The principles and practice of obstetrics . Fig. 59 in Cavity of position of Vertexat Superior Strait T Sinclair s Ink Pruia OCCIPITO-SACRAL POSITION. 165 has also observed three cases, and Dr. Meigs two cause of this infrequency depends upon the greatconvexity of the occiput, which, when applied to thepromontory of the sacrum and to the lumbar vertebrae,will be very readily turned off from the spine to theright, converting it into a fourth position, or to theleft, converting it into a fifth position. Hence, althoughthis position may sometimes be observed at the com-mencemen
The principles and practice of obstetrics . Fig. 59 in Cavity of position of Vertexat Superior Strait T Sinclair s Ink Pruia OCCIPITO-SACRAL POSITION. 165 has also observed three cases, and Dr. Meigs two cause of this infrequency depends upon the greatconvexity of the occiput, which, when applied to thepromontory of the sacrum and to the lumbar vertebrae,will be very readily turned off from the spine to theright, converting it into a fourth position, or to theleft, converting it into a fifth position. Hence, althoughthis position may sometimes be observed at the com-mencement of labor, it usually disappears when thecontractions become powerful; still, however, it is occa-sionally persistent, and its mechanism, therefore, shouldbe studied. As in the third position, its great peculiarity is, thatthe cervico-bregmatic diameter, when flexion has beenaccomplished, is coincident with the short diameter ofthe superior strait, (Plate X., Fig. 60,) demanding,therefore, more powerful bearing-down efforts to effectits passage; still, when there is a
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Keywords: ., boo, bookcentury1800, booksubjectobstetrics, booksubjectpregnancy
