A system of obstetrics . metimes be in the trans-verse or in the oblique, or even in the antero-posterior, pelvic diameter,and hence the childs head becomes elongated. This elongation, how-ever, cannot be in the occipito-mental diameter, but rather in thatdescribed by Budin as the maximum diameter, for the squamous por-tion of the occipital bone is pushed under the parietal bones, thismovement being permitted by the cartilaginous connection between itand the basilar portion. So, too, the equally strong compression towhich the head is subjected on all sides compels overriding of thefrontal by t
A system of obstetrics . metimes be in the trans-verse or in the oblique, or even in the antero-posterior, pelvic diameter,and hence the childs head becomes elongated. This elongation, how-ever, cannot be in the occipito-mental diameter, but rather in thatdescribed by Budin as the maximum diameter, for the squamous por-tion of the occipital bone is pushed under the parietal bones, thismovement being permitted by the cartilaginous connection between itand the basilar portion. So, too, the equally strong compression towhich the head is subjected on all sides compels overriding of thefrontal by the parietal bones, while the posterior of the latter overridesthe anterior. The caput suceedaneum is large and long, even in somecases protruding from the vulvar opening while the head is in thecavity. Anterior rotation of the head does not occur, but the occiputpasses out over the perineum. From the head remaining so long at the pelvic brim while stronguterine contractions are going on, there is danger of injury to some. 730 ANOMALIES OF THE FORCES IN LABOR. portions of the lower uterine segment, resulting in subsequent inflam-mation, or actual perforation by long-continued attrition may , too, exhaustion may come on to such degree that the life of themother is imperilled, the uterus falling into a state of atony. The longcontinuance of the labor carries danger to the foetus, and so too injurymay result from the strong compression of the foetal head. Delay in rupture of the membranes until the os is fully dilated,descent of the occiput rather than of any other part of the foetus,moderate size of the foetus, yielding character of the bones of thehead, and on the part of the mother a slight degree of pelvic con-traction and vigorous uterine and voluntary action, are to be regardedas propitious, the labor under these circumstances usually terminatingfavorably for both mother and child. On the other hand, early rupture of the membranes, great sizeof the child, unyielding
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectobstetrics, bookyear1
