. On the theory and practice of midwifery . osition and alteration of thediameter may be effected, two things are necessary, first, that the painsshould continue (with intervals), and, secondly, that the fetal head shouldcorrespond to the size of the pelvis; for if it be too small, it will wantthe due resistance, and may be driven through the pelvis irregularly, andif it be too large, it will not pass at all. bicle is much smaller than that of the pubis. The line falling from the scrobicle to thepubis retires, -whereas in the former figure it is perpendicular. In this figure the per-pendicular
. On the theory and practice of midwifery . osition and alteration of thediameter may be effected, two things are necessary, first, that the painsshould continue (with intervals), and, secondly, that the fetal head shouldcorrespond to the size of the pelvis; for if it be too small, it will wantthe due resistance, and may be driven through the pelvis irregularly, andif it be too large, it will not pass at all. bicle is much smaller than that of the pubis. The line falling from the scrobicle to thepubis retires, -whereas in the former figure it is perpendicular. In this figure the per-pendicular line from the base of the sacrum is far in advance of the upper dorsalvertebrae. The contemplation of these ingenious profiles of the admirable German cannot failto increase the tact and knowledge of the student, to whom the study of them is warmlyrecommended. Here is Wigands Fig. 4, in which is the profile of a woman with a pelvis so deformedas to imply a necessity for the operation of perforation, on account of its vitiated con-Fig. jugate diameter. The angle formed by the back part of the sacrum and spinal columnis much too small. The bend is quite different from the gentle curve seen in the firstprofile. The scrobicle projects very much over the symphysis pubis, as by the lineuniting them may be seen. The horizontal line from the base of the sacrum comes outjust above the navel. The line from the scrobicle to the base of the sacrum, and thatfrom the sacrum to the pubis are not equal—as in the first and more perfect chord line from the promontory to the coccyx retires, and the whole of it is in rearof the upper part of the spinal column. Wigands 5th figure (Fig. 78) represents a pregnant woman, the conjugate diameterof whose superior strait does not exceed one inch or one inch and a half; and which, ac-cording to most of the German accoucheurs, indicates a resort to the Caesarian operation. The belly is quite pendulous over the pudenda. The plane of the st
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Keywords: ., book, bookcentury1800, booksubjectmidwifery, booksubjectpregnancy
