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.

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    parietal bones, the head, as in the first position, descending obhquely into the pelvis. As the force of the uterus continues to act upon the head, the round and bulky vertex and tuberosity of one parietal bone are directed against the inclined plane formed by one of the spines of the ischia, and by it guided forwards toward the neighbouring ace- tabulum, while the less bulky but smooth forehead is, by the same motion, passed backwards toward the sacro-iliac synchondrosis of its own side. In tliis situation the head is expelled, the case being, in fact, converted into one of the first position. This, I' believe, is the usual course; Professor Nagele of Heidelberg obsen^ed it to occur in ninety-tlu'ce out of ninety-six cases. In some few instances, however, the vertex, instead of being directed forwards, as has been described above, is turned toward the sacrum, and the upper and fore part of one of the parietals passes out first under the arch of the pubis, con- stituting a presentation with the face to the jnibis. This is a less favourable position than the first, as the head passes, not flexed, but extended upon the trunk; and, consequently, the moving dia- meter is the second longest, being that between the lower part of the forehead and the upper part of the occiput. It is said by some, that the head occasionally presents at the brim with the fore- head directly toward the pubis, and the vertex
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