The principles and practice of obstetrics . y of the childs curve regarding thesymphysis pubis, the convexity the hollow of the sacrum. Theappreciation of these axes is absolutely necessary, in all operationsfor the delivery of the child, whether manual or instrumental; norcan you, for the purpose of extracting the afterbirth, or for anyOther object, attempt to introduce the hand into the uterus withoutsubjecting the patient to the most serious hazard, unless guided byan accurate knowledge of the curves of the pelvis, and the corres-pondence of the uterus with these curves. To this latter poin
The principles and practice of obstetrics . y of the childs curve regarding thesymphysis pubis, the convexity the hollow of the sacrum. Theappreciation of these axes is absolutely necessary, in all operationsfor the delivery of the child, whether manual or instrumental; norcan you, for the purpose of extracting the afterbirth, or for anyOther object, attempt to introduce the hand into the uterus withoutsubjecting the patient to the most serious hazard, unless guided byan accurate knowledge of the curves of the pelvis, and the corres-pondence of the uterus with these curves. To this latter point weshall revert, when discussing the subject of natural labor. 22 THE PRINCIPLES AND PRACTICE OF OBSTETRICS. Varieties of the Human human pelvis presents cer-tain characteristic varieties, depending upon the sex and age of theindividual. The adult female pelvis (Fig. 9), for example, exhibitsa striking contrast with the pelvis of the male. In the first place,the former is wider and shorter ; the crests of the ilia, as also the. Fio. 14. two anterior superior spinous processes, are further apart, whichaffords a greater capacity to the iliac fossa?. The superior andinterior straits likewise present characteristic differences ; the con-tour of the upper strait is larger and more rounded in the female,and the sacro-vertebral prominence is less marked than in the male;the two tuberosities of the ischia are less thick, and are turnedmore outwardly. The sacrum is shorter and more concave, whilethe os coccyx is further from the pubes, which gives a greatercapacity to the inferior strait of the female in its antero-posterior,or cocci-pubic diameter. One of the most striking differencesbetween the pelves of the two sexes is observable in the arrange-ment of the pubic arcade ; in the female it is capacious—in themale (Fig. 10), on the contrary, it is narrow. This arcade, youmust remember, affords passage to the child during its progressthrough the maternal organs. It is imp
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Keywords: ., bookcentury1800, bookdecade1860, bookpubli, booksubjectobstetrics
