A System of midwifery : including the diseases of pregnancy and the puerperal state . Malacosteou pelvis. observed, mere modifications of the same condition, and all of whichpartake of the character of elliptical distortion. In malacosteon again,the general characteristic of the deformity is annular, and is due toantero-lateral displacement of the pelvic walls by pressure exercisedupon the acetabula. This is indicated in a typical form by the rostratedvariety shown in Fig. 139, where the conjugate diameter is increasedat the expense of the transverse and oblique. Endless varieties and combinat
A System of midwifery : including the diseases of pregnancy and the puerperal state . Malacosteou pelvis. observed, mere modifications of the same condition, and all of whichpartake of the character of elliptical distortion. In malacosteon again,the general characteristic of the deformity is annular, and is due toantero-lateral displacement of the pelvic walls by pressure exercisedupon the acetabula. This is indicated in a typical form by the rostratedvariety shown in Fig. 139, where the conjugate diameter is increasedat the expense of the transverse and oblique. Endless varieties and combinations of these two may occur, so thatthe distinction between a rickety and a malacosteon pelvis is only to be F13. Isabel Redmans casi accepted with the qualification that some cases partake of the charac-teristics of each. Thus, in the case of Isabel Redman, operated upon XXVII.] VARIETIES. 447 by Dr. Hall, the conjugate and oblique diameters were both involved,constituting a very serious modification of distortion in this are, of course, mere illustrations of possible variations, whichmight be infinitely multiplied; but it is to be remembered that a con-siderable number of cases have been met with in which an undoubtedlyrickety pelvis presented all the more prominent characteristics of mala-costeon deformity. In so far as the true malacosteon pelvis is concerned, it has been wellobserved by Stanley that there is no diminution in the actual circum-ferential measurement of the brim, and that the bones are of theirnatural bulk and proportion, so that if their various doublings wereunfolded the pelvis would be restored to its normal dimensions andform. In rickets, however, this does
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectobstetrics, bookyear1
