. An American text-book of obstetrics. For practitioners and students. Fig. 288.—Spontaneous evolution, second and rareform of mechanism, known as birth with double body(one-sixth natural size, redrawn from Kiistner). Fig. 289.—Frozen section of shoulder presen-tation (Chiara): the distortion and the elonga-tion of the neck are noteworthy. frequent occurrence of a prolapsed arm, and in the method of raising animpacted shoulder. In raising the shoulder it is necessary to remember the mechanism of themethod by which nature deals with a neglected transverse presentation—thatof spontaneous evoluti
. An American text-book of obstetrics. For practitioners and students. Fig. 288.—Spontaneous evolution, second and rareform of mechanism, known as birth with double body(one-sixth natural size, redrawn from Kiistner). Fig. 289.—Frozen section of shoulder presen-tation (Chiara): the distortion and the elonga-tion of the neck are noteworthy. frequent occurrence of a prolapsed arm, and in the method of raising animpacted shoulder. In raising the shoulder it is necessary to remember the mechanism of themethod by which nature deals with a neglected transverse presentation—thatof spontaneous evolution. In this process, as has been said, the trunk entersthe pelvis at the brim in an oblique diameter, but as it is forced farther downthe shoulder rotates to the front aud becomes fixed there, while the thoraxaud the abdomen are crowded into the posterior portion of the pelvis byflexion upon themselves (Fig. 287). Now, so long as the position is stilloblique, and if flexion of the trunk has not begun, the presenting part mayeasily be raised by pressure upon th
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectobstetrics, bookyear1
