Surgery; its theory and practice . Dislocation on dorsum ilii. Dislocation into sciatic notch.(Coopers Dislocations.) internus winds over the neck of the femur, and is therefore thegreat obstacle to reduction. The capsule is generally torn below,the round ligament ruptured, the gluteus maximus raised by thehead of the bone, and one or more of the external rotators areusually torn. The Si^c^iis ( Kig. 176) are very similar to those of theformer variety ; but the flexion, adduction, and rotation inwardsare less pronounced. The lower end of the femur crosses theopposite knee, and the great toe re
Surgery; its theory and practice . Dislocation on dorsum ilii. Dislocation into sciatic notch.(Coopers Dislocations.) internus winds over the neck of the femur, and is therefore thegreat obstacle to reduction. The capsule is generally torn below,the round ligament ruptured, the gluteus maximus raised by thehead of the bone, and one or more of the external rotators areusually torn. The Si^c^iis ( Kig. 176) are very similar to those of theformer variety ; but the flexion, adduction, and rotation inwardsare less pronounced. The lower end of the femur crosses theopposite knee, and the great toe rests on that of the opposite with the limb extended is much less than in the former DISLOCATION OF THE HlP.—VARIETIES. 433 Fig. A—B, Nelatons line. variety; but with the limb flexed it is much greater. This isshown in the accompanying diagram (Fig. 178), and depends uponthe fact that in the dislocation on to the dorsum ilii the head of the bone in extension lies abovethe acetabulum, and whenflexed at a right angle to thebody on the same level as theacetabulum ; whereas in thesciatic dislocation the head ofthe bone in extension is al-most on the same level as theacetabulum, but when flexedat a right angle to the bodyHes considerably behind theacetabulum, 3. Dislocatio7i into the ob-turator foramen {the thyroidand doivnwards of Bigelow).—The head is displaced down-wards on to the obturator ex-ternus, where it lies suspendedby the Y ligament, and mayremain either just below theacetabulum, or be carried sHghtly inwards towards the perineum,or outwards towards the tuberosity of the ischium. The head of the bone generallylooks slightly inwards,and the trochanteroutwards. The cap-sule and round liga-ment are rupt
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectsurgery, bookyear1896
