A treatise on the science and practice of midwifery . ng with the regular shape of the deformed is often the result of a lateral flexion of the spinal column depend-ing on the rachitic diathesis, and when well marked is known as thescolio-rachitic pelvis (Fig. 130), in which one side of the pelvis, thatcorresponding to the direction of the pelvic curve, is asymmetrical andcontracted, the ilio-pectineal line being sharply curved inward about thesite of the sacro-iliac synchondrosis, the symphysis pubis being displacedtoward the opposite side. A somewhat similar but much less markeduni
A treatise on the science and practice of midwifery . ng with the regular shape of the deformed is often the result of a lateral flexion of the spinal column depend-ing on the rachitic diathesis, and when well marked is known as thescolio-rachitic pelvis (Fig. 130), in which one side of the pelvis, thatcorresponding to the direction of the pelvic curve, is asymmetrical andcontracted, the ilio-pectineal line being sharply curved inward about thesite of the sacro-iliac synchondrosis, the symphysis pubis being displacedtoward the opposite side. A somewhat similar but much less markedunilateral asymmetry may exist in cases of scoliosis [*] unconnected withrickets, but rarely to a sufficient degree to interfere materially withlabor. Cavity of the Pelvis is generally not Affected.—In most cases of this kindthe cavity of the pelvis is not diminished in size, and is often even morethan usually wide. The constant pressure on the ischia which the sittingposture of the child entails tends to force them apart, and also to widen Fig. Rickety Pelvis with Backward Depression of the Symphysis Pubis. the pubic arch. Considerable advantage results from this in cases inwhich we have to have perform obstetric operations, as it gives plentyof room for manipulation. Figure-of-Eight Deformity.—In a few exceptional cases the narrowingof the conjugate diameter is increased by a backward depression of thesymphysis pubis, which gives the pelvic brim a sort of figure-of-eightshape (Fig. 131). The most reasonable explanation of this peculiarity \} Although hunchbacks frequently have well-formed pelves, it is not uncommon tofind a deformed spine associated with an asymmetrical pelvis or even a much contractedone. Spinal distortion from caries, especially in the lumbar region, is thus associated,and the pelvic deformity will be increased if there has been coxalgia, either double orsingle, or if from any cause one leg should be shorter than the other. In the recordsof the Porro
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectobstetrics, bookyear1
