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.

    32/260 page 20
    CHAP. III. MECHANISM OF PARTURITION. We have now to consider the modes in which nature essays to accomplish the transit of the ma- ture foetus through the bony canal of the pelvis, and shall find, that of these there are three grand varieties; viz. presentations of the head ; of the breech or lower limbs; and of the upper limbs, or side of the body. In either of the two first varieties the foetus presents an extremity of its long axis, and a brief consideration of the various measurements and characters described in the last chapter, will be sufficient to explain, that in ordinary cases no material obstacle to its passage can exist. In the third variety, the side of the child presenting, the long axis lies transversely to the pelvic aperture, and can only be expelled under peculiar circum- stances (afterwards to be explained), to the pro- duction of which nature unassisted is rarely competent. In a great majority of cases the head is the presenting part; and we shall, therefore, first examine the mechanism of its transmission. Some varieties exist as to the position in which the head enters the brim of the pelvis; and of
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