the vertebral column. Expulsion of the Hips and Body.—The left hip now becomes firmlyfixed behind the pubes, and a movement of extension, analogous to that Fig. First, or Left Saero-anterior, Position of the Breech. of the head in vertex presentations, takes place. The right, or posterior,hip revolves round the fixed one, gradually distends the perineum, andis expelled first, the left hip rapidly following. As soon as both hipsare born t\\i\ feet slip out, unless the legs are completely extended uponthe childs abdomen. The shoulders soon follow, lying in the left obliquediameter of the pelvis (Fig. 110). The left shoulder rotates forwardbehind the pnbes, where it becomes fixed, the right shoulder sweepingover the perineum and being born first. The arms of the child aregenerally found placed upon its thorax, and are born before the they are extended over the childs head, thus causing consid-erable delay and greatly increasing the risk to the child. It is now gen-erally admitted that such extension is most apt to occur when tractionhas been made on the childs body with th
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectobstetrics, bookyear1
