The Dublin practice of midwifery / by Henry Maunsell.

  • Henry Maunsell
Date:
1856
Catalogue details

Licence: Public Domain Mark

Credit: The Dublin practice of midwifery / by Henry Maunsell. Source: Wellcome Collection.

    25/328 page 9
    montory of that bone. Hence it is obvioiis, that what obstetricians mean by the axis of the pelvis must be a mirved line, passing respectively tlnrough the centres of both brim and outlet, and nearly corresponding in its curvatui'c to that of the sacrum. The practical deductions from these facts are, that a body to get into the pelvis through the brim must pass downwards, and hacJavards ; and to get out of it, at the outlet, must proceed downwards and forwards. The foregoing are the chief poiats of obstetric interest in a standard female pelvis. Deviations are occasionally met with, and may consist either in deformity of shape; in deficiency, or in excess of capacity. The most usual cause of deformity of the pelvis is, doubtless, the occmTcnce of rickets dming in- fancy, when the bones, not being possessed of suf- ficient firmness, are pressed from their natural positions by the weight of the trunk and counter- acting resistance of the lower extremities. The same effect is said to be produced, in a similar way, by the disease called inollities ossium; and deformity may also, sometimes, be occasioned by fi'actures,. or the occurrence of exostosis. The contraction of the passage from rickets generally occm's at the brim, and oftener from before backward than in the lateral direction. It, however, may exist in a great variety of forms, and occasionally is so
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