The practice of obstetrics, designed for the use of students and practitioners of medicine . is the head is less flexed,being semi-extended. The two fon-tanelles are on the same level. Thehead becomes tilted in normal casesso that the sagittal suture lies nearerthe promontory of the sacrum. Thisis called Naegeles obliquity. (Pages518.) In flat rachitic pelves this isaccentuated and the sagittal suturelies in front of the sacrum and theparietal bone presents—anterior par-ietal presentation. This increases tillfinally the ear is left behind the sym-physis pubis. Then rotation takes place, causin
The practice of obstetrics, designed for the use of students and practitioners of medicine . is the head is less flexed,being semi-extended. The two fon-tanelles are on the same level. Thehead becomes tilted in normal casesso that the sagittal suture lies nearerthe promontory of the sacrum. Thisis called Naegeles obliquity. (Pages518.) In flat rachitic pelves this isaccentuated and the sagittal suturelies in front of the sacrum and theparietal bone presents—anterior par-ietal presentation. This increases tillfinally the ear is left behind the sym-physis pubis. Then rotation takes place, causing the sagittal suture to leave the sacrum. In a few casesthe sagittal suture is anterior. The complication is then more serious, asthe head becomes wedged above the symphysis pubis. Whenever the twofontanelles are felt equally, a flat rachitic pelvis may be suspected. Afterthe head has passed the superior strait the mechanism of labor is by the posterior parietal bone is serious because the head iswedged on the symphysis pubis. The child cannot be bom Fig. 842.^ RachiticPelvis.—(.4ntliors collection.) 634 PATHOLOGICAL LABOR. Great pressure is exerted on the posterior parietal bone by the sacrum, causing adepression in the bone. Sometimes this depression is spoon-shaped. It is quitelikely that the brain has been injured. By palpation only a vague idea of thesize of the head can be obtained. (3) The generally equally contracted rachiticpelvis: It is chiefly characterized by arrested development (Figs. 840,841). It entails contraction of the transverse diameter such as is seen inthe fetal pelvis. This form is very rare and it leaves the shape of thepelvic brim little changed from normal, since the ravages of the diseasehave done their work at such an early age that the child did not sit upor walk till recovery had taken place. Consequently the processes whichserve to change the shape of the pelvis when disease offers the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectobstetrics, bookyear1
