The Dublin practice of midwifery / By Henry Maunsell.

  • Henry Maunsell
Date:
1834
Catalogue details

Licence: Public Domain Mark

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

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    is, by the same motion, passed backwards towards the sacro-iliac synchondrosis of its own side. . In this 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 observed it to occur in ninety-three 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 pubis. 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 directly backwards, w'hich, I believe, never occurs, except in the case of a very small head. Third position^ or face presentation. — In tliis variety the face usually enters the brim of the pelvis with the forehead toward one sacro-iliac synchondrosis (generally the left), and the chin toward the opposite acetabulum (generally the right). The presenting part, then, is the upper portion of one cheek. As the labour advances,
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