A textbook of obstetrics . iagonal conjugate diameter (Ribemont-Dessaignes). increase in the conjugatosymphyseal angle add half the numberof millimeters to the sum to be subtracted from the diagonalconjugate, and vice versa ; also, for every centimeter increasein the height of the symphysis over the normal add centi-meter to the sum to be subtracted from the diagonal conjugate,and vice versa. While these rules are admirable for the studyof the dried specimen in a museum, they are not easily appliedto the living pregnant female. The height of the symphysiscan be measured in the living s
A textbook of obstetrics . iagonal conjugate diameter (Ribemont-Dessaignes). increase in the conjugatosymphyseal angle add half the numberof millimeters to the sum to be subtracted from the diagonalconjugate, and vice versa ; also, for every centimeter increasein the height of the symphysis over the normal add centi-meter to the sum to be subtracted from the diagonal conjugate,and vice versa. While these rules are admirable for the studyof the dried specimen in a museum, they are not easily appliedto the living pregnant female. The height of the symphysiscan be measured in the living subject, but an allowance forvariations in this respect eliminates error in only a small propor-tion of cases. The variations in the angle of the symphysis, amuch more important source of error, can only be cases upon the border-line between the relative and absolute 4i6 THE PATHOLOGY OF LABOR. indications for Cesarean section in which the difference of acentimeter would decide one for or against the operation I. Fig. 272.—Effect of different thicknesses of the symphysis upon the relationshipbetween the true and the diagonal conjugate diameter (Kibemont-Dessaignes).
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Keywords: ., bookcentury1800, bookdecade1890, bookidtex, booksubjectobstetrics
