A textbook of obstetrics . Fig. 344-- Same case as figure 343. ANOMALIES IN THE FORCES 01 LABOR, 477 ward, backward, and inward, on account of the pressure of thefemur, the weight of the body being received mainly upon the sound leg. This form of coxalgic pelvis, as a rule, presents noserious obstacle to delivery unless it is associated with a rachiticdeformity (Fig. 345). Special attention, however, should alwaysbe paid to the length of the conjugate diameter of the inlet,and to the transverse diameter of the outlet. In the othervariety of coxalgic pelvis the deformity is also an oblique con-
A textbook of obstetrics . Fig. 344-- Same case as figure 343. ANOMALIES IN THE FORCES 01 LABOR, 477 ward, backward, and inward, on account of the pressure of thefemur, the weight of the body being received mainly upon the sound leg. This form of coxalgic pelvis, as a rule, presents noserious obstacle to delivery unless it is associated with a rachiticdeformity (Fig. 345). Special attention, however, should alwaysbe paid to the length of the conjugate diameter of the inlet,and to the transverse diameter of the outlet. In the othervariety of coxalgic pelvis the deformity is also an oblique con-traction, but it is the bone on the diseased side which is driveninward upon the pelvic canal. This displacement of the innomi-nate bone is the result of an arrested development on the corre-sponding side of the pelvis, and is usually associated with anatrophy of the sacral ala and an ankylosis of the sacro-iliac contraction of the pelvic canal is much more serious in this. Fig. 345.—Coxalgic pelvis (Mutter Museum, College of Physicians, Philadelphia). form, and there may be all the difficulties in labor encounteredin the true Xaegele pelvis. Luxation of the Femora.—Dislocation of the thigh-bones, ifcongenital or occurring early in childhood and not corrected,has some effect upon the size and shape of the pelvis, but usuallynot enough seriously to obstruct labor. If one thigh is dislo-cated, the weight of the body may be thrown mainly upon theother leg, and this may produce an oblique contraction of thepelvis of the kind already described. If the thigh-bone isdisplaced forward, the anterior half of the pelvis may bedriven in a little upon the pelvic canal, and the head of the thigh-bone, as in one case reported, may project over the horizontalramus of the pubis into the pelvic inlet (Fig. 346). In the con-genital luxation of both femora backward upon the iliac bonesthere is an excessive rotation forward of the sacrum, an increasedwidth of the pelvic
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Keywords: ., bookcentury1800, bookdecade1890, bookidtex, booksubjectobstetrics
