The principles of midwifery; including the diseases of women and children / [John Burns].

  • Burns, John, 1774-1850.
Date:
1809
Catalogue details

Licence: Public Domain Mark

Credit: The principles of midwifery; including the diseases of women and children / [John Burns]. Source: Wellcome Collection.

    46/554 (page 18)
    % brim of the pelvis has no regular shape, but approach.es nearer the oval than any other. The short diameter of this extends from the symphysis of the pubis to the top of the sacrum. This has been called the conjugate, or antero-posterior diameter, and measures four inches. The lateral diameter measures five inches and a quar- ter; and the diagonal diameter, or a line draAvn from the sacro-iliac symphysis to the opposite acetabulum, mea- sures five inches and an eighth; but as the pso3e mus- cles, and iliac vessels, overhang the brim a very little at the side, the diagonal diameter in the recent sub- ject appears to be the longest. From the sacro-iliac sym- physis to the crest of the pubis, on the same side, is four inches and a half. From the top of the sacrum, to that part of the brim which is directly above the foramen thyroideum, is three inches and a half. The line, if drawn to the acetabulum, in place of the fora- men, is a quarter of an inch shorter; a line drawn a- cross the fore part of the brim, from one acetabulum to another, is nearly four inches and a quarter. The outlet of the pelvis is not so regular as the brim, in its shape, even when the soft parts remain; but it is somewhat oval. The long diameter extends -from the symphysis pubis to the coccyx, and measures, when that bone is pushed, back, as in labour, five inches, but an inch less when it is not. The transverse diameter, from the one tuberosity of the ischium to the other, measures four inches. The outlet of the pelvis differs materially from the brim, in this respect, that its margins are not all on the same level; an oval wire will represent the L-im, but, if applied to the outlet, it must be curved. i'..e *a.det. from the symphysis pubis to the tuberosity of the ischium, is semioval; but behind, it becomes more irregular, and bends upwards and backwards. The arch of the pubis, or the fore part of the outlet, is four inches broad at its base; and a perpendicular line, dropped from its centre to the bone, is fully two inches long. The top