A textbook of obstetrics . Fig. 5.—The inclination of the pelvis. pelvic deformities of rachitis, lordosis, kyphosis, spondylolis-thesis, and osteomalacia ; some of the anomalies of labor inthese pelvic deformities ; and the abnormal relations of the ex-. Fig. 6.—Variation in sacral curves: /, Promontory of sacrum; C, coccyx. Tracings of sacra in the authors possession. \ 24 PREGNANCY. ternal genitalia to the pelvis, whenever the latter shows anexcessive or deficient inclination. Pelvic Direction.—By this term is meant the direction of thepelvic canal. It was the custom in a former generation
A textbook of obstetrics . Fig. 5.—The inclination of the pelvis. pelvic deformities of rachitis, lordosis, kyphosis, spondylolis-thesis, and osteomalacia ; some of the anomalies of labor inthese pelvic deformities ; and the abnormal relations of the ex-. Fig. 6.—Variation in sacral curves: /, Promontory of sacrum; C, coccyx. Tracings of sacra in the authors possession. \ 24 PREGNANCY. ternal genitalia to the pelvis, whenever the latter shows anexcessive or deficient inclination. Pelvic Direction.—By this term is meant the direction of thepelvic canal. It was the custom in a former generation toexpress pelvic direction by an exceedingly complicated mathe-matical formula, yielding what was called the curve of Cams.*Not only is this formula unnecessarily complicated, but it is alsoincorrect. The direction of the pelvic canal depends entirelyupon the curve of the sacrum, and this differs in every , at random, any half-dozen or so of sacra from my col-lection, the utmost diversity of curvature is seen. The directionof the pelvis may be described with approximate accuracy as aline parallel with the sacral curve, and equally distant at allpoints from the pelvic walls. The Development of the Pelvis.—It may be easier to unde
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Keywords: ., bookcentury1800, bookdecade1890, bookidtex, booksubjectobstetrics
