The American text-book of obstetrics for practitioners and students . Fig. 9.—Effect of different inclinations ofthe pubis upon the relationship between thetrue and the diagonal conjugate diameter(Ribemont-Dessaignes). Fig. 10.—Effect of different thicknesses of the sym-physis upon the relationship between the true and thediagonal conjugate diameter (Ribemont-Dessaignes). pelvimeter. This distance is the diagonal conjugate. By the observation of I) YSTOCIA 29 many subjects, alive and dead, an agreement bag been reached thai l| centi-meters should be subtracted from the diagonal conjugate to ob
The American text-book of obstetrics for practitioners and students . Fig. 9.—Effect of different inclinations ofthe pubis upon the relationship between thetrue and the diagonal conjugate diameter(Ribemont-Dessaignes). Fig. 10.—Effect of different thicknesses of the sym-physis upon the relationship between the true and thediagonal conjugate diameter (Ribemont-Dessaignes). pelvimeter. This distance is the diagonal conjugate. By the observation of I) YSTOCIA 29 many subjects, alive and dead, an agreement bag been reached thai l| centi-meters should be subtracted from the diagonal conjugate to obtain the true l&ii+n | j£#t conjugate diameter. Hut the acceptanceof this average difference depends upon :inormal height of the symphysis, 1 centi-. 11.—Effect of different heights of the promontory upon tin1 relationship between tb true and the diagonal conjugate (Rihemont-Des-saignes). Pig. 12.—Effect of different tn-i-^lit> of the sym-physis upon ill- relationship between the trueind tin diagonal conjugate diameter (Ril ?ties). meters, a normal angle between the axis of the pubis and the true con-jugate, 10o°, a normal thickness of the symphysis, and a normal heigh: ofthe promontory (Figs. 9—13).These factors, however, are notconstant, and if they vary muchfrom the normal the most skilfuland most experienced obstetricianmay he woefully misled in hisestimation of the true writer has had under his carea rachitic dwarf in whom therewas more than 3 centimeters dif-ference between the diagonal andtrue conjugates, and Pershingfound among 90 pelves in themuseums of Philadelphia a dif-ference varying from centi-meter to centimeters. Tt is Fig. 13, Effeci of the lessened slanl outward of thedeclared t
Size: 1922px × 1300px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectobstetrics, bookyear1
