A system of obstetrics . the forceps fail, nothing is left but craniotomy, and the soonerthis is resorted to the better for the mother. Face Presentations. Complete flexion of the head causes the vertex to present; completeextension of the head causes a face presentation. Face presentationsare not common; they occur once in about 250 cases of labor. The ordinary cause of face presentations is obliquity of the uterus:the vertex strikes on the edge of the strait and is arrested, and the facedescends. Cases are reported where, in post-mortem examinations madeon women dying at full term, the dead
A system of obstetrics . the forceps fail, nothing is left but craniotomy, and the soonerthis is resorted to the better for the mother. Face Presentations. Complete flexion of the head causes the vertex to present; completeextension of the head causes a face presentation. Face presentationsare not common; they occur once in about 250 cases of labor. The ordinary cause of face presentations is obliquity of the uterus:the vertex strikes on the edge of the strait and is arrested, and the facedescends. Cases are reported where, in post-mortem examinations madeon women dying at full term, the dead foetus has been found in the womboffering by its face. I believe that in all such instances the child hasbeen convulsed before or at the moment of its dissolution, and the con-dition of opisthotonos has placed the head so as to cause the face topresent. It seems highly probable that a primitive face presentation ina living child is the result of similar causes; that is, that such a prim- FACE 257. 593. Transverse Position of the Face at the Superior strait. itive face presentation is caused by some attack of convulsions in thefoetus occurring shortly before labor. Mechanism of Labor in Face Presentations. Not to confuse the reader, we will consider in our description of themechanism of labor in face presentations the same number of positionswe studied in vertex presentations; that is, six positions. In three ofthese positions the chin is turned to the anterior part of the pelvis, andwe term them mento-anterior positions. In three the chin is turned tothe posterior part of the pelvis, and we term them mento-posteriorpositions. First Position of Face.—Left Mertio-arUerior Position.—Thechin looks to any part of the left anterior inclined plane. Second Position.—Right Mento-anterior Position.—The chin look-ing to any part of the right anterior inclined plane. Third Position.— The Mento-pubic Position.—The chin at thesymphysis. [.—38 594 MECHAN
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectobstetrics, bookyear1
