A treatise on orthopedic surgery . CONGENITAL DISLOCATION OF HIP AND COXA VABA. 543 SO that the anterior superior sj^ine lies at a lower level and inadvance of that of the opposite side (Figs. 351 and 352). At an early age the shortening of the limb, due to the eleva-tion of the trochanter, is from one-half to three-quarters of aninch. In later childhood the elevation is from one and one-halfto two inches, anddn adult life it may be considerably more. Fig. Bilateral congenital dislocation of the hip, showing the exaggerated lordosis. The effect of the displacement is also shown by a flat
A treatise on orthopedic surgery . CONGENITAL DISLOCATION OF HIP AND COXA VABA. 543 SO that the anterior superior sj^ine lies at a lower level and inadvance of that of the opposite side (Figs. 351 and 352). At an early age the shortening of the limb, due to the eleva-tion of the trochanter, is from one-half to three-quarters of aninch. In later childhood the elevation is from one and one-halfto two inches, anddn adult life it may be considerably more. Fig. Bilateral congenital dislocation of the hip, showing the exaggerated lordosis. The effect of the displacement is also shown by a flattening ofthe huttock, and usually the elevated and prominent trochantermay be seen as an abnormal lateral projection, on a level withthe anterior superior spine, which is, as has been stated, some-what tilted downward. 544 OETHOPEDIC SUEGEBY. In infancy motion in the false joint is more free than normal,and the abnormal mobility can be demonstrated by alternatetraction and npward pressure on the limb, but as the femur be-comes larger and the upward displacement increases the mo-bility is restricted. The range of abduction is much diminished,and in extreme cases the limb may become permanently ad-ducted and flexed, thus adding the apparent shortening of ad-duction to that caused by the dislocation (Fig. 355). Bilateral Dislocation^—In bilateral dislocation the shorteningof the limbs is, as a rule, equal or nearly so, and if, as is usual,both femora are
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