A practical treatise on fractures and dislocations . bula, could be dis-tinctly felt in nearly its whole extent; the foot preserved its naturalposition; and he could walk pretty well, only that he was obliged to stepwith some care. M. Gerdy believed that the bone was too firmly fixedin its new position to be moved, and therefore made no attempt at reduc-tion. CHAPTER XXIII. TARSAL DISLOCATIONS.§ 1. Dislocations of the Astragalus. Syn.— Double dislocations of the astragalus; Malgaigne. The astragalus may be dislocated forward, outward, inward, backward;or it may be dislocated obliquely in eithe
A practical treatise on fractures and dislocations . bula, could be dis-tinctly felt in nearly its whole extent; the foot preserved its naturalposition; and he could walk pretty well, only that he was obliged to stepwith some care. M. Gerdy believed that the bone was too firmly fixedin its new position to be moved, and therefore made no attempt at reduc-tion. CHAPTER XXIII. TARSAL DISLOCATIONS.§ 1. Dislocations of the Astragalus. Syn.— Double dislocations of the astragalus; Malgaigne. The astragalus may be dislocated forward, outward, inward, backward;or it may be dislocated obliquely in either of the diagonals between theselines; it may be simply rotated upon its lateral axis, without much, ifany, lateral displacement; and, finally, it has been occasionally drivenbetween the tibia and fibula, tearing away the intermediate ligaments, andgenerally fracturing one or both bones of the leg. Causes.—The causes which have been found chiefly operative in the 1 New York Medical Journal, vol. xlvii. 1888. DISLOCATIONS OF THE ASTRAGALUS. 785. Dislocation of the astragalus outward. Anatomicalrelations. production of this dislocation are very much the same as those which pro-duce, under other circumstances, a dislocation of the lower end of thetibia. Thus, a fall from a height upon the bottom of the foot, accom-panied with a violent ab-duction, adduction, flexion, FlG- 49S-or extension, may deter-mine a dislocation of theastragalus inward, outward,backward, or it is accom-plished by a mere wrench-ing or twisting of the footin machinery, or in thewheel of a carriage, or bybeing caught between twoirregular bodies. It maybe produced also by adirect blow. Symptoms.—The great prominence occasioned by the displacement ofthe bone in either of these several directions, accompanied generally withmore or less lateral deviation of the foot, is alone sufficient to indicatethe true nature of the accident. In some cases, also, the foot is forciblyflexed or extended;
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