A textbook of obstetrics . int of thehealthy side is not under centimeters. In twenty forcepsoperations thirteen women died. The proposition ^\ Pinard to 1 The writer i> indebted fr these statistics to Schauta {toe. 438 THE PATHOLOGY OF LABOR. do what he calls ischiopubiotomy has not met with favor. Theroom gained by the movement outward of the innominate boneon the healthy side, the other being, of course, immovable, willbe sufficient only in pelves so slightly contracted as to allow adelivery by much simpler means. Transversely Contracted Pelvis the Result of Imperfect Develop=ment of
A textbook of obstetrics . int of thehealthy side is not under centimeters. In twenty forcepsoperations thirteen women died. The proposition ^\ Pinard to 1 The writer i> indebted fr these statistics to Schauta {toe. 438 THE PATHOLOGY OF LABOR. do what he calls ischiopubiotomy has not met with favor. Theroom gained by the movement outward of the innominate boneon the healthy side, the other being, of course, immovable, willbe sufficient only in pelves so slightly contracted as to allow adelivery by much simpler means. Transversely Contracted Pelvis the Result of Imperfect Develop=ment of Both Sacral Ala;.—This pelvis was first described in 1S42by Robert, and is generally known as the Robert pelvis(Figs. 291 and 292). It is the rarest of all contracted was able to find but six examples recorded in child-bearing women. Ftrruta has recently reported another gives eight as the number of recorded cases. Theanatomical conditions are the same as in the Naegele pelvis, ^f§M^. Fig. 291.—Transversely contractedpelvis, showing contraction at outlet(model in authors collection). Fig. 292.—Transversely contractedpelvis: C. v., 9^ cm.; tr. (outlet), 5cm.; tr. (inlet), 8 cm. (model in Mut-ter Museum, College of Physicians,Philadelphia). except that both sides of the sacrum are affected instead of one.()ther parts of the sacrum besides the alae may show imperfectdevelopment. There is a case reported in which the wholelower portion of the bone was absent. The sacrum in the Robertspelvis is extremely narrow, and the posterior superior spinousprocesses of the iliac bones are brought close together. Thedegree of contraction in the transverse diameter is so extremethat natural labor is out of the question. An asymmetry of theRobert pelvis has been observed, one side showing a greaterdegree of tile deformity than the other, and thus approachingthe type of an obliquely contracted pelvis. The cause of this deformity is an absence of the bony nucleii
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Keywords: ., bookcentury1800, bookdecade1890, bookidtex, booksubjectobstetrics
