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.

    38/328 page 22
    In a great majority of cases the head is the presenting part; and we shall, therefore, first ex- amine the mechanism of its transmission. Some varieties occm' as to the j)ositio?i in Avhich the head enters the brim of the pelvis; and of these, French authors have, with their usual in- genuity, taken advantage, and confused the sub- ject by at least seven subdivisions. For practical ptu'poses, however, such minuteness is unne- cessary, and satisfactory notions upon the sub- ject may be conveyed by explanations of three varieties. In the first and most common, the head enters the brim of the pelvis with the sagittal suture in the direction of either of its oblique diameters, and the posterior fontanelle applied to the back part of either acetabulum. In the second, the sagittal suture is still in the same direction, but the posterior fontanelle is applied to either sacro-iliac synchondrosis. In this variety the head occasionally, but rarely, is expelled with the face toward the pubis. In the third variety the face is the presenting part. In the first position, then, the head enters the brim of the pehas with its posterior fontanelle directed toward either acetabulum (generally to the left), and the forehead directed toward either sacro-iliac synchondrosis (generally to the right). The presenting part, or that which we may touch most readily upon introducing a finger into the
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