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.

    17/260 page 5
    The brim formed by the ileo-pectineal lines and the angle of union between the sacrum and lumbar vertebrae is somewhat elliptical in shape, the regu- larity of the figure being interrupted behind by the projection of the promontory or base of the sacrum. The dimensions of this aperture are measured by four lines passing through its centre : the longest of these, passing from side to side, and denomi- nated the transverse diameter, is usually about five inches and a quarter in length; the shortest, being that drawn from the centre of the base of the sacrum to the symphysis pubis, and termed the antero-posterior, or conjugate diameter, measures in the standard female pelvis four inches and a quarter. The two remaining lines, called the ob- lique diameters, are those stretching from the sacro-iliac articulation on one side, to the back of the acetabulum on the other. The length of each of these is commonly five inches. By many au- thors the last diameter is mentioned as the longest, a mistake' arising from the circumstance of its actually being so in the recent pelvis; the length of the transverse diameter being then somewhat diminished by the prominence of the psose muscles and great vessels and nerves. The (Mtlet, or inferior aperture, presents in the dry preparation an extremely irregular figure, its margin being interrupted by three deep triangular notches; viz. the two sciatic, and that between the rami of the pubes. In the recent subject,
    No text description is available for this image
    No text description is available for this image
    No text description is available for this image