. The science and art of midwifery. 130.—Outline of head after delivery, the browpresenting. (Budin.) MECHANISM OF LABOR. 201 of the large fontanelle. The forehead is nearly perpendicular, whilethe parietal and occipital bones form a slope which inclines downwardand backward. The mento-frontal and sub-occipito-frontal diametersare increased, while the distance between the chin and a point in thesagittal suture anterior to the occiput is diminished. These changesimpart to the head a triangular shape. The peculiar formation is ex-plained by the compression of the occiput between the pelvis and t
. The science and art of midwifery. 130.—Outline of head after delivery, the browpresenting. (Budin.) MECHANISM OF LABOR. 201 of the large fontanelle. The forehead is nearly perpendicular, whilethe parietal and occipital bones form a slope which inclines downwardand backward. The mento-frontal and sub-occipito-frontal diametersare increased, while the distance between the chin and a point in thesagittal suture anterior to the occiput is diminished. These changesimpart to the head a triangular shape. The peculiar formation is ex-plained by the compression of the occiput between the pelvis and thedorsal surface of the child, and the compensatory elongation whichtakes place in the direction of the forehead. The prognosis is less favorable than in vertex presentations, but isby no means so sinister as is popularly supposed. Many cases oforiginal brow presentations become converted into face or vertex pres=. Fig. 131.—Brow presentation, subsequently converted into that of the face.* Hospital.) (Maternity entations during the progress of labor; many are delivered spontane-ously or by the aid of the forceps. Craniotomy is rarely called for. Ahlfeld (Die Entstehung Steiss- und Gesichtslagen ) furnishes twenty-six cases in which the result to both mother and child is given. Feitsch (* Klinikder alltaglichen geburtshtilflichen Operationen, p. 46) gives the histories of sevencases, and Budin ( Tete du Foetus, p. 53) the history of one case. In the thirty-four deliveries there were two maternal deaths; in one of the fatal cases coxalgicoblique pelvis existed as a complication. In the other the brow spontaneouslychanged into a face presentation. There were ten spontaneous deliveries, thebrow presenting, with four dead children, but one died previous to labor. Therewere ten cases of spontaneouo delivery in which the brow during delivery be-came converted into either a face or vertex presentation
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Keywords: ., bookcentury1800, bookdecade1890, bookidsci, booksubjectobstetrics
