. A system of midwifery, including the diseases of pregnancy and the puerperal state. inches, and that a linedrawn from the tip of thecoccyx to the lowest partof the symphysis, formedwith the horizon at b anangle which varies greatly,but which may be stated, asan average, at about 11°.In reference to this, however,it must be borne in mind,that the recession of thecoccyx implies a movementdownwards as well as back-wards, and that, conse-quently, this angle will berendered still more acuteduring the passage of the child. The axis of the brim of the pelvis,then, is a line, c d, which passes upwar
. A system of midwifery, including the diseases of pregnancy and the puerperal state. inches, and that a linedrawn from the tip of thecoccyx to the lowest partof the symphysis, formedwith the horizon at b anangle which varies greatly,but which may be stated, asan average, at about 11°.In reference to this, however,it must be borne in mind,that the recession of thecoccyx implies a movementdownwards as well as back-wards, and that, conse-quently, this angle will berendered still more acuteduring the passage of the child. The axis of the brim of the pelvis,then, is a line, c d, which passes upwards and strongly forwards, whilethat of the bony outlet is directed downwards and slightly axis of the cavity is usually described as the perpendicular of aline drawn from the middle of the symphysis pubis to the centre of thesacro-coccygeal \« Diagram showing the inclination and axis of thetrue pelvis. Das Weibliche Becken, etc. Carlsruhe. 1825. 42 THE PELVIS. [CHAP. Fig. 14. Axis of the True Pelvis.—If the bony pelvis were a simple cylinder,the demonstration of its axis would be a very simple matter. All thatwould then be necessary would be to make a section, perpendicular toits walls, when the axis of the cavity would be shown to be a line inter-secting the plane represented by this section, and equidistant from everypart of the cylinder wall. The same simplicity of description will not,however, suffice in the case of the irregular and curved pelvic is known as the curve of Carus was at one time generallysupposed to represent the axis of the pelvis. This curve is describedin the following manner: The compasses are opened to the extent of2J inches: one point is placed upon the central point of the posteriorsurface of the symphysis, while with the other a curve is drawn fromthe plane of the brim to the p
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectobstetrics, bookyear1
