A theoretical and practical treatise on midwifery : including the diseases of pregnancy and parturition and the attentions required by the child from birth to the period of weaning . d it may exist on one, or bothsides at the same time. This deformity consists, essentially, in the flattening, orinward projection of the coxal bone, at the part corresponding to the cotyloidcavity, and to the junction of its three constituent pieces; whence there resultsat this point a greater or less diminution of the curve which the pelvic circum-ference usually describes; and when existing in a high degree, th
A theoretical and practical treatise on midwifery : including the diseases of pregnancy and parturition and the attentions required by the child from birth to the period of weaning . d it may exist on one, or bothsides at the same time. This deformity consists, essentially, in the flattening, orinward projection of the coxal bone, at the part corresponding to the cotyloidcavity, and to the junction of its three constituent pieces; whence there resultsat this point a greater or less diminution of the curve which the pelvic circum-ference usually describes; and when existing in a high degree, the curvature iseven reversed, its convexity being turned towards the sacrum, while, at the sametime, the pubis departs from its normal transverse direction and runs almostdirectly forwards; so that the deformity is produced by the coxal bones havingthen assumed the form of an old italic S, instead of presenting a regular arch. Where this takes place to the same extent on both sides, the pelvis maintainsa degree of symmetry, and the superior strait is shaped like the trefoil leaf; thatis, it presents three lobes, one anteriorly, which corresponds to the more acute 540 angle of the pubis, and two posteriorly and laterally, formed by the union of theiliac bones with the sacrum. But, it far oftener happens that the deformity ismore marked in the coxal bone of one side than upon the other, and then theshape of the pelvis is the more irregular as the deformity of the ossa innominatais greater. Where this double disfiguration of the hip bones exists in a high degree, morep- 83 especially when it affects the ante- rior pelvic wall, it vitiates both theoblique and antero-posterior diame-ters at the same time. In fact,these bones are then approximatedin a parallel manner, being onlyseparated from each other by aslight distance, for the extent of aninch or two, while the rest of thepelvis is comparatively regular; andhence, although the symphysis pubismay be at the normal distan
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Keywords: ., boo, bookcentury1800, booksubjectmidwifery, booksubjectobstetrics
