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

  • John Burns
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.

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    on the cavity of the pelvis, and is placed, with regard to the pubis, still more obliquely than the plane of the ischium. It must, consequently, tend to direct the vertex, as it descends, still more towards the pubis. 5th. Beneath this, the ischium becomes narrower, but not thinner; on the contrary, it is rather thicker, and terminates in a rough bump, called the tuberosity of the ischium. 6th. Next, we look at the anterior part of the bone, and find, that just before the plane of the ischium, there is a large hole in the os innominatum. This is somewhat oval in its shape; and at the upper part within the pelvis, there is a de- pression in the bone, which, if followed by the finger or a probe, leads to the face of the pelvis. The hole is called the foramen thyroldeum. 7th. Before this hole the two ossa innominata join, but form with ^ach other, on the inside, a very obtuse angle, or a kind of smooth rounded surface, on which the bladder partly rests. The junction is called the symphysis of the pubis. 8th. The two bones, where they form the symphysis, are joined with each other for about an inch and a half; then they divaricate^ forming an angle, the limbs of which extend all the way to the tuberosity of the ischium. This separa- tion or divarication Is called the arch of the pubis, which is principally constructed of the anterior boundary of the foramen thyroideum, consisting of a column or piece of bone, about > half an inch broad, and one fourth of an inch thick, formed by the union of the ramus of the pubis, and that of the ischium. * 9th. At the upper part of the symphysis, or a very little from it, the os innominatum has a short obtuse projection, called the crest of the pubis, into which Poupart’s ligament is inserted; and from this there runs down obliquely, a ridge on the outside of the bone, which reaches all the way to the acetabulum, and overhangs the foramen thyroideum. 10th. When we return to the back part of* the os innomi- natum, we find, that just after it has formed the plane of the ischium, it extends backwards to join the sacrum, but in doing so it forms a very considerable notch or curve, the concavity
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