Practical midwifery; handbook of treatment . Fig. 77.—Diagrams Illustrating the Difference in the Configuration ofTHE Head when Extracted by Forceps and Version, o. The effect of tractionfrom below in diminishing the biparietal diameter of the after-coming head: 6. theeffect of pressure from above in increasing the biparietal diameter of the fore,coming head. under the influence of the tractions, the ample transverse di-ameter of the pelvis offers no opposition to an increase of theoccipito-frontal diameter of the head, and, a compensatory in-crease in two directions being thus provided for, t
Practical midwifery; handbook of treatment . Fig. 77.—Diagrams Illustrating the Difference in the Configuration ofTHE Head when Extracted by Forceps and Version, o. The effect of tractionfrom below in diminishing the biparietal diameter of the after-coming head: 6. theeffect of pressure from above in increasing the biparietal diameter of the fore,coming head. under the influence of the tractions, the ample transverse di-ameter of the pelvis offers no opposition to an increase of theoccipito-frontal diameter of the head, and, a compensatory in-crease in two directions being thus provided for, the flatteningof the third, which is alone exposed to pressure, is readily accom-plished, and the head passes. On the other hand, when thevertex of the fore-coming head meets the resistance of a flattenedconjugate which is decidedly too small for it. the effect of theintra-uterine pressure ujion the base of the skull is necessarily toshorten the vertical diameters of the head, a decrease which must PATHOLOGY OF LABOR. 255 of course be coii
Size: 1427px × 1751px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectmidwifery, bookyear18
