. Röntgen ray diagnosis and therapy . sion canbe drawn as to possible injuries of the intrapelvic organs. Ifstructural details are wanted, the use of the diaphragm is indis-pensable. If the authors diaphragm is used, its centre must be 4inches below the umbilicus. The iliac arteries show markedly incase of calcareous degeneration. In exstrophy of the bladder skiagraphing may succeed in dem-onstrating the extent of the symphyseal gap, and furthermore theresult of a plastic operation. Congenital Dislocation of the Hip.—In the treatment of con-genital dislocation of the hip skiagraphic evidence w
. Röntgen ray diagnosis and therapy . sion canbe drawn as to possible injuries of the intrapelvic organs. Ifstructural details are wanted, the use of the diaphragm is indis-pensable. If the authors diaphragm is used, its centre must be 4inches below the umbilicus. The iliac arteries show markedly incase of calcareous degeneration. In exstrophy of the bladder skiagraphing may succeed in dem-onstrating the extent of the symphyseal gap, and furthermore theresult of a plastic operation. Congenital Dislocation of the Hip.—In the treatment of con-genital dislocation of the hip skiagraphic evidence will influence142 PELVIS AND LOWER EXTREMITY 143 the plan of treatment. The position of the femoral head and thesize and shape of the acetabulum are well recognised. If the condi-tion of the acetabulum is unfavourable, bloodless reduction shouldnot be attempted, and a cutting operation must be performed. The skiagraph also shows whether reduction of a dislocated hiphas been successfully effected or not. It is true that after perfect. Pig. 95.—Congenital Dislocation of Both Hips in a Gikl of Two and a Half Years. reduction the head of the femur can be felt between the spine andthe symphysis in the majority of cases, and also that the charac-teristic noise can be perceived while the head is sliding over themargin of the acetabulum. But, on the other hand, it cannot bedenied that the noise is often indistinct, and that the thicknessof the muscles ofttimes impairs our judgment, so that it is theskiagraph that gives indisputable information. Fig. 95 shows 144 THE RONTGEN RAYS congenital dislocation of both hips in a girl of two and a half skiagraph proves the moderate extent of the dislocation, which
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