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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    ward into the occipital bone. At the junction of the lambdoid and sagittal sutures, owing to the non-ossification of the occipital and parietal bones, a triangular space is left, closed only by cartilage, and called the lesser or posterior fontanelle, A similar but larger space occurs between the pa- rietal and frontal bones, at the intersection of the coronal and sagittal sutures. This is termed the greater or anterior fontanelle, and is distinguish- able by being lozenge-shaped, and having four concurrent sutures, while the former is triangular, and has only three concurrent sutures. A know- ledge of the differences between these fontanelles may sometimes assist us in a diagnosis of the situation of the head during labour. We shall now enquire into the dimensions of the standard foetal head, which are usually mea- sured by lines, somewhat loosely denominated diameters. The shortest of these is the bi-parietal, or that stretched between the tuberosities of the parietal bones on either side, and is about three inches and a half, or three inches and a quarter in length ; this, it is plain, can meet with no obstruction in passing through any part of the standard pelvis, the shortest diameter of the latter being nowhere less than four inches. There are, however, three other measurements to be considered, which, from being all in the long axis of the head, are usually called the long
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