The practice of obstetrics, designed for the use of students and practitioners of medicine . , in the L. 0. A. position the suboccipito-bregmatic circumference or planeforms the base of a cone, the apex of which is the posterior superior angle of theright parietal bone. This explains the situation of the caput succedaneum andof a cephalhematoma. In ordinary cases deformity from moulding disappears inone or two days, and in the more pronounced cases in two to four days. In casesof contracted pelves with excessive moulding of the head, permanent deformitymay result which perhaps can be pos
The practice of obstetrics, designed for the use of students and practitioners of medicine . , in the L. 0. A. position the suboccipito-bregmatic circumference or planeforms the base of a cone, the apex of which is the posterior superior angle of theright parietal bone. This explains the situation of the caput succedaneum andof a cephalhematoma. In ordinary cases deformity from moulding disappears inone or two days, and in the more pronounced cases in two to four days. In casesof contracted pelves with excessive moulding of the head, permanent deformitymay result which perhaps can be positively determined only by taking a cast ofthe head, as measurements are misleading and unreliable. The Capitt Succedaneum.—The change in the shape of the head produced bymoulding is still further modified by a swelling on that portion of the presentingpart which is least subjected to pressure from the canal, due to venous hyperemiaand oedema, and termed the caput succedaneum. (See Part IX.) In the L. O. the caput forms upon the posterior superior angle of the right parietal. (96-9a?i) Fig. 577.—Diagram showing the Relative FrequencyOF THE Positions of Vertex Presentation. VERTEX PRESENTATION. 453 bone, encroaching somewhat upon the small fontanelle and occipital bone (). Wrinkling of the scalp usually precedes the formation of the tumor, andis indicative of commencing pressure. The scalp tumor may form within the bagof membranes before their rupture; after rupture of the membranes while the cer-vix is only partly dilated; and, thirdly, at the vaginal outlet after the head reachesthe pelvic brim. In the first two instances the caput is usually small and of littlepractical importance, but at the vaginal outlet, where it usually forms, it mayattain considerable size, and may enable one after delivery to diagnose the posi-tion the head occupied within the birth canal. While it is true that in normallabor the caput most often formswithin the birth canal, still
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectobstetrics, bookyear1
